CN110946680B - Femoral stem prosthesis - Google Patents
Femoral stem prosthesis Download PDFInfo
- Publication number
- CN110946680B CN110946680B CN201911082699.XA CN201911082699A CN110946680B CN 110946680 B CN110946680 B CN 110946680B CN 201911082699 A CN201911082699 A CN 201911082699A CN 110946680 B CN110946680 B CN 110946680B
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- Prior art keywords
- femoral stem
- femoral
- prosthesis
- proximal
- ridge
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 210000002436 femur neck Anatomy 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 5
- 210000000988 bone and bone Anatomy 0.000 abstract description 18
- 230000001054 cortical effect Effects 0.000 abstract description 3
- 230000000399 orthopedic effect Effects 0.000 abstract description 3
- 239000007943 implant Substances 0.000 abstract description 2
- 230000002980 postoperative effect Effects 0.000 abstract description 2
- 230000003450 growing effect Effects 0.000 abstract 1
- 210000000689 upper leg Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 4
- 230000001009 osteoporotic effect Effects 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010020100 Hip fracture Diseases 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 230000004663 cell proliferation Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 210000000963 osteoblast Anatomy 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000008924 Femoral Fractures Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052715 tantalum 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
-
- 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
- A61F2/3662—Femoral shafts
- A61F2/367—Proximal or metaphyseal parts of shafts
-
- 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
- A61F2/3662—Femoral shafts
- A61F2/3676—Distal or diaphyseal parts of shafts
Landscapes
- 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 invention provides a femoral stem prosthesis, which belongs to the technical field of orthopedic implants; the femoral stem prosthesis comprises a femoral neck, a proximal femoral stem end, a proximal femoral stem body and a distal femoral stem end which are sequentially connected, wherein the peripheral wall of the proximal femoral stem end is provided with a plurality of annular grooves; the femoral stem handle body is conical, an accommodating groove is formed in the outer peripheral wall of the femoral stem handle body, a ridge-shaped longitudinal rack is arranged on the outer peripheral wall of the femoral stem handle body, and the ridge-shaped longitudinal rack is located inside the accommodating groove; the ridge-shaped longitudinal rack is movably connected with the inner side wall of the containing groove through a rotating shaft, and the ridge-shaped longitudinal rack is close to the far end of the femoral stem; the femoral stem prosthesis is provided with a threaded hole, and a detachable tuberosity module is arranged in the threaded hole. The proximal end of the femoral stem is press-fitted in cancellous bone, and the distal end of the femoral stem is anchored in a cortical bone area, so that the proximal end is press-fitted and the distal end is anchored for double fixation, a good bone growing effect is achieved, and the probability of postoperative loosening and sinking is reduced.
Description
Technical Field
The invention relates to the technical field of orthopedic implants, in particular to a femoral stem prosthesis.
Background
In recent years, with the continuous improvement of the medical instrument technology in China, particularly in the field of orthopedics, the artificial joint replacement surgery has become an effective method generally adopted by the medical field for treating joint disability diseases, and the fixing effect between the femoral stem implanted after the surgery and the natural femur of a human body is the key for determining the service life and the curative effect of the artificial joint.
Disclosure of Invention
The invention aims to solve the technical problem of providing a femoral stem prosthesis so as to solve the problems that the existing femoral stem prosthesis has poor fixing effect with the natural femur of a human body, the femoral stem is easy to loosen and sink at a late stage, and the femoral intertrochanteric fracture or the severe osteoporotic and cracked fracture of the tuberosity part is seriously unstable, and the conventional internal fixation is hard to be competent.
