CN113995559A - Single condyle knee joint prosthesis - Google Patents

Single condyle knee joint prosthesis Download PDF

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Publication number
CN113995559A
CN113995559A CN202111321360.8A CN202111321360A CN113995559A CN 113995559 A CN113995559 A CN 113995559A CN 202111321360 A CN202111321360 A CN 202111321360A CN 113995559 A CN113995559 A CN 113995559A
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CN
China
Prior art keywords
pad
tibial
femoral condyle
tibia
tibial tray
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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.)
Granted
Application number
CN202111321360.8A
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Chinese (zh)
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CN113995559B (en
Inventor
张亚鹏
张天宇
蔡宝存
马淑芹
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Beijing Lidakang Technology Co Ltd
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Beijing Lidakang Technology Co Ltd
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Priority to CN202111321360.8A priority Critical patent/CN113995559B/en
Publication of CN113995559A publication Critical patent/CN113995559A/en
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Publication of CN113995559B publication Critical patent/CN113995559B/en
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    • 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
    • A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
    • 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
    • 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

Abstract

The invention provides a unicondylar knee joint prosthesis, which comprises a femoral condyle, a tibial pad and a tibial tray, wherein the femoral condyle is arranged on the tibial pad and can rotate relative to the tibial pad; the tibia pad is connected with the tibia support through a sliding device, and the tibia pad can slide relative to the tibia support. The tibia support plays a role in supporting the tibia pad, and meanwhile, the problem that the tibia pad is easy to dislocate when sliding on the tibia support is solved. Through slider, the shin pad slides on the shin holds in the palm, and the shin pad can not break away from the shin and hold in the palm, can not appear dislocation phenomenon, and the stability of shin pad is good, and the wearing and tearing volume is little.

