CN112244972B - Magnesium alloy screw for joint injury of tibia and fibula under ankle joint - Google Patents
Magnesium alloy screw for joint injury of tibia and fibula under ankle joint Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/8635—Tips of screws
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- Heart & Thoracic Surgery (AREA)
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Abstract
The invention belongs to the technical field of application of magnesium alloy screws, and particularly relates to a magnesium alloy screw for joint injury of shin and calf under an ankle joint, wherein when the magnesium alloy screw is used, a universal screwing device used comprises a supporting shell, a screwing column and an adjusting block; the upper surface of the supporting shell is fixedly connected with a fixing plate; the fixing plate is internally and rotatably connected with a screwing column; the lower surface of the supporting shell is in threaded connection with an adjusting plate; the upper surface of the adjusting plate is connected with an adjusting block in a sliding manner; the invention effectively realizes the conversion of screwing directions, enables the screw which needs to be obliquely screwed into the bone to be fixed in the direction in the early stage of screwing through the universal screwing device, then realizes the oblique transmission of the screw through vertical screwing, ensures the stability of oblique punching of the screw, is convenient for the oblique fixed connection in bone resetting and fixing operations, and realizes the long-term coexistence of the screw in the bone of a human body by using the magnesium alloy screw.
Description
Technical Field
The invention belongs to the technical field of magnesium alloy screw application, and particularly relates to a magnesium alloy screw for ankle joint inferior tibiofibular combined injury.
Background
The research of magnesium and magnesium alloy materials as orthopedic implants is further deepened, and the magnesium alloy has the following characteristics: magnesium is a very low density metal with a density of 1.74g/cm2And human bone density (1.75 g/cm)2) The elastic modulus of magnesium is 41-45 GPa, the magnesium is closer to bone tissues than traditional metal plants, magnesium is one of trace elements in human bodies, and half of the trace elements exist in the bone tissues, so that the magnesium and magnesium alloy is easy to corrode in a body fluid environment and becomes a basis of a biodegradable material as long as the corrosion degradation rate of the plants in the magnesium and magnesium alloy is controlled, serum Mg2+ is not increased after the magnesium and magnesium alloy is implanted, the magnesium and magnesium alloy has good biological safety, the magnesium and magnesium alloy are easy to corrode in a body fluid environment and become a basis of the biodegradable material, nontoxic oxides generated after the magnesium and magnesium alloy is corroded can be discharged out of the body through urine by kidneys, and degradation products of the magnesium and magnesium alloy can also have a bone forming effect when the magnesium and magnesium alloy is used around the bone tissues, in recent years, along with the improvement of metallurgical technology and the development of electrochemical technology, the purity of a fixture in the magnesium is greatly improved, and various types of magnesium alloys are researched and developed, the problem of degradation rate is solved, the magnesium screw with the purity of 99.9% and the steel plate are implanted into the rabbit ulna by Chaya, the fracture healing condition is evaluated after 4 weeks, Micro-CT finds that the internal fixture begins to degrade, the magnesium does not inhibit the growth and the shaping of the fracture broken end, and a large amount of new bones around the magnesium material grow and are bridged in the fractureThe fracture is completely healed after 16 weeks between the broken ends, the internal implant is completely degraded, and the magnesium alloy is also used as a filling material to treat the problems of structural bone defect, bone nonunion and other orthopedic clinical troubles caused by wounds, infection, tumors and the like.
In the prior art, the current treatment principle of the combined injury separation of the shin-lowering rib is restoration and fixation, screws are required to be used in the fixation process, the common metal materials in orthopedics clinical use comprise medical stainless steel, titanium alloy, chromium alloy and the like, the medical metal materials are all inert metals, and the medical metal materials are used as bone or joint substitutes and fracture internal fixtures in clinical use for a long time, but still have the following defects: firstly, mechanical defects, namely the elastic modulus of the implant is not matched with bone tissues, and a stress shielding effect can be generated after the implant is implanted, so that the bone healing speed is reduced, the autologous bone absorption is realized, and the osteoporosis is caused; the other is the biological defect that the implant is left in the body for a long time, abrasion dust is possibly generated after the implant rubs with surrounding tissues, toxic ions are released, inflammatory reaction and allergic reaction around the implant are caused, the body health is influenced, internal plants need to be taken out through a secondary operation, meanwhile, when the ankle joint lower tibiofibular syndesmosis repair operation is carried out, an operator needs to drive screws into bones at the lower tibiofemoral syndesmosis position to reset and fixedly repair the bones at the lower tibiofemoral syndesmosis position, but due to the uncertainty of the fracture direction, the fixing directions of the screws in each operation are different, the reduction and the fixed connection of different fractures are adapted through the connection of different screws driven into the bones, when the screws are vertically driven into the bones, the problems that the screws are deflected, bent and difficult to rotate and operate and the like easily occur when the screws are driven into the bones in an inclined mode.
In view of the above, in order to overcome the above technical problems, the present inventors have designed and developed a magnesium alloy screw for joint injury of tibia and fibula under the ankle joint, which solves the above technical problems by using a special universal screwdriver.
