CN110559069B - A variable angle hollow headless compression screw - Google Patents
A variable angle hollow headless compression screw Download PDFInfo
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- CN110559069B CN110559069B CN201910958479.2A CN201910958479A CN110559069B CN 110559069 B CN110559069 B CN 110559069B CN 201910958479 A CN201910958479 A CN 201910958479A CN 110559069 B CN110559069 B CN 110559069B
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- 230000006835 compression Effects 0.000 title claims abstract description 19
- 238000007906 compression Methods 0.000 title claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 28
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 6
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000004927 fusion Effects 0.000 abstract description 6
- 238000001356 surgical procedure Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
-
- 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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- 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
- A61B17/8645—Headless screws, e.g. ligament interference screws
-
- 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
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
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- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
本发明公开一种可变角度空心无头加压螺钉，包括前段螺钉和后段螺钉，前段螺钉和后段螺钉上分别形成有连接头和安装槽，连接头和安装槽能活动连接在一起使得前段螺钉能相对后段螺钉转变角度，连接头的端面上开设有一轴向凹孔，后段螺钉中开设有轴向通孔，轴向通孔能供起子前端上的第一作用部能穿过安装槽并与前段螺钉的轴向凹孔相配合，且同时后段螺钉能与起子的第二作用部相配合，使通过起子能带动前段螺钉和后段螺钉同步转动。本发明的前段螺钉能相对后段螺钉转变角度，通过起子将前段螺钉和后段螺钉分别拧入关节两侧的骨头上进行关节融合手术后，关节是可以在一定范围内转变角度进行活动，进而能提高患者的接骨舒适性。
The present invention discloses a variable angle hollow headless compression screw, comprising a front section screw and a rear section screw, wherein a connecting head and a mounting groove are respectively formed on the front section screw and the rear section screw, wherein the connecting head and the mounting groove can be movably connected together so that the front section screw can change its angle relative to the rear section screw, an axial concave hole is provided on the end surface of the connecting head, and an axial through hole is provided in the rear section screw, wherein the axial through hole can allow a first action part on the front end of a screwdriver to pass through the mounting groove and cooperate with the axial concave hole of the front section screw, and at the same time, the rear section screw can cooperate with the second action part of the screwdriver, so that the screwdriver can drive the front section screw and the rear section screw to rotate synchronously. The front section screw of the present invention can change its angle relative to the rear section screw, and after the front section screw and the rear section screw are respectively screwed into the bones on both sides of the joint by the screwdriver for joint fusion surgery, the joint can change its angle within a certain range for movement, thereby improving the comfort of bone setting for the patient.
Description
Technical Field
The invention relates to the technical field of surgical medical instruments, in particular to a variable-angle hollow headless compression screw.
Background
A headless pressurizing hollow screw 1' (shown in fig. 9) in the prior art is composed of a section of complete screw, is of an integral structure, and cannot be converted into an angle. When bones on both sides of a joint are fractured, joint fusion surgery is usually performed by using headless compression cannulated screws, i.e., the headless compression cannulated screws are inserted into bones on the other side of the joint from bones on one side and penetrate the joint, so that bones on both sides of the joint are connected together by using the headless compression cannulated screws, but the headless compression cannulated screws with an integrated structure can cause the joint to be unable to move after fixing bones on both sides of the joint, and patients feel uncomfortable.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a variable-angle hollow headless pressurizing screw, which mainly solves the technical problems that joints cannot move after bones on two sides of the joints are fixed by adopting the headless pressurizing hollow screw with an existing integrated structure, and patients have uncomfortable feeling and the like.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The utility model provides a hollow headless compression screw of variable angle, including anterior segment screw and back end screw, be formed with connector and mounting groove on anterior segment screw and the back end screw respectively, connector and mounting groove can swing joint be in the same place make anterior segment screw can change the angle relative back end screw, an axial shrinkage pool has been seted up on the terminal surface of connector, axial through-hole has been seted up in the back end screw, axial through-hole can supply the first effect portion on the bottle opener front end can pass the mounting groove and cooperate with the axial shrinkage pool of anterior segment screw, and the back end screw can cooperate with the second effect portion of bottle opener simultaneously, make can drive anterior segment screw and back end screw synchronous rotation through the bottle opener, and then make the joint can move about on the bone of joint both sides is twisted respectively with anterior segment screw and back end screw, in order to improve the coaptation travelling comfort.
