CN109199650B - Tumor type knee joint prosthesis - Google Patents
Tumor type knee joint prosthesis Download PDFInfo
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- CN109199650B CN109199650B CN201811176265.1A CN201811176265A CN109199650B CN 109199650 B CN109199650 B CN 109199650B CN 201811176265 A CN201811176265 A CN 201811176265A CN 109199650 B CN109199650 B CN 109199650B
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- tibia
- knee joint
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- joint prosthesis
- tumor
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- 206010028980 Neoplasm Diseases 0.000 title claims abstract description 23
- 210000000629 knee joint Anatomy 0.000 title claims abstract description 23
- 210000002303 tibia Anatomy 0.000 claims abstract description 44
- 210000000689 upper leg Anatomy 0.000 claims abstract description 15
- 241001272720 Medialuna californiensis Species 0.000 claims description 7
- 239000002861 polymer material Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 210000000988 bone and bone Anatomy 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 208000003076 Osteolysis Diseases 0.000 description 2
- 208000029791 lytic metastatic bone lesion Diseases 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 210000001694 thigh bone Anatomy 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30471—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a tumor type knee joint prosthesis, which comprises: the femur part is connected with the tibia liner through a hinge, and the femur part performs rotary motion on the tibia liner by taking the hinge as a center. The tibia liner is connected with the tibia part through a third bulge below the tibia liner and a third groove of the tibia part. The extension stem is connected with the femoral component or the tibial component through a taper connection and an interference fit. The invention discloses a method for firmly locking an extension handle and a femoral part or a tibial part, and avoiding the situations of stress deformation and fracture of a connecting piece. It is another object of the present invention to extend the length of the stem once locked with the femoral or tibial portion without relative movement between the components or the generation of wear debris, avoiding bone dissolution.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a tumor type knee joint prosthesis.
Background
The prosthesis, which is called a prosthesis in medicine, is a medical appliance for replacing certain limb and organ tissues of a human body. The artificial prosthesis is a substitute for the artificial prosthesis damaged by the causes of arthritis and the like, is an artificial model, mainly comprises special metals such as titanium, cobalt-chromium alloy and the like, and special materials such as ceramics, high polymer materials and the like, is never allowed to generate side effects and corrosion after being transplanted on a human body, is required to have high strength and durability, and is a high-tech precise medical product.
The tumor type knee joint prosthesis consists of a joint part and an extension handle inserted into a medullary cavity. The joint part of the traditional tumor type knee joint prosthesis is fixed with the extension handle by adopting a conical connection and a pin. The simple conical connection is easy to cause axial dislocation between the extension handle and the joint part.
If the pin is additionally arranged at the conical connecting part for fixation, under the condition that the tumor type knee joint prosthesis is subjected to axial load, the pin can generate shearing force action, and the pin can bend, deform or even break under the action of long-term shearing force. Relative movement between the pin and the elongate shaft and joint area can cause wear on the prosthesis and wear debris can cause osteolysis. The structure of the tapered connection dowel locking has higher requirements on the dimensional accuracy of hole positions of the extension handle and the joint part, and if the hole positions are not accurate enough, the extension handle is easy to loosen or cannot be assembled with the joint part.
Disclosure of Invention
The invention provides a tumor type knee joint prosthesis for solving the technical defects at present, which can firmly lock an extension handle and a femoral part or a tibial part and avoid the conditions of stress deformation and fracture of a connecting piece.
It is another object of the present invention to extend the length of the stem once locked with the femoral or tibial portion without relative movement between the components or the generation of wear debris, avoiding bone dissolution.
The technical scheme provided by the invention is as follows: a tumor-type knee joint prosthesis comprising:
a femoral component;
one end of the tibia part is hinged with one end of the femur part;
the two fixing grooves are respectively and coaxially arranged at the other ends of the tibia part and the femur part, the bottoms of the fixing grooves are provided with conical grooves, and the radiuses of the conical grooves are gradually increased along the direction from the opening to the bottom;
the extension handle is provided with a conical head at one end, the conical head is matched in the fixing groove, the conical head is of a hollow structure and is provided with an opening, and a baffle flap is arranged at the opening;
the elongate handle further comprises:
the jackscrew is coaxially arranged in the conical head, one end of the jackscrew abuts against the baffle flap, the other end of the jackscrew is provided with a spiral hole, and an internal thread is arranged in the spiral hole;
the accommodating cavity is coaxially arranged in the extension handle and communicated with the interior of the conical head; a first through hole and a first groove are oppositely arranged on the side surface of the accommodating cavity;
the first bevel gear is coaxially arranged in the accommodating cavity, a first shaft is sleeved at the center of the first bevel gear, and the outer wall of the first shaft is provided with an external thread and matched in the spiral hole;
the second bevel gear is meshed with the first bevel gear, a second shaft is arranged at the center of one end of the second bevel gear, the second shaft is transversely arranged in the accommodating cavity, and the tail end of the second shaft is matched in the first groove;
and the first bulge is coaxially arranged at the other end of the bevel gear and is positioned in the first through hole, and a rotating hole is formed in the center of the first bulge.