Disclosure of Invention
In order to make up the deficiency of the prior art, the current treatment principle of the combined injury separation of the shin-lowering rib is reduction and fixation in the prior art, screws are needed to be used in the fixation process, the common metal materials in clinical orthopaedics comprise medical stainless steel, titanium alloy, chromium alloy and the like, the medical metal materials are all inert metals, and the medical metal materials are used as bone or joint substitutes and fracture internal fixtures for a long time in clinical practice, but still have the following defects: firstly, mechanical defects, namely the elastic modulus of the implant is not matched with bone tissues, and a stress shielding effect can be generated after the implant is implanted, so that the bone healing speed is reduced, the autologous bone absorption is realized, and the osteoporosis is caused; secondly, the biological defect that the implant is remained in the body for a long time, abrasion is possibly generated after the implant is rubbed with surrounding tissues, toxic ions are released, inflammatory reaction and anaphylactic reaction around the implant are caused, the health of the organism is influenced, the inner plant needs to be taken out by a secondary operation, meanwhile, when the ankle joint lower tibiofibular combined repair operation is carried out, an operator needs to drive screws into the bone at the lower tibiofibular combined part to realize the reduction and fixed repair of the bone at the lower tibiofibular combined part, but because of the uncertainty of the direction of the fracture, the fixing direction of each surgical screw is different, and through different connections driven into bones, so as to adapt to the reduction and the fixed connection of different fractures, when the screw is vertically driven into the bone, the screw is more convenient and relaxed, however, when the magnesium alloy screw is obliquely driven into a bone, the problems of deviation, bending and difficult rotation operation of the screw are easy to occur, and the invention provides the magnesium alloy screw for ankle joint inferior tibiofibular combined injury.
The technical scheme adopted by the invention for solving the technical problems is as follows: the magnesium alloy screw for the ankle joint lower tibiofibular syndesmosis injury is designed in a cylindrical structure; the lower end face of the screw is chamfered with an oblique angle; the surface of the screw is tapped with threads; the thread surface of the screw is provided with a guide groove; the number of the guide grooves is four, and the guide grooves are uniformly distributed;
when the magnesium alloy screw is used, the screw is added into the universal screwdriver, and is screwed into a bone through the universal screwdriver; the universal screwing device comprises a supporting shell, a screwing column and an adjusting block; the supporting shell is designed into a cylindrical structure; the surface of the supporting shell is provided with a through hole; a fixing plate is fixedly connected to the position, close to the upper surface of the supporting shell, inside the through hole; the upper surface of the fixed plate is provided with a rotating hole; the interior of the rotating hole is rotatably connected with a screwing column; the surface of the screwing column is fixedly connected with a first supporting plate at a position close to the lower end face of the screwing column; the number of the first supporting plates is two, and the first supporting plates are distributed up and down; the surfaces of the two first supporting plates are provided with first through holes, the number of the first through holes on the surfaces of the two first supporting plates is three, and the first through holes are corresponding to each other up and down; the same first transmission column is arranged between the two corresponding upper and lower first through holes; an adjusting plate is in threaded connection with the position, close to the lower surface of the supporting shell, inside the through hole; the upper surface of the adjusting plate is provided with a ball groove; an arc guide hole is formed in the ball groove; the inner part of the arc guide hole is connected with an adjusting block in a sliding way; a rotating ring is rotatably connected inside the adjusting block; the inner thread of the rotating ring is connected with a screw; the upper surface of the adjusting block is fixedly connected with a guide ring; the inner part of the guide ring is connected with a power column in a sliding way; the interior of the power column is fixedly connected with bar-shaped columns which are uniformly arranged, and the bar-shaped columns are connected to the interior of the guide groove in a sliding manner; the surface of the power column is fixedly connected with a second supporting plate close to the upper end face of the power column; the number of the second supporting plates is two, and the second supporting plates are distributed up and down; the surfaces of the two second supporting plates are provided with second through holes, the number of the second through holes on the surfaces of the two second supporting plates is three, and the two second through holes are corresponding to each other up and down; the same second transmission column is arranged between the two corresponding second through holes at the upper part and the lower part; the second transmission column is hinged with the corresponding first transmission column;
when the fracture setting and fixing device works, in the prior art, the current treatment principle of combined injury and separation of the lower shin row is restoration and fixation, screws are needed in the fixing process, the common metal materials for orthopedics clinical use comprise medical stainless steel, titanium alloy, chromium alloy and the like, the medical metal materials are all inert metals, and the medical metal materials are used as bone or joint substitutes and fracture internal fixtures and have been used for a long time in clinic, but still have the following defects: firstly, mechanical defects, namely the elastic modulus of the implant is not matched with bone tissues, and a stress shielding effect can be generated after the implant is implanted, so that the bone healing speed is reduced, the autologous bone absorption is realized, and the osteoporosis is caused; the second is the biological defect that the implant is retained in the body for a long time and may be combined withThe abrasion dust is generated after the peripheral tissues are rubbed, toxic ions are released, inflammatory reaction and allergic reaction around the implant are caused, the health of the body is affected, internal plants need to be taken out through secondary operations, meanwhile, when the ankle joint tibiofibular syndesmosis repair operation is carried out, an operator needs to drive screws into bones at the joint part of the tibiofibular syndesmosis, the reduction and the fixed repair of the bones at the joint part of the tibiofibular syndesmosis are realized, but the fixing directions of the screws are different due to the uncertainty of the fracture directions, the screw fixing directions of each operation are different, the reduction and the fixed connection of different fractures are adapted through the connection of different screws driven into the bones, when the screws are vertically driven into the bones, the screws are convenient and easy, but when the screws are driven into the bones in an inclined mode, the problems of deviation, bending, difficult rotation operation and the like of the screws easily occur, and the magnesium alloy screw for ankle joint tibiofibular syndesmosis damage is adopted; the research of magnesium and magnesium alloy materials as orthopedic implants is further deepened, and the magnesium alloy has the following characteristics: magnesium is a very low density metal with a density of 1.74g/cm2And human bone density (1.75 g/cm)2) The elastic modulus of magnesium is 41-45 GPa, the magnesium is closer to bone tissues than traditional metal plants, magnesium is one of trace elements in human bodies, and half of the trace elements exist in the bone tissues, so that the magnesium and magnesium alloy is easy to corrode in a body fluid environment and becomes a basis of a biodegradable