Further, a flange part with an outer diameter larger than that of the connector is formed on the end part of the connector, the flange part can be clamped into the mounting groove in an adaptive manner, and an inwardly contracted back-off part is formed at the upper end of the mounting groove so as to limit the flange part in the mounting groove in a movable manner.
Further, the outer diameter of the connector is slightly smaller than the caliber of the back-off part, so that a gap is reserved between the connector and the back-off part to form a yielding space of the connector relative to the conversion angle of the mounting groove.
Further, the inner wall of the mounting groove is provided with a first inclined plane and a second inclined plane which are adjacent to each other, a containing space with a large middle and small two ends is formed in the mounting groove through the matching of the first inclined plane and the second inclined plane, and the flange part can be limited in the containing space and can be converted into an angle relative to the mounting groove through the matching of the first inclined plane and the second inclined plane with the flange part.
Further, the cross sections of the first action part and the second action part of the screwdriver are in a shape of a Chinese character 'yi' or a cross or a hexagon, and the cross sections of the axial concave holes of the front screw are in a shape of a Chinese character 'yi' or a cross or a hexagon which are matched with the first action part of the screwdriver.
Further, the axial through hole of back section screw is the font or cross or hexagon with the second action portion looks adaptation of bottle opener, and when the first action portion of bottle opener inserted into the axial shrinkage pool of anterior segment screw formed spacing cooperation, the second action portion can insert simultaneously and form spacing cooperation in the axial through hole of back section screw, makes can drive anterior segment screw and back section screw synchronous rotation through the bottle opener.
Further, the rear end part of the rear section screw is provided with a matching hole coaxially arranged with the axial through hole, the cross section of the matching hole is in a shape like a Chinese character 'yi' or a cross or a hexagon which is matched with the second action part of the screwdriver, when the first action part of the screwdriver is inserted into the axial concave hole of the front section screw to form limit matching, the second action part can be simultaneously inserted into the matching hole of the rear section screw to form limit matching, so that the front section screw and the rear section screw can be driven to synchronously rotate by the screwdriver.
Further, the outer diameters of the front section screw and the rear section screw are gradually enlarged from the front end to the rear end to form a front small rear large structure.
The variable angle hollow headless compression screw has the following advantages:
The front section screw and the rear section screw are respectively provided with the connector and the mounting groove, the connector and the mounting groove can be movably connected together to enable the front section screw to be capable of being turned into an angle relative to the rear section screw, further the two sections of movably connected split structure are formed, an axial concave hole is formed in the end face of the connector, an axial through hole is formed in the rear section screw, a first action part on the front end of a screwdriver can penetrate the mounting groove and is matched with the axial concave hole of the front section screw, and when the screwdriver is inserted into place, the first action part is matched with the axial concave hole, the rear section screw can be matched with a second action part of the screwdriver at the same time, so that the front section screw and the rear section screw can be driven to synchronously rotate by the screwdriver, and then the front section screw and the rear section screw are respectively screwed into bones on two sides of a joint to enable the joint to move so as to improve bone setting comfort.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is a partial cross-sectional view of fig. 1.
Fig. 3 is a partial enlarged view at a in fig. 2.
Fig. 4 is a schematic view of the structure of the front screw according to the embodiment of the present invention after the front screw is turned relative to the rear screw.
Fig. 5 is a partial cross-sectional view of fig. 4.
Fig. 6 is a partial enlarged view at B in fig. 5.
Fig. 7 is a schematic view showing the structure of bones connected to both sides of a joint according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of the screwdriver.
Fig. 9 is a schematic view of a structure of a hollow headless compression screw of the prior art.
Description of the reference numerals:
1. Front section screw, 2, back section screw, 3, bottle opener, 4, prefabricated hole, 11, connector, 21, mounting groove, 22, axial through-hole, 23, mating hole, 31, first effect portion, 32, second effect portion, 111, axial shrinkage pool, 112, flange portion, 211, back-off portion, 212, first inclined plane, 213, second inclined plane.