Preferably, the first and second sensors are, preferably,
the two bosses are oppositely arranged at the hinged end of the femoral part, and a second groove is formed in the middle of each boss;
the two second through holes are formed in the boss of the femoral part and communicated with the second grooves;
the tibia liner is fixedly connected with the tibia part on one side, a second bulge is arranged in the center of the surface of the other side of the tibia liner, the second bulge is arranged in the second groove, and a third through hole is formed in the center of the second bulge;
and the hinge is arranged in the second through hole and penetrates through the third through hole.
It is preferable that the first and second liquid crystal layers are formed of,
a second groove is coaxially formed in one end of the tibia part;
a third bulge is arranged in the center of one side surface of the tibial gasket;
wherein the third protrusion is in interference fit with the second groove.
Preferably, the method further comprises the following steps:
and the fixing ring is arranged at the first through hole and used for fixing the first bulge.
It is preferable that the first and second liquid crystal layers are formed of,
two ends of the second bulge of the tibia liner are symmetrically provided with half-moon grooves;
the outer surface of the boss is a circular arc and is matched in the half-moon groove.
It is preferable that the first and second liquid crystal layers are formed of,
the lateral surface of the tibia portion is provided with a plurality of suture holes.
It is preferable that the first and second liquid crystal layers are formed of,
the tibia liner is made of high polymer materials.
It is preferable that the first and second liquid crystal layers are formed of,
the tibia portion and the femur portion are both made of alloy materials.
The invention has the following beneficial effects: according to the tumor type knee joint prosthesis provided by the invention, locking is completed between the femur part or the tibia part and the extension handle in an interference manner and in a tapered fit manner, locking is firm, and the conditions of stress deformation and fracture of a connecting piece do not exist; once the extension handle and the femoral part or the tibial part are locked, relative movement among the parts can not occur, no abrasion debris is generated, and the phenomenon of osteolysis can not be caused; the femur part is connected with the tibia liner through the hinge, and the femur part rotates on the tibia liner by taking the hinge as a center, so that the movement is more flexible.
Drawings
Fig. 1 is an overall structural view of a tumor-type knee joint prosthesis according to the present invention.
Fig. 2 is a structural view of a joint between a tibia and a femur of the tumor-type knee joint prosthesis of the present invention.
Fig. 3 is an exploded view of the femoral component of the present invention in connection with a tibial insert.
Fig. 4 is an internal view of the tibia portion according to the present invention.
Fig. 5 is an external view of the tibial portion of the present invention.
Fig. 6 is a block diagram of the tibial insert of the present invention.
Fig. 7 is a structural view of the extension handle of the present invention.
Fig. 8 is a lateral side view of a tibia of the present invention.
FIG. 9 is a view showing a structure of a second bevel gear according to the present invention.
Fig. 10 is a structural view of a fixing ring of the present invention.
Fig. 11 is a cross-sectional view of the connection of the elongate stem and the tibial portion of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1-2, the present invention provides a tumor-type knee joint prosthesis, which mainly comprises a tibial part 100, a femoral part 200, a tibial pad 400 and an extension stem 300, wherein one ends of the tibial part 100 and the femoral part 200 are hinged through the tibial pad 400. An extension stem 300 is coaxially fixed to the other ends of the tibia portion 100 and the femur portion 200, respectively.
As shown in fig. 4, the connection relationship between the tibia portion 100 and the extension shaft 300 will be described as an example. A fixing groove 110 is coaxially arranged on the end surface of the other end of the tibia portion 100, a tapered groove 120 is arranged at the bottom of the fixing groove 110, the radius of the tapered groove 120 is gradually increased from the opening to the bottom, the section of the longitudinal axis of the tapered groove 120 is trapezoidal, and the connecting part of the tapered groove 120 and the fixing groove 110 is the position with the smallest radius.
As shown in fig. 7, the extension handle 300 has a conical head 310 at one end, the radius of the conical head 310 is gradually reduced in the extension direction (the radius is reduced toward both ends), and the conical head 310 is fitted into the fixing groove 110. The cone head 310 is a hollow structure and has an opening, the opening is located at the outer end (one end of the extension handle 300), the cone head 310 at the opening is provided with a baffle flap 311, and the baffle flap 311 uniformly surrounds the opening to shield the opening. A top thread 312 is coaxially arranged inside the conical head 310, one end of the top thread 312 abuts against the baffle flap 311, and the other end of the top thread has a spiral hole. The cone head 310 and the baffle flap 311 are integrally formed by machining, and the 312 jackscrew extrudes the baffle flap 311 when moving upwards, so that the baffle flap 311 deforms under stress and expands outwards, and the extension rod is axially fixed.