material as long as the corrosion degradation rate of the plants in the magnesium and magnesium alloy is controlled, serum Mg2+ is not increased after the magnesium and magnesium alloy is implanted, the magnesium and magnesium alloy has good biological safety, the magnesium and magnesium alloy are easy to corrode in a body fluid environment and become a basis of the biodegradable material, nontoxic oxides generated after the magnesium and magnesium alloy is corroded can be discharged out of the body through urine by kidneys, and degradation products of the magnesium and magnesium alloy can also have a bone forming effect when the magnesium and magnesium alloy is used around the bone tissues, in recent years, along with the improvement of metallurgical technology and the development of electrochemical technology, the purity of a fixture in the magnesium is greatly improved, and various types of magnesium alloys are researched and developed, the problem of degradation rate is solved, the magnesium screw with the purity of 99.9% and a steel plate are implanted into the ulna of a rabbit by Chaya, the fracture healing condition is evaluated after 4 weeks, Micro-CT finds that the internal fixture begins to degrade, the magnesium does not inhibit the growth and the shaping of the fractured end, and finds that a large amount of new bones grow into the periphery of the magnesium material and are bridged between the fractured ends of the bones after 16 weeksThe fracture is completely healed, the internal implant is completely degraded, and the magnesium alloy is also used as a filling material for treating the problems of structural bone defect, bone nonunion and the like caused by trauma, infection, tumor and the like in orthopedics clinic; when in operation, the screw is required to be obliquely driven into a bone at a damaged part, the screw is firstly added into the universal screwing device, the position of the adjusting block is adjusted simultaneously, so that the screw faces to the required screwing direction, meanwhile, a shallow fixing groove is drilled on the surface of the bone near the tibia and fibula combined damaged part under the ankle joint, the support shell is fixed inside the shallow fixing groove, the screwing column is rotated by rotating the screwing column, so that the first support plate can drive the first transmission column to rotate, the first transmission column further drives the corresponding second transmission column to rotate, the second transmission column drives the second transmission plate to rotate, the second transmission plate drives the power column to rotate, the screw can be driven to rotate by matching with a strip-shaped column fixedly connected inside the power column, so that the screw and the rotating ring relatively rotate, and due to the threaded connection between the screw and the rotating ring, the screw can continuously downwards feed when rotating, the invention realizes that the screw is driven into the bone along the fixing direction to realize the restoration and the fixation of the bone, effectively realizes the conversion of the screwing direction, ensures that the screw which needs to be obliquely driven into the bone is fixed in the direction in the early stage of the driving through the universal screwing device, and then realizes the oblique transmission of the screw through the vertical screwing, ensures the stability of the oblique punching of the screw, is convenient for the oblique fixed connection in the bone restoration and the fixation operation, and realizes the long-term coexistence of the screw in the human body bone through the magnesium alloy screw.
Preferably, the lower surface of the adjusting plate is fixedly connected with a circle of fixing columns which are uniformly distributed, corresponding fixing grooves are formed near the bone injury positions, and the fixing columns are inserted into the corresponding fixing grooves, so that the universal screwing device is firmly fixed, and the bone fixing wound surface is small;
the during operation, when revolving the revolving column soon in the rotation, not only can avoid revolving the rotation that revolves the revolving column and directly drive whole universal revolving spinner, influence normal screw and beat into the bone in, simultaneously because universal revolving spinner itself is compared in the volume of screw great, when fixing universal revolving spinner, it is great to the wound of bone, through setting up the fixed column, through linking firmly the fixed column of evenly arranging at the lower surface of regulating plate, peg graft in the inside of fixed slot through the fixed column, the wound face of bone has not only been reduced, universal revolving spinner's rotation has been avoided simultaneously, fixed effect has also obtained better promotion.
Preferably, the lower surfaces of the fixing columns are provided with pressing grooves; the inner parts of the pressure grooves are connected with pressure columns in a sliding manner; the bottoms of the pressure grooves are fixedly connected with first springs, and the first springs are fixedly connected with corresponding pressure columns; the side surfaces of the fixing columns are provided with limit grooves which are uniformly distributed, and the limit grooves are communicated with the corresponding pressure grooves; limiting blocks are connected inside the limiting grooves in a sliding mode; the bottoms of the limiting grooves are fixedly connected with second springs, and the second springs are fixedly connected with corresponding limiting blocks;
during operation, through setting up compression leg and stopper, when the roof pressure rotates and revolves wrong post, universal ware can the roof pressure bone of revolving, make the compression leg slide in the inside that corresponds the indent, the atmospheric pressure increase of indent inside, the inside gas of indent can enter into the inside of spacing groove, make the stopper of spacing inslot portion ejecting, further improved the fixed of revolving the ware to universal revolving through the stopper, universal ware roll-off fixed slot that revolves has not only not been exempted from, the problem of rocking of universal revolving the ware has been avoided simultaneously, the stability of universal revolving the ware has been improved.
Preferably, the thread of the surface of the adjusting plate and the thread of the surface of the screw are opposite in screwing direction, and when the screw is rotated in the forward direction and penetrates into the bone, locking force is provided for the adjusting plate;
during operation, the screw thread on the surface of the adjusting plate and the screw thread on the surface of the screw are designed to be of opposite structures, when the rotating screwing column rotates, and the screwing column drives the screw to rotate through the reversing transmission structure, the rotating direction can drive the adjusting plate to be further fixed, and the problem of looseness of the adjusting plate is avoided.
Preferably, the swivel and the adjusting block are designed to rotate in one direction; the lower surface of the adjusting block is provided with uniformly distributed transmission grooves; pressing blocks are connected inside the transmission grooves in a sliding mode; the bottoms of the transmission grooves are fixedly connected with third springs, and the third springs are fixedly connected with corresponding press blocks; the side surface of the adjusting block is provided with top grooves which are uniformly distributed; the inner parts of the top grooves are all connected with top blocks in a sliding manner; the bottom of each top groove is fixedly connected with a fourth spring, and the fourth springs are fixedly connected with the corresponding top blocks;
during operation, when fixing the regulating block, the arc guide hole can be extruded to the regulating block, and then the briquetting can receive the extrusion, and the briquetting can compress the gas that corresponds the driving groove inside for the inside in driving groove is entered into the inside in overhead groove, and then the kicking block of overhead groove inside is derived, further carries out effectual spacing fixed to the regulating block through the kicking block, has avoided the removal of regulating block to lead to the screw to beat the problem partially.