Detailed Description
The invention is further described below with reference to the drawings and examples.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 8, in the present embodiment, a variable angle hollow headless compression screw includes a front screw 1 and a rear screw 2, wherein a connector 11 and a mounting groove 21 are formed on the front screw 1 and the rear screw 2 respectively, the connector 11 and the mounting groove 21 can be movably connected together to enable the front screw 1 to be turned to an angle relative to the rear screw 2, an axial concave hole 111 is formed on an end surface of the connector 11, an axial through hole 22 is formed in the rear screw 2, a first acting portion 31 on a front end of a screwdriver 3 can pass through the mounting groove 21 and be matched with the axial concave hole 111 of the front screw 1, and meanwhile, the rear screw 2 can be matched with a second acting portion 32 of the screwdriver 3, so that the front screw 1 and the rear screw 2 can be driven to rotate synchronously by the screwdriver 3, and then the front screw 1 and the rear screw 2 can be screwed into bones on two sides of a joint respectively to enable the joint to move so as to improve bone setting comfort.
In this embodiment, the front section screw 1 and the rear section screw 2 are respectively formed with a connector 11 and a mounting groove 21, the connector 11 and the mounting groove 21 can be movably connected together to enable the front section screw 1 to be turned into an angle relative to the rear section screw 2, and further form a split structure with two sections being movably connected, an axial concave hole 111 is formed in the end face of the connector 11, an axial through hole 22 is formed in the rear section screw 2, a first acting portion 31 on the front end of the screwdriver 3 can pass through the mounting groove 21 and be matched with the axial concave hole 111 of the front section screw 1, and when the first acting portion 31 is matched with the axial concave hole 111 after the screwdriver 3 is inserted in place, the rear section screw 2 can be simultaneously matched with a second acting portion 32 of the screwdriver 3, so that the front section screw 1 and the rear section screw 2 can be driven to synchronously rotate by the screwdriver 3. When the variable angle hollow headless compression screw of this embodiment is used for joint fusion surgery, firstly, a preformed hole 4 penetrating through the joint and extending to the bone at the other side of the joint is drilled on the bone at one side of the joint (the drilling process is a conventional technical means in joint fusion surgery, the specific drilling method is not repeated here), then a first acting part 31 on the front end of a screwdriver 3 is extended into an axial through hole 22 of the section screw 2 until the first acting part 31 penetrates out of the rear section screw 2 and is inserted into an axial concave hole 111 of the front section screw 1 from a mounting groove 21 to form limit fit, meanwhile, the rear section screw 2 also forms limit fit with a second acting part 32 of the screwdriver 3, at this time, the front section screw 1 and the rear section screw 2 are linear, under the driving of the screwdriver 3, the front section screw 1 and the rear section screw 2 can be screwed in from the opening of the preformed hole 4, and the front section screw 1 and the rear section screw 2 are respectively connected to the bone at the two sides of the joint, as the front section screw 1 and the rear section screw 2 are movably connected together through the connector 11 and the mounting groove 21, the variable angle hollow compression screw can be carried out in the range of the joint fusion surgery, thereby the patient can change the comfort after the joint fusion surgery.
Referring to fig. 1 to 6, in the present embodiment, preferably, a flange portion 112 having an outer diameter larger than that of the connector 11 is formed at an end portion of the connector 11, the flange portion 112 is capable of being fittingly engaged into the mounting groove 21, and an inwardly contracted back-off portion 211 is formed at an upper end of the mounting groove 21 to movably limit the flange portion 112 in the mounting groove 21. In this embodiment, preferably, the outer diameter of the connector 11 is slightly smaller than the caliber of the back-off portion 211, so that a gap is left between the connector 11 and the back-off portion 211 to form a space for giving up the transformation angle of the connector 11 relative to the mounting groove 21. In this embodiment, preferably, the inner wall of the mounting groove 21 is provided with a first inclined plane 212 and a second inclined plane 213 adjacent to each other, a receiving space with a large middle and a small two ends is formed in the mounting groove 21 by matching the first inclined plane 212 and the second inclined plane 213, and the flange 112 can be limited in the receiving space and can be turned by an angle relative to the mounting groove 21 by matching the first inclined plane 212 and the second inclined plane 213 with the flange 112.
