CN203408131U - Hip joint femoral component prosthesis - Google Patents
Hip joint femoral component prosthesis Download PDFInfo
- Publication number
- CN203408131U CN203408131U CN201320494036.0U CN201320494036U CN203408131U CN 203408131 U CN203408131 U CN 203408131U CN 201320494036 U CN201320494036 U CN 201320494036U CN 203408131 U CN203408131 U CN 203408131U
- Authority
- CN
- China
- Prior art keywords
- femoral
- neck
- femoral component
- stem
- far
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
-
- 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
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (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 utility model relates to a hip joint femoral component prosthesis. The hip joint femoral component prosthesis comprises a head neck (1), a neck collar (3), a femoral component proximal end (4) and a femoral component distal end (5), and is characterized in that the front side surface and the rear side surface of the femoral component proximal end (4) are planes, and other parts are interference-free curved surface; the femoral component distal end (5) is cylindrical, two symmetrical planes (6) are arranged on the femoral component distal end (5), the tail end of the femoral component distal end (5) is of a semispherical structure, and the femoral component distal end (5) is a porous tantalum part; the neck collar (3) is a movable neck collar equipped with a special nut (2), a spherical concave surface (9) is arranged on the upper part of the neck collar (3), and a key slot type through hole (8) is formed in the middle of the spherical concave surface (9); the lower end of the special nut (2) has a spherical surface structure, and the diameter of the spherical surface is equal to that of the spherical concave surface (9) on the movable neck collar; a hollowed through hole (10) is formed in the femoral component proximal end (4). The hip joint femoral component prosthesis is simple and reasonable in structure, realizes the simulation of physiological force distribution, and also has excellent biocompatibility.
Description
Technical field
This utility model relates to the artificial joint in medical science bone displacement fields of implantation, relates in particular to a kind of femoral hip stem prosthesis.
Background technology
In prior art, with the femoral hip stem prosthesis of neck neck, in application, exist and be difficult to mate with femur osteotomy surface, be difficult to fixing with femur and easily occur loosening; The type femoral bone end prosthesis and the pulp cavity that mate femoral bone cavitas medullaris are completely interfered, femur bears gravity and is difficult to equilibrium, and existing femoral hip stem prosthesis is generally made by titanium alloy, its biocompatibility is poor, long-time use is rear and thereby tissue there will be repulsion to affect its service life, increase the turnover rate of femoral stem, be difficult to meet modern environmental protection concept.
Utility model content
The purpose of this utility model is to provide a kind of femoral hip stem prosthesis, and this femoral hip stem prosthesis is simple and reasonable, realizes the simulation to physiology distribution of force, has good biocompatibility concurrently.
The purpose of this utility model is achieved in that
A kind of femoral hip stem prosthesis, it includes head and neck, neck neck, femoral stem near-end and femoral stem far-end, it is characterized in that: described femoral stem near-end and described femoral stem far-end design according to femur cavitas medullaris shape, its femoral stem near-end is part matched, and before and after it, two sides are plane, and other parts are without interfering curved surface with coupling pulp cavity, its femoral stem far-end is cylindrical, and which is provided with two symmetrical planes, its end is hemispherical dome structure, and this femoral stem far-end is set to porous tantalum product; Described neck neck is for disposing the movable neck neck of specialized nut, and its top is provided with spherical concave surface, in the middle of this spherical concave surface, is provided with a key-way shape through hole; Described specialized nut lower end is spherical structure, and its spherical diameter is identical with the spherical concave surface on movable neck neck; On described femoral stem near-end, be provided with the through hole of hollow out, with weight reduction, enlarge active surface.
Above-mentioned femoral stem far-end is set to porous tantalum product, and its porosity is 60～70%.This porous tantalum product can adopt the preparations such as foam dipping method, die pressing.Through the discovery that studies for a long period of time: the femoral stem far-end that adopts porous tantalum product to do, can make bone this femoral hip stem prosthesis of growing into, and the structure of growing in forming, organically combine as a whole with body bone tissue, when greatly having improved biocompatibility, also well meet its mechanical property, improved service life and implanted comfort level, increased stability and anti-verticity after prosthese is implanted.
Above-mentioned head and neck and above-mentioned femoral stem near-end are that medical metal is one-body molded, and realize and being fixedly connected with of above-mentioned femoral stem far-end through welding.Its connected mode is solid and reliable.
On the upper surface of above-mentioned specialized nut, be evenly equipped with four blind cylindrical hole, to be mainly used to rotate this specialized nut.
The radius of the end hemispherical dome structure of above-mentioned femoral stem far-end is identical with the radius of columniform femoral stem far-end, and this structure is more reasonable.
The utlity model has following beneficial effect:
This femoral hip stem prosthesis has been set up loose structure, the structure of growing in can forming, organically combine as a whole with body bone tissue, and by rationally determining coupling section and adopting movable neck neck Adaptive matching, the power that makes femoral stem be delivered to femur approaches physiology distribution of force, realize the simulation to physiology distribution of force, had good biocompatibility concurrently.In addition it is simple and reasonable, connects compactness reliable, and processability is good, and production cost is lower, and fitting operation is convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of femoral hip stem prosthesis described in this utility model embodiment 1.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is that the axle of femoral hip stem prosthesis described in this utility model embodiment 1 is surveyed view.
Fig. 5 is the B-B cutaway view of Fig. 1.
Fig. 6 is the C-C cutaway view of Fig. 1.
Fig. 7 is the structural representation of the movable neck neck of femoral hip stem prosthesis described in this utility model embodiment 1.