Preferably, the adjusting block is provided with control grooves which are uniformly distributed relative to the side surface of one side of the rotating ring; sliding blocks are connected inside the control grooves in a sliding mode; the sliding blocks and the corresponding control grooves are fixedly connected with telescopic rods which are uniformly arranged; the sliding blocks are provided with sliding grooves relative to the side surface of one side of the rotating ring; the inner parts of the sliding grooves are connected with connecting rods in a sliding manner; fifth springs are fixedly connected between the connecting rods and the bottoms of the corresponding sliding grooves; the side surfaces of the connecting rods, which are opposite to one side of the rotating ring, are fixedly connected with friction plates;
during operation, through setting up sliding block and friction disc, receive the extrusion back when the briquetting, the inside of telescopic link can be gone into with step-by-step to the inside of indent inside, make the piston rod of telescopic link ejecting, and then drive the sliding block and remove, the sliding block can drive the removal of connecting rod and friction disc, separation between friction disc and the swivel this moment, the swivel can carry out normal antiport, when having avoided antiport to revolve wrong post, lead to the not hard up of regulating plate, when the universal ware of revolving is not fixed simultaneously, the friction disc can be fixed between with the swivel this moment, be convenient for reverse to the inside screw in screw of the universal ware of revolving.
The invention has the following beneficial effects:
1. when the magnesium alloy screw for ankle joint lower tibiofibular combined injury is used, the used universal screwing device effectively realizes the conversion of screwing directions by arranging the supporting shell, the screwing column and the adjusting block, the screw which needs to be obliquely driven into a bone is fixed in the direction in the early stage by the universal screwing device, and then the oblique transmission of the screw can be realized by vertically screwing, so that the stability of oblique punching of the screw is ensured, the oblique fixed connection in bone restoration and fixing operations is facilitated, and the magnesium alloy screw is used, so that the screw can coexist in the bone of a human body for a long time.
2. According to the magnesium alloy screw for ankle joint lower tibiofibular combined injury, when the magnesium alloy screw is used, the universal screwing device is provided with the fixing column, the pressing column and the limiting block, when the screwing column is rotated in a jacking mode, the universal screwing device can jack the bone, the pressing column slides into the corresponding pressing groove, the air pressure in the pressing groove is increased, the gas in the pressing groove can enter the limiting groove, the limiting block in the limiting groove is ejected out, the fixation of the universal screwing device is further improved through the limiting block, the universal screwing device is not prevented from sliding out of the fixing groove, the shaking problem of the universal screwing device is avoided, and the stability of the universal screwing device is improved.
3. The magnesium alloy screw for joint injury of tibia and fibula under the ankle joint provided by the invention adopts magnesium alloy materials, so that the problems that the common metal materials for orthopedics clinical use comprise medical stainless steel, titanium alloy, chromium alloy and the like, the medical metal materials are all inert metals, and the magnesium alloy screw has been used clinically for a long time as bone or joint substitutes and fracture internal fixtures, but still has the following defects: firstly, mechanical defects, namely the elastic modulus of the implant is not matched with bone tissues, and a stress shielding effect can be generated after the implant is implanted, so that the bone healing speed is reduced, the autologous bone absorption is realized, and the osteoporosis is caused; the other is the biological defect that the implant is left in the body for a long time, abrasion is possibly generated after the implant is rubbed with surrounding tissues, toxic ions are released, inflammatory reaction and allergic reaction around the implant are caused, the health of the organism is influenced, and the plants in the body need to be taken out through a secondary operation.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is an external view of a universal spinner used in the present invention;
FIG. 2 is a perspective view of a universal spinner used in the present invention;
FIG. 3 is a top view of the universal spinner used in the present invention;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 5 is a cross-sectional view at B-B in FIG. 3;
FIG. 6 is a cross-sectional view at C-C of FIG. 4;
FIG. 7 is an enlarged partial view at D of FIG. 5;
FIG. 8 is an enlarged partial view at E in FIG. 6;
in the figure: the device comprises a supporting shell 1, a screwing column 2, an adjusting block 3, a fixing plate 4, a first supporting plate 5, a first transmission column 6, an adjusting plate 7, a ball groove 8, an arc-shaped guide hole 9, a rotating ring 10, a screw 11, a power column 12, a second supporting plate 13, a second transmission column 14, a fixing column 15, a pressing column 16, a first spring 17, a limiting block 18, a second spring 19, a pressing block 20, a third spring 21, a top block 22, a fourth spring 23, a sliding block 24, a telescopic rod 25, a connecting rod 26, a fifth spring 27 and a friction plate 28.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 8, the magnesium alloy screw for ankle joint tibiofibular syndesmosis injury in the invention is designed in a cylindrical structure, and the screw 11 is made of a magnesium alloy material; the lower end surface of the screw 11 is chamfered with an oblique angle; the surface of the screw 11 is tapped; a guide groove is formed in the thread surface of the screw 11; the number of the guide grooves is four, and the guide grooves are uniformly distributed;
when the magnesium alloy screw 11 is used, the screw 11 is screwed into a bone through a universal screw driver by adding the screw 11 into the universal screw driver; the universal screwing device comprises a support shell 1, a screwing column 2 and an adjusting block 3; the supporting shell 1 is designed into a cylindrical structure; the surface of the supporting shell 1 is provided with a through hole; a fixing plate 4 is fixedly connected to the position, close to the upper surface of the support shell 1, in the through hole; the upper surface of the fixed plate 4 is provided with a rotating hole; the interior of the rotating hole is rotatably connected with a screwing column 2; the surface of the screwing column 2 is fixedly connected with a first supporting plate 5 at a position close to the lower end face of the screwing column 2; the number of the first supporting plates 5 is two, and the first supporting plates are distributed up and down; the surfaces of the two first supporting plates 5 are provided with first through holes, the number of the first through holes on the surfaces of the two first supporting plates 5 is three, and the first through holes are corresponding to each other up and down; the same first transmission column 6 is arranged between the two corresponding upper