Description

Single condyle knee joint prosthesis
The application is a divisional application with application number 202010970814.3, application date 20200915 and invention name "a unicondylar knee joint prosthesis".
Technical Field
The invention relates to the technical field of orthopedic medicine, in particular to a unicondylar knee joint prosthesis.
Background
The knee joint is the most complex joint of the human body, belongs to a pulley joint and is the most important load bearing joint of the lower limbs of the human body. In the face of severe knee joint disease, knee joint replacement surgery is a common disease treatment. The existing mobile platform unicondylar knee joint prosthesis comprises a femoral condyle, a tibial pad and a tibial tray, wherein the tibial pad has the risk of sliding out of the tibial tray, and the tibial pad has large abrasion loss, poor stability and easy dislocation.
Disclosure of Invention
The invention provides a unicondylar knee joint prosthesis. The existing knee joint prosthesis has the following problems,
the tibia support has the risk of slipping out of the tibia pad, and the tibia pad has large abrasion loss, poor stability and is easy to dislocate.
To solve the above technical problem, embodiments of the present invention provide the following solutions
A unicondylar knee prosthesis, comprising:
a femoral condyle;
the tibial pad is provided with a femoral condyle, and the femoral condyle can rotate relative to the tibial pad;
the tibia pad is connected with the tibia support through a sliding device and can slide relative to the tibia support.
Wherein the sliding device includes:
the dovetail groove is arranged on the bottom surface of the tibia pad;
the spout, the spout sets up on the top surface of tibial tray, the bottom surface of tibial pad with the top surface contact of tibial tray, the dovetail can slide in the spout.
Wherein the tibial tray comprises tibial tray spherical particles, and the tibial tray spherical particles are arranged on the lower surface of the tibial tray.
Wherein the femoral condyle comprises a femoral condyle spherical particle, the femoral condyle spherical particle being provided on an upper surface of the femoral condyle.
The lower surface of the femoral condyle is a femoral condyle curved surface, and the radius of the femoral condyle curved surface is a single curvature radius.
Wherein, the upper surface of the femoral condyle is provided with a femoral condyle upright post.
The upper surface of the tibial pad is a tibial pad concave curved surface, and the tibial pad concave curved surface is opposite to the femoral condyle curved surface.
Wherein, the lower surface of the tibia support is provided with a tibia support upright post.
Wherein, the femur condyle curved surface is a highly polished femur condyle curved surface.
Wherein, the tibia pad concave curved surface is a high-precision processing tibia pad concave curved surface.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme, the unicondylar knee joint prosthesis has good articular surface inosculation degree, and the tibial pad has the advantages of sliding stability, small abrasion and no dislocation.
Drawings
FIG. 1 is a schematic structural view of a unicondylar knee prosthesis of the present invention;
FIG. 2 is a schematic view of the femoral condyle of the unicondylar knee prosthesis of the present invention;
FIG. 3 is a schematic view of a tibial pad of the unicondylar knee prosthesis of the present invention;
FIG. 4 is a first schematic structural view of a tibial tray of the unicondylar knee prosthesis of the present invention;
fig. 5 is a second schematic structural view of a tibial tray of the unicondylar knee prosthesis of the present invention.
Reference numerals:
10. a femoral condyle; 15. a tibial pad; 20. a tibial tray; 25. condylar-spherical particles of the femur; 30. a femoral condyle upright post; 35. femoral condyle surfaces; 40. a tibial pad concave curve; 45. a dovetail groove; 50. a chute; 55. a tibia support upright post; 60. tibial tray spherical particles.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1-5, the present embodiment provides a unicondylar knee prosthesis comprising a femoral condyle 10, a tibial pad 15, and a tibial tray 20, the femoral condyle 10 being disposed on the tibial pad 15, and the femoral condyle 10 being rotatable relative to the tibial pad 15; the tibial pad 15 is connected to the tibial tray 20 by a sliding mechanism, whereby sliding of the tibial pad 15 relative to the tibial tray 20 is achieved. The tibial pad 15 of the present embodiment is disposed on the tibial tray 20, and the tibial pad 15 is slid on the tibial tray 20 by a sliding device. The tibial tray 20 functions to support the tibial pad 15 while solving the problem of easy dislocation of the tibial pad 15 as it slides on the tibial tray 20. There is no sliding device between the tibial tray 20 and the tibial pad 15, and when the tibial pad 15 slides on the tibial tray 20, the tibial pad 15 is forced by other factors, so that there is a risk that the tibial pad 15 slides off the upper surface of the tibial tray 20. Through the slider, the shin pad 15 slides on the shin plate 20, and the shin pad 15 can not break away from the shin plate 20, can not appear the dislocation phenomenon, and the stability of shin pad 15 is good, and the wearing and tearing volume is little.
As shown in fig. 3-4, the sliding device of the present embodiment includes a dovetail groove 45 and a sliding groove 50, the dovetail groove 45 being provided on the bottom surface of the tibial pad 15; the sliding slot 50 is disposed on the top surface of the tibial tray 20, the bottom surface of the tibial pad 15 is in contact with the top surface of the tibial tray 20, and the dovetail slot 45 is capable of sliding within the sliding slot 50. The bottom surface of the tibial pad 15 is provided with a dovetail groove 45, the upper surface of the tibial tray 20 is provided with a sliding groove 50, the dovetail groove 45 can be inserted into the sliding groove 50 and can move in the sliding groove 50, so that when the tibial pad 15 slides on the tibial tray 20, the dovetail groove 45 can not be separated from the groove of the tibial tray 20 all the time, and the problem of dislocation of the tibial pad 15 when sliding on the tibial tray 20 is solved.