Referring to fig. 1 to 8, in the present embodiment, the cross sections of the first acting portion 31 and the second acting portion 32 of the screwdriver 3 are in a shape of a straight line or a cross or a hexagon, the first acting portion 31 and the second acting portion 32 are connected by an extension rod, and the cross section of the axial concave hole 111 of the front screw 1 is in a shape of a straight line or a cross or a hexagon which is matched with the first acting portion 31 of the screwdriver 3. In this embodiment, preferably, the axial through hole 22 of the rear screw 2 is in a shape of a straight line or a cross or a hexagon which is matched with the second acting portion 32 of the screwdriver 3, when the first acting portion 31 of the screwdriver 3 is inserted into the axial concave hole 111 of the front screw 1 to form a limit fit, the second acting portion 32 can be simultaneously inserted into the axial through hole 22 of the rear screw 2 to form a limit fit, so that the front screw 1 and the rear screw 2 can be driven to synchronously rotate by the screwdriver 3. In this embodiment, preferably, the cross sections of the axial through hole 22 of the rear screw 2 and the second acting portion 32 of the driver 3 are in a mutually matched hexagon, while the cross sections of the axial concave hole 111 of the front screw 2 and the first acting portion 31 on the front end of the driver 3 are also in a mutually matched hexagon, so that when the driver 3 is inserted in place, the first acting portion 31 of the driver 3 is matched with the axial concave hole 111 of the front screw 1, and meanwhile, the second acting portion 32 of the driver 3 is matched with the axial through hole 22 of the rear screw 2, and when the driver 3 is rotated, the driver can drive the front screw 1 and the rear screw 2 to synchronously rotate through the first acting portion 31 and the second acting portion 32. However, it will be understood by those skilled in the art that in other embodiments, the cross-section of the first acting portion 31 and the second acting portion 32 of the driver 3 may have other non-circular structures, such as a circular notched structure, an oval structure, a trapezoid structure, etc., so long as the first acting portion 31 on the front end of the driver 3 and the second acting portion 32 on the extension rod of the driver 3 can form a limit fit with the axial recess hole 111 on the front screw 1 and the axial through hole 22 in the rear screw 2, respectively, so as to drive the front screw 1 and the rear screw 2 to rotate synchronously when the driver 3 is inserted into the rear screw 2.
Further, in the present embodiment, the size of the inside of the axial concave hole 111 of the front screw 1 may be smaller than the aperture of the axial through hole 22 of the rear screw 2 so as to facilitate insertion of the driver 3 into the rear screw 2 and to align the first acting portion 31 on the front end of the driver 3 with the insertion into the axial concave hole 111 of the front screw 1. However, it will be understood by those skilled in the art that in other embodiments, the axial recess 111 may be the same size as the axial through hole 22, but in the case that the cross section of the axial recess 111 is the same as that of the axial through hole 22, the hole size of the axial recess 111 should not be larger than that of the axial through hole 22, otherwise it may result in that the driver 3 cannot be inserted in place, and thus the front screw 1 and the rear screw 2 cannot be rotated into the bone simultaneously.
Referring to fig. 1 and 2, in the present embodiment, the outer diameters of the front screw 1 and the rear screw 2 gradually increase from the front end to the rear end to form a front small and rear large structure.
In addition, in other embodiments, the rear end portion of the rear screw 2 may be provided with a mating hole 23 coaxially disposed with the axial through hole 22, and the cross section of the mating hole 23 is in a shape of a line or a cross or a hexagon that is adapted to the second action portion 32 of the screwdriver 3, so that when the first action portion 31 of the screwdriver 3 is inserted into the axial concave hole 111 of the front screw 1 to form a limit fit, the second action portion 32 can be simultaneously inserted into the mating hole 23 of the rear screw 2 to form a limit fit, so that the front screw 1 and the rear screw 2 can be driven to rotate synchronously by the screwdriver 3.