and lower first through holes; an adjusting plate 7 is in threaded connection with the position, close to the lower surface of the support shell 1, in the through hole; the upper surface of the adjusting plate 7 is provided with a ball groove 8; an arc guide hole 9 is formed in the ball groove 8; the inner part of the arc guide hole 9 is connected with an adjusting block 3 in a sliding way; a rotating ring 10 is rotatably connected inside the adjusting block 3; a screw 11 is connected to the inner thread of the rotating ring 10; the upper surface of the adjusting block 3 is fixedly connected with a guide ring; the inner part of the guide ring is connected with a power column 12 in a sliding way; the interior of the power column 12 is fixedly connected with bar-shaped columns which are uniformly arranged and are connected with the interior of the guide groove in a sliding manner; a second supporting plate 13 is fixedly connected to the surface of the power column 12 close to the upper end face of the power column 12; the number of the second supporting plates 13 is two, and the second supporting plates are distributed up and down; the surfaces of the two second supporting plates 13 are both provided with second through holes, and the number of the second through holes on the surfaces of the two second supporting plates 13 is three and is corresponding to the upper part and the lower part; the same second transmission column 14 is arranged between the two corresponding upper and lower second through holes; the second transmission column 14 is hinged with the corresponding first transmission column 6;
when the fracture setting and fixing device works, in the prior art, the current treatment principle of combined injury and separation of the lower shin row is restoration and fixation, screws 11 are needed in the fixing process, the common metal materials for orthopedics clinical use comprise medical stainless steel, titanium alloy, chromium alloy and the like, the medical metal materials are all inert metals, and the medical metal materials are used as bone or joint substitutes and fracture internal fixtures for a long time in clinic, but still have the following defects: one is the mechanical defect that the elastic modulus of the implant is not matched with the bone tissue, and the implant is implantedThen, the stress shielding effect can be generated, which leads to the slow bone healing speed, the autologous bone absorption and the osteoporosis; the second is the biological defect that the implant is left in the body for a long time, abrasion dust is generated after the implant is possibly rubbed with surrounding tissues, toxic ions are released, inflammatory reaction and anaphylactic reaction around the implant are caused, the body health is influenced, the internal plants need to be taken out by secondary operation, meanwhile, when the ankle joint lower tibiofibula combined repair operation is carried out, an operator needs to drive the screw 11 into the bone at the lower tibiofemoral component combined part to realize the reduction and fixed repair of the bone at the lower tibiofemoral component combined part, but because the direction of fracture is uncertain, the fixing direction of the screw 11 is different in each operation, the screw 11 is connected through different driving into the bone to adapt to the reduction and fixed connection of different fractures, when the screw 11 is vertically driven into the bone, the problems that the screw 11 is deflected, bent and is difficult to rotate and the like easily occur, the magnesium alloy screw for ankle joint lower tibiofibular combined injury is adopted; the research of magnesium and magnesium alloy materials as orthopedic implants is further deepened, and the magnesium alloy has the following characteristics: magnesium is a very low density metal with a density of 1.74g/cm2And human bone density (1.75 g/cm)2) The elastic modulus of magnesium is 41-45 GPa, the magnesium is closer to bone tissues than traditional metal plants, magnesium is one of trace elements in human bodies, and half of the trace elements exist in the bone tissues, so that the magnesium and magnesium alloy is easy to corrode in a body fluid environment and becomes a basis of a biodegradable material as long as the corrosion degradation rate of the plants in the magnesium and magnesium alloy is controlled, serum Mg2+ is not increased after the magnesium and magnesium alloy is implanted, the magnesium and magnesium alloy has good biological safety, the magnesium and magnesium alloy are easy to corrode in a body fluid environment and become a basis of the biodegradable material, nontoxic oxides generated after the magnesium and magnesium alloy is corroded can be discharged out of the body through urine by kidneys, and degradation products of the magnesium and magnesium alloy can also have a bone forming effect when the magnesium and magnesium alloy is used around the bone tissues, in recent years, along with the improvement of metallurgical technology and the development of electrochemical technology, the purity of a fixture in the magnesium is greatly improved, and various types of magnesium alloys are researched and developed, so that the problem of degradation rate is solved, the magnesium screw 11 with the purity of 99.9 percent and the steel plate are implanted into the ulna of the rabbit by Chaya, and the fracture healing condition is evaluated after 4 weeksUnder the condition, the Micro-CT finds that the internal fixture starts to degrade, the magnesium does not inhibit the growth and the shaping of the fractured ends of the fracture, and finds that a large amount of new bones around the magnesium material grow into the fracture and are bridged between the fractured ends of the bones for 16 weeks, the fracture is completely healed, the internal implant is completely degraded, and the magnesium alloy is also used as a filling material for treating the problems of structural bone defect, bone nonunion and other orthopedics clinical troubles caused by trauma, infection, tumor and other reasons; when in operation, the screw 11 needs to be obliquely driven into a bone at a damaged part, the screw 11 needs to be added into the universal screwing device at first, the position of the adjusting block 3 is adjusted at the same time, so that the screw 11 faces to a required screwing direction, meanwhile, a shallow fixing groove is drilled on the surface of the bone near the tibia and fibula combined damaged part under the ankle joint, the supporting shell 1 is fixed inside the shallow fixing groove, the screwing column 2 is rotated by rotating the screwing column 2, the first supporting plate 5 is driven to rotate by the rotation of the screwing column 2, the first supporting plate 5 drives the first transmission column 6 to rotate, the first transmission column 6 further drives the corresponding second transmission column 14 to rotate, the second transmission column 14 drives the second transmission plate to rotate, the second transmission plate drives the power column 12 to rotate, the screw 11 can be driven to rotate by the power column 12 matching with a strip-shaped column fixedly connected inside the power column, so that the screw 11 and the rotating ring 10 relatively rotate, due to the fact that the screw 11 is in threaded connection with the rotary ring 10, the screw 11 can continuously and downwards feed when rotating, the screw 11 is driven into a bone along a fixing direction, and the bone is reset and fixed.