In order to solve the technical problems, the invention provides the following technical scheme:
a femoral stem prosthesis comprises a femoral neck, a proximal femoral stem end, a proximal femoral stem body and a distal femoral stem end which are sequentially connected, wherein the outer peripheral wall of the proximal femoral stem end is provided with a plurality of annular grooves; the femoral stem handle body is conical, an accommodating groove is formed in the outer peripheral wall of the femoral stem handle body, a ridge-shaped longitudinal rack is arranged on the outer peripheral wall of the femoral stem handle body, and the ridge-shaped longitudinal rack is located inside the accommodating groove; the ridged longitudinal rack is movably connected with the inner side wall of the accommodating groove through a rotating shaft, the end, close to the proximal end of the femoral stem, of the ridged longitudinal rack is provided with a return spring between the end, close to the proximal end of the femoral stem, of the ridged longitudinal rack and the bottom wall of the accommodating groove, and the two ends of the return spring are fixedly connected with the ridged longitudinal rack and the bottom wall of the accommodating groove respectively; the femoral stem prosthesis is provided with a threaded hole, and a detachable tuberosity module is arranged in the threaded hole.
Wherein, the surface of the proximal end of the femoral stem is provided with a porous tantalum powder coating.
Wherein, the distal end of the femoral stem is in a polished bullet shape.
The annular grooves are distributed on the outer peripheral wall of the proximal end of the femoral stem in a stepped manner.
Preferably, the ridge-shaped longitudinal racks and the accommodating grooves are arranged in six numbers, and the six ridge-shaped longitudinal racks and the six accommodating grooves are correspondingly distributed on the outer surface wall of the femoral stem handle body in an annular array.
Further, the femoral neck is provided with a cylindrical section and a curved surface part with taper.
Preferably, the femoral stem prosthesis is made of Ti6Al 4V.
The technical scheme of the invention has the following beneficial effects:
the proximal end of the femoral stem is press-fitted in cancellous bone, and the distal end of the femoral stem is anchored in a cortical bone region, so that the proximal end press-fitting and distal end anchoring double fixation is realized, a good bone ingrowth effect is achieved, the ridged longitudinal rack can be expanded outwards close to the proximal end of the femoral stem through the action of the elasticity of the return spring on the ridged longitudinal rack, and thus the vertebral stem is fixed in a bone inner cavity, and the probability of loosening and sinking after operation can be effectively reduced; the removable trochanter module provides the best means of fixation for severely unstable intertrochanteric femoral fractures or severely osteoporotic and fragmented fractures of the tuberosity that are difficult to manage with conventional fixation.
Drawings
FIG. 1 is a schematic structural view of a femoral stem prosthesis according to the present invention;
FIG. 2 is a schematic bottom view taken along line B-B of FIG. 1;
fig. 3 is a schematic top view along line B-B in fig. 1.
[ reference numerals ]
1. A femoral neck;
2. a proximal femoral stem end;
3. a femoral stem body;
4. a femoral stem distal end;
5. a ridged longitudinal rack;
6. an accommodating groove;
7. a rotating shaft;
8. a return spring;
9. a detachable bloom module;
A. a porous tantalum coating.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, an embodiment of the present invention provides a femoral stem prosthesis, including a femoral neck 1, a proximal femoral stem end 2, a proximal femoral stem body 3, and a distal femoral stem end 4, which are connected in sequence, wherein a peripheral wall of the proximal femoral stem end 2 is provided with a plurality of annular grooves; the shearing force when the prosthesis is implanted is converted into the compressive stress, so that the initial stability of the prosthesis when the prosthesis is implanted is enhanced, the contact area with cancellous bone is increased, the bone growth is facilitated, and the good biological stability is provided. The femoral stem handle body 3 is conical, an accommodating groove 6 is formed in the outer peripheral wall of the femoral stem handle body 3, a ridge-shaped longitudinal rack 5 is arranged on the outer peripheral wall of the femoral stem handle body 3, and the ridge-shaped longitudinal rack 5 is located inside the accommodating groove 6; the peripheral wall of the femoral stem handle body 3 is provided with a ridge-shaped longitudinal rack 5 for anchoring a medullary cavity and increasing the initial stability and the anti-rotation stability. The ridged longitudinal rack 5 is movably connected with the inner side wall of the accommodating groove 6 through a rotating shaft 7, the end of the ridged longitudinal rack 5 close to the femoral stem near end 2 is provided with a return spring 8 between the bottom