The embodiments are merely illustrative of the technical solution of the present invention, and not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and therefore all other embodiments obtained by those skilled in the art without making creative efforts are intended to fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a hollow headless compression screw of variable angle which characterized in that: comprises a front section screw (1) and a rear section screw (2), wherein a connector (11) and a mounting groove (21) are respectively formed on the front section screw (1) and the rear section screw (2), the connector (11) and the mounting groove (21) can be movably connected together so that the front section screw (1) can be converted into an angle relative to the rear section screw (2), an axial concave hole (111) is formed on the end face of the connector (11), an axial through hole (22) is formed in the rear section screw (2), the axial through hole (22) can be used for enabling a first action part (31) on the front end of the screwdriver (3) to pass through the mounting groove (21) and be matched with an axial concave hole (111) of the front screw (1), and meanwhile, the rear screw (2) can be matched with a second action part (32) of the screwdriver (3), so that the front screw (1) and the rear screw (2) can be driven to synchronously rotate by the screwdriver (3), and further the front screw (1) and the rear screw (2) are respectively screwed into bones on two sides of a joint to enable the joint to move so as to improve bone setting comfort;
a flange part (112) with the outer diameter larger than that of the connector (11) is formed on the end part of the connector (11), the flange part (112) can be adaptively clamped into the mounting groove (21), and an inwardly contracted back-off part (211) is formed at the upper end of the mounting groove (21) so as to movably limit the flange part (112) in the mounting groove (21);
The outer diameter of the connector (11) is slightly smaller than the caliber of the back-off part (211), so that a gap is reserved between the connector (11) and the back-off part (211) to form a yielding space for the connector (11) to change angles relative to the mounting groove (21);
The inner wall of the mounting groove (21) is provided with a first inclined plane (212) and a second inclined plane (213) which are adjacent to each other, a containing space with a large middle and small two ends is formed in the mounting groove (21) through the matching of the first inclined plane (212) and the second inclined plane (213), and the flange part (112) can be limited in the containing space and can be turned by an angle relative to the mounting groove (21) through the matching of the first inclined plane (212) and the second inclined plane (213) and the flange part (112).
2. The variable angle cannulated headless compression screw of claim 1, wherein: the cross sections of the first action part (31) and the second action part (32) of the screwdriver (3) are in a shape of a Chinese character 'yi' or a cross or a hexagon, and the cross section of the axial concave hole (111) of the front screw (1) is in a shape of a Chinese character 'yi' or a cross or a hexagon which is matched with the first action part (31) of the screwdriver (3).
3. The variable angle cannulated headless compression screw of claim 2, wherein: the axial through hole (22) of back section screw (2) is the one font or cross or hexagonal with the second action portion (32) looks adaptation of bottle opener (3), when first action portion (31) of bottle opener (3) inserts in axial shrinkage pool (111) of anterior segment screw (1) and forms spacing cooperation, second action portion (32) can insert simultaneously in axial through hole (22) of back section screw (2) and form spacing cooperation, makes can drive anterior segment screw (1) and back section screw (2) synchronous rotation through bottle opener (3).
4. The variable angle cannulated headless compression screw of claim 2, wherein: the screw is characterized in that a matching hole (23) which is coaxially arranged with the axial through hole (22) is formed in the rear end part of the rear-section screw (2), the cross section of the matching hole (23) is in a shape like a Chinese character 'yi' or a cross or a hexagon which is matched with a second action part (32) of the screw driver (3), when a first action part (31) of the screw driver (3) is inserted into an axial concave hole (111) of the front-section screw (1) to form limit matching, the second action part (32) can be simultaneously inserted into the matching hole (23) of the rear-section screw (2) to form limit matching, so that the screw driver (3) can drive the front-section screw (1) and the rear-section screw (2) to synchronously rotate.
5. The variable angle cannulated headless compression screw of claim 1, wherein: the outer diameters of the front section screw (1) and the rear section screw (2) are gradually enlarged from the front end to the rear end to form a front small and rear large structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910958479.2A CN110559069B (en) | 2019-10-10 | 2019-10-10 | A variable angle hollow headless compression screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910958479.2A CN110559069B (en) | 2019-10-10 | 2019-10-10 | A variable angle hollow headless compression screw |
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| Publication Number | Publication Date |
|---|---|
| CN110559069A CN110559069A (en) | 2019-12-13 |
| CN110559069B true CN110559069B (en) | 2024-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910958479.2A Active CN110559069B (en) | 2019-10-10 | 2019-10-10 | A variable angle hollow headless compression screw |
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| CN (1) | CN110559069B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210990669U (en) * | 2019-10-10 | 2020-07-14 | 厦门中科兴医疗器械有限公司 | Variable angle hollow headless compression screw |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7951198B2 (en) * | 2005-05-10 | 2011-05-31 | Acumed Llc | Bone connector with pivotable joint |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210990669U (en) * | 2019-10-10 | 2020-07-14 | 厦门中科兴医疗器械有限公司 | Variable angle hollow headless compression screw |
Also Published As
| Publication number | Publication date |
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| CN110559069A (en) | 2019-12-13 |
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