As an embodiment of the invention, a circle of fixing columns 15 which are uniformly arranged is fixedly connected to the lower surface of the adjusting plate 7, corresponding fixing grooves are formed near the bone injury part, and the fixing columns 15 are inserted into the corresponding fixing grooves, so that the universal screwdriver is firmly fixed, and the bone fixing wound surface is smaller;
during operation, when revolving and twisting post 2 when rotating, not only can avoid revolving and twist the rotation that post 2 directly drove whole universal revolving and twist the ware, influence normal screw 11 and beat into the bone in, simultaneously because universal revolving and twisting the ware itself is great in the volume of screw 11 of comparing, when revolving and twisting the ware to universal, it is great to the wound of bone, through setting up fixed column 15, through linking firmly fixed column 15 of evenly arranging at the lower surface of regulating plate 7, peg graft in the inside of fixed slot through fixed column 15, the wound face of bone has not only been reduced, the rotation of universal revolving and twisting the ware has been avoided simultaneously, fixed effect has also obtained better promotion.
As an embodiment of the present invention, the lower surfaces of the fixing posts 15 are both provided with a pressing groove; the inner parts of the pressure grooves are all connected with pressure columns 16 in a sliding manner; the bottoms of the pressure grooves are fixedly connected with first springs 17, and the first springs 17 are fixedly connected with the corresponding pressure columns 16; the side surfaces of the fixed columns 15 are provided with limit grooves which are uniformly distributed, and the limit grooves are communicated with the corresponding pressure grooves; the limiting blocks 18 are connected to the inner parts of the limiting grooves in a sliding mode; the bottoms of the limiting grooves are fixedly connected with second springs 19, and the second springs 19 are fixedly connected with corresponding limiting blocks 18;
during operation, through setting up compression leg 16 and stopper 18, when the roof pressure is rotated and is twisted post 2 soon, universal ware can the roof pressure bone of twisting soon, make compression leg 16 slide into the inside that corresponds the indent, the atmospheric pressure increase of indent inside, the inside gas of indent can enter into the inside of spacing groove, make stopper 18 of spacing inslot portion ejecting, it fixes to universal ware of twisting soon to have further improved through stopper 18, universal ware roll-off fixed slot of twisting soon has not only been exempted from to universal, the universal problem of rocking of twisting the ware has been avoided simultaneously, the stability of universal ware of twisting has been improved.
As an embodiment of the invention, the thread on the surface of the adjusting plate 7 and the thread on the surface of the screw 11 are opposite in rotation direction, and when the screw 11 is rotated in the positive direction to penetrate into the bone, locking force is provided for the adjusting plate 7;
during operation, the screwing direction of the threads on the surface of the adjusting plate 7 and the screwing direction of the threads on the surface of the screw 11 are designed to be opposite, when the screwing column 2 is rotated, and the screwing column 2 drives the screw 11 to rotate through the reversing transmission structure, the rotating direction can drive the adjusting plate 7 to be further fixed, and the problem of looseness of the adjusting plate 7 is avoided.
As an embodiment of the invention, the swivel 10 and the adjusting block 3 are designed to rotate in one direction; the lower surface of the adjusting block 3 is provided with uniformly arranged transmission grooves; the transmission grooves are internally and slidably connected with pressing blocks 20; the bottoms of the transmission grooves are fixedly connected with third springs 21, and the third springs 21 are fixedly connected with corresponding pressing blocks 20; the side surface of the adjusting block 3 is provided with top grooves which are uniformly distributed; the insides of the top grooves are all connected with top blocks 22 in a sliding manner; the bottom of each top groove is fixedly connected with a fourth spring 23, and the fourth springs 23 are fixedly connected with the corresponding top blocks 22;
during operation, when fixing adjusting block 3, arc guide hole 9 can be extruded to adjusting block 3, and then briquetting 20 can receive the extrusion, and briquetting 20 can compress the gas that corresponds the driving groove inside for the inside in driving groove gas entering into the inside in overhead tank, and then the inside kicking block 22 of overhead tank derives, further carries out effectual spacing fixed to adjusting block 3 through kicking block 22, and the removal of having avoided adjusting block 3 leads to screw 11 to beat the problem partially.
As an embodiment of the invention, the side surface of the adjusting block 3 opposite to one side of the rotating ring 10 is provided with control grooves which are uniformly arranged; sliding blocks 24 are connected inside the control grooves in a sliding mode; the sliding blocks 24 and the corresponding control grooves are fixedly connected with telescopic rods 25 which are uniformly arranged; sliding grooves are formed in the side face, opposite to one side face of the rotating ring 10, of each sliding block 24; the connecting rods 26 are connected inside the sliding grooves in a sliding manner; a fifth spring 27 is fixedly connected between the connecting rod 26 and the bottom of the corresponding chute; the side face of the connecting rod 26 opposite to one side face of the rotating ring 10 is fixedly connected with a friction plate 28;
during operation, through setting up sliding block 24 and friction disc 28, after briquetting 20 received the extrusion, the inside gas of indent can step into the inside of telescopic link 25 with step-by-step, make the piston rod of telescopic link 25 ejecting, and then drive sliding block 24 and remove, sliding block 24 can drive the removal of connecting rod 26 and friction disc 28, separation between friction disc 28 and swivel 10 this moment, swivel 10 can carry out normal antiport, when having avoided antiport to revolve wrong revolving column 2, lead to the not hard up of regulating plate 7, when universal revolved the spinner not fixed simultaneously, friction disc 28 can be fixed between this moment and swivel 10, be convenient for reverse to the inside screw in screw 11 of universal spinner.