wall of the accommodating groove 6, and the two ends of the return spring 8 are fixedly connected with the ridged longitudinal rack 5 and the bottom wall of the accommodating groove 6 respectively; one end of the ridge-shaped longitudinal rack 5 implanted into a bone is hinged with the femoral stem handle body 3, the other end of the ridge-shaped longitudinal rack is connected with the restoring spring 8, when the femoral stem handle body 3 is implanted into the bone, the ridge-shaped longitudinal rack 5 can be contacted with the inner wall of the bone cavity through the elastic action of the restoring spring 8, so that the femoral stem handle body 3 is positioned, and the frame body is effectively prevented from sinking; the femoral stem prosthesis is provided with a threaded hole, and the threaded hole is internally provided with the detachable tuberosity module 9, so that an optimal fixing mode is provided for the conventional fixation of the seriously unstable intertrochanteric fracture of the femur or the seriously osteoporotic and cracked fracture of the tuberosity part, and the femoral stem prosthesis is convenient to operate and good in flexibility.
The surface of the proximal femoral stem end 2 is provided with the porous tantalum powder coating A, so that the femoral stem has excellent corrosion resistance and biocompatibility, can promote cell proliferation, improve the bone-forming capacity of osteoblasts and promote bone ingrowth.
Wherein, the distal end 4 of the femoral stem is in a high polished bullet shape, so as to reduce the pain of the thigh.
The annular grooves are distributed in a step shape along the shape of the proximal end 2 of the femoral stem.
Preferably, the number of the ridge-shaped longitudinal racks 5 and the number of the accommodating grooves 6 are six, and the six ridge-shaped longitudinal racks 5 and the six accommodating grooves 6 are correspondingly distributed on the outer surface wall of the femoral stem handle body 3 in an annular array.
Further, the femoral neck 1 includes a cylindrical section and a curved surface section with a taper, increasing the range of motion of the joint.
Preferably, the femoral stem prosthesis is made of Ti6Al 4V.
In the scheme, the peripheral wall of the proximal end 2 of the femoral stem is provided with a plurality of annular grooves, the peripheral wall of the stem body 3 of the femoral stem is provided with the ridge-shaped longitudinal rack 5, the proximal end 2 of the femoral stem is press-fitted in cancellous bone, and the distal end 4 of the femoral stem is anchored in a cortical bone region, so that double fixation of press-fitting at the proximal end and anchoring at the distal end is realized, a good bone ingrowth effect is achieved, the ridge-shaped longitudinal rack 5 can be expanded outwards close to the proximal end 2 of the femoral stem through the action of the elasticity of the reset spring 8 on the ridge-shaped longitudinal rack 5, and thus the bone is fixed in a bone inner cavity, and the probability of postoperative loosening and sinking can be effectively reduced; the surface of the proximal end 2 of the femoral stem is provided with the porous tantalum powder coating A, so that the femoral stem has excellent corrosion resistance and biocompatibility, can promote cell proliferation, improve the bone-forming capacity of osteoblasts and promote bone ingrowth; the distal end 4 of the femoral stem is in a high polishing bullet shape, so that thigh pain is reduced; the detachable tuberosity module provides an optimal fixing mode for the conventional fixation of the seriously unstable intertrochanteric fracture of femur or the seriously osteoporotic and cracked fracture of the tuberosity, and has the advantages of convenience in operation and high flexibility.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A femoral stem prosthesis comprises a femoral neck, a proximal femoral stem end, a proximal femoral stem body and a distal femoral stem end which are sequentially connected, and is characterized in that a plurality of annular grooves are formed in the peripheral wall of the proximal femoral stem end; the femoral stem handle body is conical, an accommodating groove is formed in the outer peripheral wall of the femoral stem handle body, a ridge-shaped longitudinal rack is arranged on the outer peripheral wall of the femoral stem handle body, and the ridge-shaped longitudinal rack is located inside the accommodating groove; the ridged longitudinal rack is movably connected with the inner side wall of the accommodating groove through a rotating shaft, the end, close to the proximal end of the femoral stem, of the ridged longitudinal rack is provided with a return spring between the end, close to the proximal end of the femoral stem, of the ridged longitudinal rack and the bottom wall of the accommodating groove, and the two ends of the return spring are fixedly connected with the ridged longitudinal rack and the bottom wall of the accommodating groove respectively; the femoral stem prosthesis is provided with a threaded hole, and a detachable tuberosity module is arranged in the threaded hole.