As further shown in fig. 5, the tibial tray 20 of the present embodiment includes the femoral condylar spherical particles 25, and the tibial tray spherical particles 60 are disposed on the lower surface of the tibial tray 20. The sliding groove 50 is formed in the upper surface of the tibial tray 20 in this embodiment, so that the thickness of the sliding groove 50 of the tibial tray 20 is reduced, and the structure is weakened, and at this time, the femoral condyle spherical particles 25 are added to the lower surface of the tibial tray 20, so as to make up for the missing structure and the reinforcing performance of the groove on the tibial tray 20. Meanwhile, when the tibia support 20 is fixed by bone cement, the tibia support spherical particles 60 can increase the bonding strength of the fixation of the tibia support 20 and ensure that the tibia support 20 is not loosened after long-term use. In order to improve the initial stability of the tibial tray 20, the tibial tray columns 55 are arranged on the lower surface of the tibial tray 20 of the embodiment, preferably 3 tibial tray columns 55 are arranged, and the tibial tray columns 55 are optimally designed to enhance the structural performance of the tibial tray 20, reduce the fatigue failure risk and increase the initial stability of the prosthesis. Also, the tibial tray 20 is anatomically designed to provide better prosthetic fit for the anatomy.
As shown in FIG. 2, the femoral condyle 10 of the present embodiment is anatomical and provides better prosthetic fit. The femoral condyle 10 includes a femoral condyle spherical particle 25, the femoral condyle spherical particle 25 is disposed on the upper surface of the femoral condyle 10, and a femoral condyle upright 30 is further disposed on the upper surface of the femoral condyle 10. The femoral condyle spherical particle 25 and the femoral condyle post 30 of the femoral condyle 10 of the present embodiment increase the initial stability of the prosthesis and reduce the risk of loosening. The femoral condyle spherical particles 25 strengthen the femoral condyle 10, so that the femoral condyle has better mechanical properties, and the fatigue failure after long-term use is greatly reduced. The lower surface of the femoral condyle 10 is a femoral condyle curved surface 35, and the radius of the femoral condyle curved surface 35 is a single curvature radius. The femoral condyle curved surface 35 is highly polished, and is the highly polished femoral condyle curved surface 35. The single radius of curvature of the femoral condyle curved surface 35 may increase the contact area and reduce the contact stress; meanwhile, high polishing treatment is adopted, so that the abrasion coefficient is reduced.
As shown in fig. 1 and 3, the upper surface of the tibial pad 15 of the present embodiment is a tibial pad concave curved surface 40, the tibial pad concave curved surface 40 is disposed opposite to the femoral condyle curved surface 35, and the tibial pad concave curved surface 40 is a high-precision machined posterior tibial pad concave curved surface 40. The concave tibial pad surface 40 cooperates with the femoral condyle surface 35, and the concave tibial pad surface 40 provides a support surface for the rotation of the femoral condyle 10. The consistency of the tibial pad concave curved surface 40 and the femoral condyle curved surface 35 enables the femoral condyle 10 to have a large contact area all the time when rotating, and effectively reduces the contact stress. The highly polished femoral condyle curved surface 35 and the tibial pad concave curved surface 40 processed at high precision are matched for use, so that the abrasion of the tibial pad concave curved surface 40 is greatly reduced, the generation of abrasion particles is reduced, and the risks of infection and looseness after knee joint replacement are reduced.
The femoral condyle 10 of the present embodiment is made of cast cobalt-chromium-molybdenum alloy, the tibial pad 15 is made of ultra-high molecular weight polyethylene or VE high cross-linked ultra-high molecular weight polyethylene, and the tibial tray 20 is made of medical titanium alloy or cobalt-chromium-molybdenum alloy.
The unicondylar knee prosthesis has good articular surface goodness of fit, and the tibial pad 15 has the advantages of stable sliding, small abrasion and no dislocation.
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 unicondylar knee prosthesis, comprising:
a femoral condyle;
the tibial pad is provided with a femoral condyle, and the femoral condyle can rotate relative to the tibial pad;
the tibia pad is connected with the tibia support through a sliding device and can slide relative to the tibia support.
2. The unicondylar knee prosthesis of claim 1, wherein the sliding means comprises:
the dovetail groove is arranged on the bottom surface of the tibia pad;
the spout, the spout sets up on the top surface of tibial tray, the bottom surface of tibial pad with the top surface contact of tibial tray, the dovetail can slide in the spout.
3. The unicondylar knee prosthesis of claim 1, wherein the femoral condyle comprises a femoral condylar spherical particle disposed on an upper surface of the femoral condyle.
4. The unicondylar knee prosthesis of claim 1, wherein the inferior surface of the femoral condyle is a femoral condyle curve having a radius of single radius of curvature.
5. The unicondylar knee prosthesis of claim 1, wherein the upper surface of the tibial pad is a tibial pad concave curve disposed opposite the femoral condylar curve.
6. The unicondylar knee prosthesis of claim 1, wherein a tibial tray post is provided on a lower surface of the tibial tray.
7. The unicondylar knee prosthesis of claim 4, wherein the femoral condylar curve is a highly polished posterior femoral condylar curve.
CN202111321360.8A 2020-09-15 2020-09-15 Single condyle knee joint prosthesis Active CN113995559B (en)