The receiving chamber 320 is coaxially disposed within the extension handle 300 in communication with the interior of the bit 310. A first through hole 321 and a first groove 322 are oppositely disposed at a side of the receiving chamber 320. A fixing ring 325 is provided at the first through hole 321, and the structure thereof is shown in fig. 10. A first bevel gear 323 is coaxially arranged in the accommodating cavity 320, a first shaft 324 is fixed at the center, an external thread is arranged on the outer surface of the first shaft 324, and the first shaft is matched in the spiral hole and matched with an internal thread arranged in the spiral hole to form a screw rod structure. The second bevel gear 326 is engaged with the first bevel gear 323, and as shown in fig. 9, a second shaft 327 is fixed at the center of the second bevel gear 326, extends on one side of the second bevel gear 326, and is transversely disposed in the accommodating chamber 320, and the other end is matched in the first groove 322. The other side of the center of the second bevel gear 326 is provided with a first protrusion 328, the first protrusion 328 is fixed by a fixing ring 325, the center of the first protrusion 328 is provided with a rotating hole 329, the rotating hole 329 is a hexagonal hole, the first protrusion can be inserted into the rotating hole 329 through a screwdriver to rotate the second bevel gear 326, so as to drive the first bevel gear 323 to rotate, the first bevel gear 323 drives the jackscrew 321 to upwards perform spiral rotation, the conical head 310 is extruded, the baffle plate 311 is extruded and deformed to expand around, and the baffle plate 311 is locked by interference fit with the tibia portion 100.
As shown in fig. 3 and 8, the hinge end of the femoral component 200 has two bosses 210, the outer surface of the boss 210 is contoured to be a cambered surface structure, a second groove 220 is formed between the two bosses 210, and a second through hole 211 is formed in the boss 210 and communicates with the second groove 220.
As shown in FIG. 6, the tibial insert 400 has a second protrusion 410 and a third protrusion 430 respectively disposed at the center of two sides. The side of the second protrusion 410 is provided with a third through hole 411, the third protrusion 410 is matched in the second groove 220, the second through hole 211 is communicated with the third through hole 411, a rotatable hinge 230 is arranged in the second protrusion, two ends of the hinge 230 extend to the outside, and two ends of the hinge are provided with sleeves 231. As shown in fig. 5, a third groove 130 is formed in the center of the end surface of the articulating end of the tibia portion 100, and the third protrusion 430 is of a vertebral body structure, matches with the third groove 130, and is in an interference fit.
The two ends of the second bulge 410 of the tibial gasket 400 are symmetrically provided with half-moon grooves 420; the outer surface of boss 210 is rounded to fit within the half-moon groove 420. As femoral component 200 rotates about the hinge, boss 210 rotates within half-moon groove 420.
Similarly, the connection between the femoral component 200 and the elongate stem 300 is identical in structure and operation to the connection between the tibial component 100 and the elongate stem 300.
As shown in FIG. 5, a plurality of suture holes 140 are provided in the outer surface of the femoral component 100 for suturing soft tissue. Femoral component 100 femoral component 200 and extension stem 300 are made of an alloy material, and tibial insert 400 is made of a polymer material.
In the invention, the femur part and the tibia liner are connected through the hinge, and the femur part rotates on the tibia liner by taking the hinge as a center. The tibia liner is connected with the tibia part through a third bulge below the tibia liner and a third groove of the tibia part. As shown in fig. 11, the elongate shaft is connected to the femoral or tibial component by a tapered connection and an interference fit. Insert the screwdriver in the hexagonal rotating hole of second bevel gear, rotate second bevel gear, second bevel gear drives first bevel gear and rotates, and first bevel gear drives the jackscrew and is ascending screw motion, and the in-process of jackscrew upward movement can extrude the conical head of extension handle, and the conical head is squeezed the deformation and is expanded all around, forms interference fit with the bell mouth of thighbone portion or shin bone portion. The femoral part or the tibial part and the extension handle are locked in an interference mode and in a tapered fit mode.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A tumor-type knee joint prosthesis, comprising:
a femoral component;
a tibia part, one end of which is hinged with one end of the femur part;
the two fixing grooves are respectively and coaxially arranged at the other ends of the tibia part and the femur part, the bottoms of the fixing grooves are provided with conical grooves, and the radiuses of the conical grooves are gradually increased along the direction from the opening to the bottom;
the extension handle is provided with a conical head at one end, the conical head is matched in the fixing groove, the conical head is of a hollow structure and is provided with an opening, and a baffle flap is arranged at the opening;
the elongate handle further comprises:
the jackscrew is coaxially arranged in the conical head, one end of the jackscrew abuts against the baffle flap, the other end of the jackscrew is provided with a spiral hole, and an internal thread is arranged in the spiral hole;
the accommodating cavity is coaxially arranged in the extension handle and communicated with the interior of the conical head; a first through hole and a first groove are oppositely arranged on the side surface of the accommodating cavity;
the first bevel gear is coaxially arranged in the accommodating cavity, a first shaft is sleeved at the center of the first bevel gear, and the outer wall of the first shaft is provided with an external thread and matched in the spiral hole;
the second bevel gear is meshed with the first bevel gear, a second shaft is arranged at the center of one end of the second bevel gear, the second shaft is transversely arranged in the accommodating cavity, and the tail end of the second shaft is matched in the first groove;
and the first bulge is coaxially arranged at the other end of the second bevel gear and is positioned in the first through hole, and a rotating hole is formed in the center of the first bulge.