The specific working process is as follows:
during operation, when the screw 11 needs to be obliquely driven into a bone at a damaged part during operation, the screw 11 needs to be added into the universal screwing device at first, the position of the adjusting block 3 is adjusted at the same time, the screw 11 faces to a required screwing direction, a shallow fixing groove is drilled on the surface of the bone near a tibiofibula combined damaged part under an ankle joint, the supporting shell 1 is fixed inside the shallow fixing groove, the screwing column 2 is rotated, the rotation of the screwing column 2 drives the first supporting plate 5 to rotate, the first supporting plate 5 drives the first transmission column 6 to rotate, the first transmission column 6 further drives the corresponding second transmission column 14 to rotate, the second transmission column 14 drives the second transmission plate to rotate, the second transmission plate drives the power column 12 to rotate, the screw 11 can be driven to rotate by matching with a strip-shaped column fixedly connected inside the power column 12, and the screw 11 and the rotating ring 10 rotate relatively, due to the threaded connection between the screw 11 and the rotating ring 10, the screw 11 can continuously feed downwards while rotating, so that the screw 11 is driven into a bone along a fixing direction, and the bone is reset and fixed; when the screwing column 2 is rotated, the phenomenon that the screwing column 2 directly drives the whole universal screwing device to rotate to affect the normal driving of the screw 11 into a bone can be avoided, meanwhile, the universal screwing device is larger in size compared with the screw 11, when the universal screwing device is fixed, the injury to the bone is larger, through the arrangement of the fixing column 15, the fixing column 15 which is uniformly distributed is fixedly connected to the lower surface of the adjusting plate 7, and the fixing column 15 is inserted into the fixing groove, so that the injury surface of the bone is reduced, the rotation of the universal screwing device is avoided, and the fixing effect is better improved; by arranging the compression leg 16 and the limiting block 18, when the compression leg 2 is rotated and screwed in a jacking mode, the universal screwing device can jack the compression leg, so that the compression leg 16 slides into the corresponding compression groove, the air pressure in the compression groove is increased, the gas in the compression groove can enter the limiting groove, the limiting block 18 in the limiting groove is ejected out, the fixation of the universal screwing device is further improved through the limiting block 18, the universal screwing device cannot slide out of the fixing groove, the problem that the universal screwing device shakes is avoided, and the stability of the universal screwing device is improved; by designing the screw thread on the surface of the adjusting plate 7 and the screw thread on the surface of the screw 11 to be of opposite directions, when the screwing column 2 is rotated and the screwing column 2 drives the screw 11 to rotate through the reversing transmission structure, the rotation direction can drive the adjusting plate 7 to be further fixed, so that the problem of looseness of the adjusting plate 7 is avoided; when the adjusting block 3 is fixed, the adjusting block 3 extrudes the arc-shaped guide hole 9, the pressing block 20 is extruded, the pressing block 20 compresses gas in the corresponding transmission groove, the gas in the transmission groove enters the inside of the top groove, the top block 22 in the top groove is led out, the adjusting block 3 is further effectively limited and fixed through the top block 22, and the problem that the bolt 11 is deflected due to movement of the adjusting block 3 is avoided; through setting up sliding block 24 and friction disc 28, after briquetting 20 received the extrusion, the inside gas of indent inside can step into the inside of telescopic link 25 with step-by-step, make the piston rod of telescopic link 25 ejecting, and then drive sliding block 24 and remove, sliding block 24 can drive the removal of connecting rod 26 and friction disc 28, separation between friction disc 28 and the change 10 this moment, change 10 can carry out normal antiport, avoided antiport to revolve when revolving and twist post 2, lead to the not hard up of regulating plate 7, when universal revolves the spinner unfixed simultaneously, friction disc 28 can be fixed between 10 with the change this moment, be convenient for reverse to the inside screw in screw 11 of universal ware of revolving.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a tibiofibular joint damage uses magnesium alloy screw under ankle joint which characterized in that: the screw (11) is designed into a cylindrical structure; the lower end face of the screw (11) is chamfered with an oblique angle; the surface of the screw (11) is tapped with threads; the thread surface of the screw (11) is provided with a guide groove; the number of the guide grooves is four, and the guide grooves are uniformly distributed;
when the magnesium alloy screw (11) is used, the screw (11) is screwed into a bone through a universal screwdriver by adding the screw (11) into the universal screwdriver; the universal screwing device comprises a supporting shell (1), a screwing column (2) and an adjusting block (3); the supporting shell (1) is designed into a cylindrical structure; the surface of the supporting shell (1) is provided with a through hole; a fixing plate (4) is fixedly connected to the position, close to the upper surface of the supporting shell (1), in the through hole; the upper surface of the fixed plate (4) is provided with a rotating hole; the interior of the rotating hole is rotatably connected with a screwing column (2); the surface of the screwing column (2) is fixedly connected with a first supporting plate (5) at a position close to the lower end surface of the screwing column (2); the number of the first supporting plates (5) is two, and the first supporting plates are distributed up and down; the surfaces of the two first supporting plates (5) are provided with first through holes, the number of the first through holes on the surfaces of the two first supporting plates (5) is three, and the first through holes are corresponding to each other up and down; the same first transmission column (6) is arranged between the two corresponding upper and lower first through holes; an adjusting plate (7) is in threaded connection with the position, close to the lower surface of the support shell (1), inside the through hole; the upper surface of the adjusting plate (7) is provided with a ball groove (8); an arc guide hole (9) is formed in the ball groove (8); the inner part of the arc guide hole (9) is connected with an adjusting block (3) in a sliding way; a rotating ring (10) is rotatably connected inside the adjusting block (3); a screw (11) is connected with the inner thread of the rotating ring (10); the upper surface of the adjusting block (3) is fixedly connected with a guide ring; the inner part of the guide ring is connected with a power column (12) in a sliding way; the interior of the power column (12) is fixedly connected with bar-shaped columns which are uniformly arranged and are connected with the interior of the guide groove in a sliding manner; a second supporting plate (13) is fixedly connected to the surface of the power column (12) close to the upper end face of the power column (12); the number of the second supporting plates (13) is two, and the second supporting plates are distributed up and down; the surfaces of the two second supporting plates (13) are provided with second through holes, the number of the second through holes on the surfaces of the two second supporting plates (13) is three, and the two second through holes are corresponding to each other up and down; the same second transmission column (14) is arranged between the two corresponding second through holes at the upper part and the lower part; the second transmission column (14) is hinged with the corresponding first transmission column (6);
the rotating ring (10) and the adjusting block (3) are designed to rotate in a single direction; the lower surface of the adjusting block (3) is provided with uniformly arranged transmission grooves; the insides of the transmission grooves are all connected with pressing blocks (20) in a sliding manner; the bottoms of the transmission grooves are fixedly connected with third springs (21), and the third springs (21) are fixedly connected with corresponding pressing blocks (20); the side surface of the adjusting block (3) is provided with top grooves which are uniformly distributed; the inner parts of the top grooves are all connected with top blocks (22) in a sliding manner; the bottom of the top groove is fixedly connected with a fourth spring (23), and the fourth spring (23) is fixedly connected with the corresponding top block (22).