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CN202111321360.8A CN113995559B (en) 2020-09-15 2020-09-15 Single condyle knee joint prosthesis
CN202010970814.3A CN112155800A (en) 2020-09-15 2020-09-15 Single condyle knee joint prosthesis

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CN113995559B CN113995559B (en) 2022-12-06

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113995559B (en) * 2020-09-15 2022-12-06 北京力达康科技有限公司 Single condyle knee joint prosthesis
CN113648111B (en) * 2021-08-20 2024-03-26 西宁市第一人民医院 Dislocation-preventing type unicondylar knee joint prosthesis

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW328227U (en) * 1997-07-28 1998-03-11 United Orthopedic Corp Artificial knee joint assembly
US6126692A (en) * 1998-06-25 2000-10-03 New York Society For The Relief Of The Ruptured And Crippled Maintaining The Hospital For Special Surgery Retaining mechanism for a modular tibial component of a knee prosthesis
CN104840279A (en) * 2015-05-26 2015-08-19 北京爱康宜诚医疗器材股份有限公司 Knee joint prosthesis
CN107616859A (en) * 2017-10-18 2018-01-23 北京爱康宜诚医疗器材有限公司 Single condyle knee-joint prosthesis
CN109199647A (en) * 2017-07-03 2019-01-15 天津富华医疗科技有限公司 Half condyle formula artificial knee joint
CN111616841A (en) * 2020-05-26 2020-09-04 天衍医疗器材有限公司 Novel knee joint prosthesis of locking mechanism
CN112155800A (en) * 2020-09-15 2021-01-01 北京力达康科技有限公司 Single condyle knee joint prosthesis
CN215960125U (en) * 2021-10-13 2022-03-08 山东大学齐鲁医院(青岛) Thighbone perforating device for single condyle replacement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW328227U (en) * 1997-07-28 1998-03-11 United Orthopedic Corp Artificial knee joint assembly
US6126692A (en) * 1998-06-25 2000-10-03 New York Society For The Relief Of The Ruptured And Crippled Maintaining The Hospital For Special Surgery Retaining mechanism for a modular tibial component of a knee prosthesis
CN104840279A (en) * 2015-05-26 2015-08-19 北京爱康宜诚医疗器材股份有限公司 Knee joint prosthesis
CN109199647A (en) * 2017-07-03 2019-01-15 天津富华医疗科技有限公司 Half condyle formula artificial knee joint
CN107616859A (en) * 2017-10-18 2018-01-23 北京爱康宜诚医疗器材有限公司 Single condyle knee-joint prosthesis
CN111616841A (en) * 2020-05-26 2020-09-04 天衍医疗器材有限公司 Novel knee joint prosthesis of locking mechanism
CN112155800A (en) * 2020-09-15 2021-01-01 北京力达康科技有限公司 Single condyle knee joint prosthesis
CN215960125U (en) * 2021-10-13 2022-03-08 山东大学齐鲁医院(青岛) Thighbone perforating device for single condyle replacement

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