2. The femoral stem prosthesis of claim 1, wherein the surface of the proximal end of the femoral stem is provided with a porous tantalum powder coating.
3. The femoral stem prosthesis of claim 1, wherein the distal femoral stem end is in the shape of a polished bullet.
4. The femoral stem prosthesis of claim 1, wherein the plurality of annular grooves are disposed in a stepped configuration on the outer peripheral wall of the proximal end of the femoral stem.
5. The femoral stem prosthesis according to claim 1, wherein the number of the ridge-like longitudinal racks and the number of the receiving grooves are six, and the six ridge-like longitudinal racks and the six receiving grooves are correspondingly distributed on the outer surface wall of the femoral stem body in an annular array.
6. The femoral stem prosthesis of claim 1, wherein the femoral neck comprises a cylindrical section and a tapered curved surface section.
7. The femoral stem prosthesis of claim 1, wherein the femoral stem prosthesis is made of Ti6Al 4V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082699.XA CN110946680B (en) | 2019-11-07 | 2019-11-07 | Femoral stem prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082699.XA CN110946680B (en) | 2019-11-07 | 2019-11-07 | Femoral stem prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110946680A CN110946680A (en) | 2020-04-03 |
| CN110946680B true CN110946680B (en) | 2020-07-24 |
Family
ID=69976659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911082699.XA Active CN110946680B (en) | 2019-11-07 | 2019-11-07 | Femoral stem prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110946680B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112190370B (en) * | 2020-10-28 | 2024-05-17 | 北京中安泰华科技有限公司 | Anti-loosening femoral stem prosthesis |
| CN117084831B (en) * | 2023-02-28 | 2024-08-06 | 安徽医科大学第一附属医院 | Femoral prosthesis and method of installation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3423667A1 (en) * | 1984-05-08 | 1985-11-28 | Rüdiger Dipl.-Ing. 5204 Lohmar Scheunemann | IMPLANT FOR BONE AND TOOTH ROOT REPLACEMENT WITH SPECIAL TRANSITION STRUCTURE BETWEEN BONES AND IMPLANT CORE AND BONE SIDE WHOLE OR PARTLY RESORBABLE MATRIX |
| JP5095395B2 (en) * | 2004-05-28 | 2012-12-12 | スミス アンド ネフュー インコーポレーテッド | Grooved intramedullary stem |
| CN202136445U (en) * | 2011-04-20 | 2012-02-08 | 北京纳通科技集团有限公司 | Biological absorption type femoral stem prosthesis |
| CN202605055U (en) * | 2012-03-27 | 2012-12-19 | 浙江省中医院 | Femoral intertrochanteric fracture hip joint prosthesis for the aged |
| CN203280542U (en) * | 2013-04-26 | 2013-11-13 | 北京力达康科技有限公司 | Ionic-spray micropore tantalum coating hip joint prostheses |
-
2019
- 2019-11-07 CN CN201911082699.XA patent/CN110946680B/en active Active
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| Publication number | Publication date |
|---|---|
| CN110946680A (en) | 2020-04-03 |
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