2. The magnesium alloy screw for joint injury of tibia and fibula under the ankle joint as claimed in claim 1, wherein: the lower surface of regulating plate (7) links firmly fixed column (15) that the round was evenly arranged, through set up corresponding fixed slot near bone injury position to peg graft fixed column (15) and correspond the inside of fixed slot, make universal screwing ware firmly fixed, and the fixed wound face of bone is less.
3. The magnesium alloy screw for joint injury of tibia and fibula under the ankle joint as claimed in claim 2, wherein: the lower surfaces of the fixing columns (15) are provided with press grooves; the inner parts of the pressure grooves are all connected with pressure columns (16) in a sliding way; the bottoms of the pressure grooves are fixedly connected with first springs (17), and the first springs (17) are fixedly connected with corresponding pressure columns (16); the side surfaces of the fixing columns (15) are provided with limit grooves which are uniformly distributed, and the limit grooves are communicated with the corresponding pressure grooves; the limiting blocks (18) are connected inside the limiting grooves in a sliding mode; the groove bottoms of the limiting grooves are fixedly connected with second springs (19), and the second springs (19) are fixedly connected with the corresponding limiting blocks (18).
4. The magnesium alloy screw for joint injury of tibia and fibula under the ankle joint as claimed in claim 1, wherein: the thread on the surface of the adjusting plate (7) and the thread on the surface of the screw (11) are opposite in screwing direction, and when the screw (11) rotates forwards and penetrates into a bone, locking force is provided for the adjusting plate (7).
5. The magnesium alloy screw for joint injury of tibia and fibula under the ankle joint as claimed in claim 1, wherein: the side face of the adjusting block (3) opposite to one side face of the rotating ring (10) is provided with control grooves which are uniformly distributed; sliding blocks (24) are connected inside the control grooves in a sliding manner; telescopic rods (25) which are uniformly arranged are fixedly connected between the sliding blocks (24) and the corresponding control grooves; sliding grooves are formed in the side face, opposite to one side face of the rotating ring (10), of each sliding block (24); the inner parts of the sliding grooves are all connected with connecting rods (26) in a sliding manner; a fifth spring (27) is fixedly connected between the connecting rod (26) and the bottom of the corresponding sliding groove; and friction plates (28) are fixedly connected to the side faces of one side of the connecting rod (26) relative to the rotating ring (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011203469.7A CN112244972B (en) | 2020-11-02 | 2020-11-02 | Magnesium alloy screw for joint injury of tibia and fibula under ankle joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011203469.7A CN112244972B (en) | 2020-11-02 | 2020-11-02 | Magnesium alloy screw for joint injury of tibia and fibula under ankle joint |
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| Publication Number | Publication Date |
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| CN112244972A CN112244972A (en) | 2021-01-22 |
| CN112244972B true CN112244972B (en) | 2021-08-27 |
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| CN202011203469.7A Expired - Fee Related CN112244972B (en) | 2020-11-02 | 2020-11-02 | Magnesium alloy screw for joint injury of tibia and fibula under ankle joint |
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| CN120093407B (en) * | 2025-04-16 | 2025-09-26 | 伟坦(大连)生物材料有限公司 | Biomedical degradable pure magnesium screw |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813966A (en) * | 2012-08-29 | 2012-12-12 | 哈尔滨工程大学 | Medical degradable magnesium alloy bone-fixing screw |
| CN203208112U (en) * | 2012-12-26 | 2013-09-25 | 北京爱康宜诚医疗器材股份有限公司 | Directional screwdriver |
| CN109009405A (en) * | 2018-07-19 | 2018-12-18 | 周玉芳 | orthopedic drill bit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7942903B2 (en) * | 2005-04-12 | 2011-05-17 | Moskowitz Ahmnon D | Bi-directional fixating transvertebral body screws and posterior cervical and lumbar interarticulating joint calibrated stapling devices for spinal fusion |
| US8409230B2 (en) * | 2008-05-08 | 2013-04-02 | Pivot Medical, Inc. | Method and apparatus for performing arthroscopic microfracture surgery |
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- 2020-11-02 CN CN202011203469.7A patent/CN112244972B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813966A (en) * | 2012-08-29 | 2012-12-12 | 哈尔滨工程大学 | Medical degradable magnesium alloy bone-fixing screw |
| CN203208112U (en) * | 2012-12-26 | 2013-09-25 | 北京爱康宜诚医疗器材股份有限公司 | Directional screwdriver |
| CN109009405A (en) * | 2018-07-19 | 2018-12-18 | 周玉芳 | orthopedic drill bit |
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