Fig. 8 is the structural representation of the specialized nut of femoral hip stem prosthesis described in this utility model embodiment 1.
The specific embodiment
Be below this utility model preferred embodiment, and be not intended to limit protection domain of the present utility model.
As shown in accompanying drawing 1～8: a kind of femoral hip stem prosthesis, it includes screwed head and neck 1, movable neck neck 3, femoral stem near-end 4 and femoral stem far-end 5; This femoral stem near-end 4 and femoral stem far-end 5 design according to femur cavitas medullaris shape, its femoral stem near-end 4 is part matched, before and after it, two sides are smooth flat, other parts are without interfering curved surface with coupling pulp cavity, its femoral stem far-end 5 is one cylindrical, on this cylinder, be arranged with two planes 6, the end of this femoral stem far-end 5 is the hemispherical dome structure that Radius is identical with this cylindrical radius, its femoral stem far-end 5 is for adopting the standby porous tantalum product of foam dipping legal system one-body molded, and its porosity is 60～70%; Its head and neck 1 and femoral stem near-end 4 are that medical titanium alloy is one-body molded, and realize and being fixedly connected with of femoral stem far-end 5 through welding, and on femoral stem near-end 4, be provided with two of hollow out for one of bar shaped is leg-of-mutton three through holes 10, to alleviate prosthese overall weight, enlarge active surface; Movable neck neck 3 disposes specialized nut 2, and its top is provided with spherical concave surface 9, is provided with a key-way shape through hole 8, with Matching installation head and neck 1 in the middle of this spherical concave surface 9; These specialized nut 2 lower ends are spherical structure, and its spherical diameter is identical with the spherical concave surface 9 on movable neck neck 3, and on the upper surface of this specialized nut 2, are evenly equipped with four blind cylindrical hole 7, to be mainly used to rotate this specialized nut 2.
During use, adopt conventional method that this femoral hip stem prosthesis is implanted after pulp cavity, the key-way shape through hole of movable neck neck 38 is passed to head and neck 1, again specialized nut 2 is rotated on head and neck 1 screw thread below, when mounted by movable neck neck 3 and specialized nut 2 coordinating at spherical concave surface 9 places, make movable neck neck 3 and femur osteotomy surface Adaptive matching, when rotation specialized nut 2, will guarantee that femoral stem is fixed well.
Claims (9)
1. a femoral hip stem prosthesis, it includes head and neck (1), neck neck (3), femoral stem near-end (4) and femoral stem far-end (5), it is characterized in that: the two sides, front and back of described femoral stem near-end (4) are plane, and other parts be nothing interference curved surface; Described femoral stem far-end (5) is cylindrical, and which is provided with two symmetrical planes (6), and its end is hemispherical dome structure, and this femoral stem far-end (5) is set to porous tantalum product; Described neck neck (3) is for disposing the movable neck neck of specialized nut (2), and its top is provided with spherical concave surface (9), is provided with a key-way shape through hole (8) in the middle of this spherical concave surface (9); Described specialized nut (2) lower end is spherical structure, and its spherical diameter is identical with the spherical concave surface (9) on movable neck neck; On described femoral stem near-end (4), be provided with the through hole (10) of hollow out.
2. femoral hip stem prosthesis according to claim 1, is characterized in that: described femoral stem far-end (5) is set to porous tantalum product, and its porosity is 60～70%.
3. femoral hip stem prosthesis according to claim 1 and 2, is characterized in that: described head and neck (1) and described femoral stem near-end (4) are one-body molded for medical metal, and realize and being fixedly connected with of described femoral stem far-end (5) through welding.
4. femoral hip stem prosthesis according to claim 1 and 2, is characterized in that: on the upper surface of described specialized nut (2), be evenly equipped with four blind cylindrical hole (7).
5. femoral hip stem prosthesis according to claim 3, is characterized in that: on the upper surface of described specialized nut (2), be evenly equipped with four blind cylindrical hole (7).
6. femoral hip stem prosthesis according to claim 1 and 2, is characterized in that: the radius of the end hemispherical dome structure of described femoral stem far-end (5) is identical with the radius of columniform femoral stem far-end (5).
7. femoral hip stem prosthesis according to claim 3, is characterized in that: the radius of the end hemispherical dome structure of described femoral stem far-end (5) is identical with the radius of columniform femoral stem far-end (5).
8. femoral hip stem prosthesis according to claim 4, is characterized in that: the radius of the end hemispherical dome structure of described femoral stem far-end (5) is identical with the radius of columniform femoral stem far-end (5).
9. femoral hip stem prosthesis according to claim 5, is characterized in that: the radius of the end hemispherical dome structure of described femoral stem far-end (5) is identical with the radius of columniform femoral stem far-end (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494036.0U CN203408131U (en) | 2013-08-14 | 2013-08-14 | Hip joint femoral component prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494036.0U CN203408131U (en) | 2013-08-14 | 2013-08-14 | Hip joint femoral component prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203408131U true CN203408131U (en) | 2014-01-29 |
Family
ID=49971060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320494036.0U Expired - Fee Related CN203408131U (en) | 2013-08-14 | 2013-08-14 | Hip joint femoral component prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203408131U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106913396A (en) * | 2015-12-25 | 2017-07-04 | 重庆润泽医药有限公司 | One kind implantation hip joint |
-
2013
- 2013-08-14 CN CN201320494036.0U patent/CN203408131U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106913396A (en) * | 2015-12-25 | 2017-07-04 | 重庆润泽医药有限公司 | One kind implantation hip joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20190814 |