2. The tumor-type knee joint prosthesis of claim 1, further comprising:
the two bosses are oppositely arranged at the hinged end of the femoral part, and a second groove is formed in the middle of each boss;
the two second through holes are formed in the boss of the femoral part and communicated with the second grooves;
the tibia liner is fixedly connected with the tibia part on one side, a second bulge is arranged in the center of the surface of the other side of the tibia liner, the second bulge is arranged in the second groove, and a third through hole is formed in the center of the second bulge;
and the hinge is arranged in the second through hole and penetrates through the third through hole.
3. The tumor-type knee joint prosthesis according to claim 2,
a third groove is coaxially formed in one end of the tibia part;
a third bulge is arranged in the center of one side surface of the tibial gasket;
wherein the third protrusion is in interference fit with the third groove.
4. The tumor-type knee joint prosthesis of claim 3, further comprising:
and the fixing ring is arranged at the first through hole and used for fixing the first bulge.
5. The tumor-type knee joint prosthesis according to claim 4,
two ends of the second bulge of the tibia liner are symmetrically provided with half-moon grooves;
the outer surface of the boss is a circular arc and is matched in the half-moon groove.
6. The tumor-type knee joint prosthesis according to claim 1,
the lateral surface of the tibia portion is provided with a plurality of suture holes.
7. The tumor-type knee joint prosthesis according to claim 1,
the rotating hole is a hexagonal hole.
8. The tumor-type knee joint prosthesis according to claim 2,
sleeves are arranged at two ends of the hinge.
9. The tumor-type knee joint prosthesis according to claim 8,
the tibia liner is made of high polymer materials.
10. The tumor-type knee joint prosthesis according to claim 8,
the tibia portion and the femur portion are both made of alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176265.1A CN109199650B (en) | 2018-10-10 | 2018-10-10 | Tumor type knee joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176265.1A CN109199650B (en) | 2018-10-10 | 2018-10-10 | Tumor type knee joint prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109199650A CN109199650A (en) | 2019-01-15 |
| CN109199650B true CN109199650B (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811176265.1A Active CN109199650B (en) | 2018-10-10 | 2018-10-10 | Tumor type knee joint prosthesis |
Country Status (1)
| Country | Link |
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| CN (1) | CN109199650B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113974917A (en) * | 2021-11-16 | 2022-01-28 | 北京大学人民医院 | Tumor type artificial knee joint with double shafts capable of being automatically lengthened |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3840469A1 (en) * | 1988-12-01 | 1990-06-07 | Lieke Michael | Anchorage components for endoprostheses |
| GB9201231D0 (en) * | 1992-01-21 | 1992-03-11 | Howmedica | Tibial element for a replacement knee prosthesis |
| US5489311A (en) * | 1994-01-21 | 1996-02-06 | Joint Medical Products Corporation | Prosthesis with orientable bearing surface |
| CN201264048Y (en) * | 2008-09-25 | 2009-07-01 | 洛阳轴研科技股份有限公司 | Crown cage turned pocket simple mould |
| CN201474826U (en) * | 2009-06-24 | 2010-05-19 | 浙江双富电力设备有限公司 | Vane and vane arm self-expanding quick release pin assembly |
| CA2850812A1 (en) * | 2011-10-04 | 2013-04-11 | Kfx Medical Corporation | Dual expansion anchor |
| CN202468640U (en) * | 2011-12-30 | 2012-10-03 | 东莞地龙纸业有限公司 | Self-locking check bolt |
| CN206167123U (en) * | 2016-07-28 | 2017-05-17 | 北京力达康科技有限公司 | Keep nodal section type that closes matched stack formula thighbone tumour knee joint prosthesis |
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2018
- 2018-10-10 CN CN201811176265.1A patent/CN109199650B/en active Active
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