CN110538010B - Unicondylar knee joint prosthesis - Google Patents
Unicondylar knee joint prosthesis Download PDFInfo
- Publication number
- CN110538010B CN110538010B CN201910877622.5A CN201910877622A CN110538010B CN 110538010 B CN110538010 B CN 110538010B CN 201910877622 A CN201910877622 A CN 201910877622A CN 110538010 B CN110538010 B CN 110538010B
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- tibia
- main body
- tibial insert
- tibial
- femoral condyle
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- 210000000629 knee joint Anatomy 0.000 title abstract description 16
- 210000002303 tibia Anatomy 0.000 claims abstract description 82
- 210000000689 upper leg Anatomy 0.000 claims abstract description 23
- 210000003127 knee Anatomy 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims 1
- 238000002513 implantation Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000001727 in vivo Methods 0.000 abstract description 2
- 210000000988 bone and bone Anatomy 0.000 description 3
- 239000002639 bone cement Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000008407 joint function Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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
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 provides a unicondylar knee joint prosthesis, wherein a femoral condyle, a tibial cushion and a tibial platform are arranged in the unicondylar knee joint prosthesis, a main body of the femoral condyle is used for being connected with a femur, a limiting structure is arranged on the main body, and at least one part of the limiting structure protrudes out of the edge of a first joint surface of the main body; the second joint surface of the tibia pad is matched with the first joint surface, the limiting structure is in limiting fit with the side surface of the tibia pad, the tibia platform is used for being connected with the tibia, the tibia platform is matched with one side of the tibia pad, which is away from the femoral condyle, and the tibia pad is movably arranged relative to the tibia platform. Can realize the function of knee joint after implanting the patient in vivo through this scheme to, through limit structure and the spacing cooperation of shin bone pad, can restrict the range of motion of shin bone pad, thereby avoided shin bone pad and femoral condyle to break away from or shin bone pad and shin bone platform break away from, avoided the easy dislocation of unicondylar knee joint prosthesis promptly problem, improved the reliability of prosthesis long-term implantation.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a unicondylar knee joint prosthesis.
Background
With the increasing concept of minimally invasive in the clinic, unicondylar knee prostheses are increasingly favored by clinicians. The unicondylar knee prosthesis has obvious advantages such as small trauma, little blood loss, short operation time, quick recovery of patients and the like when treating the anterior medial osteoarthritis. Current unicondylar knee prostheses are mainly in two typical forms, a fixed platform and a movable platform.
The movable platform type unicondylar knee joint prosthesis has wide clinical application, is convenient for installation in the operation of doctors, and reduces the abrasion loss of the prosthesis. However, the existing unicondylar knee joint prosthesis lacks constraint and is easy to dislocate, and once the dislocation happens, secondary operation is performed, so that mental pain and economic loss are brought to patients.
Disclosure of Invention
The invention provides a unicondylar knee prosthesis, which aims to solve the problem that the unicondylar knee prosthesis in the prior art is easy to dislocation.
In order to solve the above problems, the present invention provides a unicondylar knee prosthesis comprising: the femoral condyle comprises a main body and a limiting structure, wherein the main body is provided with an arc-shaped first joint surface, the main body is used for being connected with a femur, the limiting structure is arranged on the main body, and at least one part of the limiting structure protrudes out of the edge of the first joint surface; the tibia pad is provided with an arc-shaped second joint surface, the second joint surface is matched with the first joint surface, so that the tibia pad slides along the extending direction of the first joint surface, and the limiting structure is in limiting fit with the side surface of the tibia pad; the tibia platform is used for being connected with tibia, the tibia platform is matched with one side of the tibia pad, which is far away from the femur condyle, so as to support the tibia pad, and the tibia pad is movably arranged relative to the tibia platform.
Further, the limit structure comprises a baffle plate, and the baffle plate is arranged on the side surface of the main body along the extending direction of the first joint surface.
Further, the number of the baffles is two, the two baffles are arranged on two sides of the first joint surface in a one-to-one correspondence manner, the tibia pad is positioned between the two baffles, and the two side surfaces of the tibia pad are in limit fit with the two baffles in a one-to-one correspondence manner.
Further, the main body is of an arc plate-shaped structure, and one side of the main body, which is far away from the tibia pad, is provided with an arc inner-shaped surface which is used for being matched with the femur.
Further, the main body is of an arc plate-shaped structure, and the femoral condyle further comprises: the fixed column, the fixed column setting is in the one side of deviating from the shin bone pad of main part, and the fixed column is used for penetrating in the femur.
Further, be provided with first spacing groove on the outer peripheral face of fixed column, the fixed column is two, and two fixed column intervals set up in the main part, and two fixed columns are different along the length of the direction that deviates from the main part.
Further, the side of the tibial insert facing away from the femoral condyle is planar and the side of the tibial plateau that mates with the tibial insert is planar.
Further, the tibia platform comprises a supporting seat and a connecting plate arranged on the supporting seat, the supporting seat is matched with the tibia pad, the connecting plate is positioned on one side of the supporting seat, which is away from the tibia pad, and the connecting plate is used for penetrating into tibia.
Further, a second limit groove and a third limit groove are formed in the connecting plate, and the second limit groove and the third limit groove are respectively located on two sides of the connecting plate.
Further, the two connecting plates are arranged on the supporting seat at intervals, and the lengths of the two connecting plates along the direction deviating from the supporting seat are different.
By applying the technical scheme of the invention, a femoral condyle, a tibial pad and a tibial platform are arranged in the unicondylar knee joint prosthesis, the femoral condyle comprises a main body and a limiting structure, the main body is used for being connected with a femur, the limiting structure is arranged on the main body, and at least one part of the limiting structure protrudes out of the edge of a first joint surface of the main body; the second joint face of shin bone pad cooperates with first joint face to make shin bone pad slide along the extending direction of first joint face, limit structure and the spacing cooperation of side of shin bone pad, the shin bone platform is used for being connected with the shin bone, and the shin bone platform cooperates with the one side of shin bone pad that deviates from the femur condyle, and the shin bone pad sets up relative shin bone platform movably. Can realize the function of knee joint after implanting the patient in vivo through this scheme to, through limit structure and the spacing cooperation of shin bone pad, can restrict the range of motion of shin bone pad, thereby avoided shin bone pad and femoral condyle to break away from or shin bone pad and shin bone platform break away from, avoided the easy dislocation of unicondylar knee joint prosthesis promptly problem, improved the reliability of prosthesis long-term implantation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic structural view of a unicondylar knee prosthesis provided by an embodiment of the present invention;
FIG. 2 shows a schematic representation of the structure of the femoral condyle of FIG. 1;
FIG. 3 shows a schematic view of the tibial insert of FIG. 1;
Fig. 4 shows a schematic structural view of the tibial plateau of fig. 1.
Wherein the above figures include the following reference numerals:
10. femoral condyles; 11. a main body; 12. a limit structure; 13. a first articular surface; 14. an inner profile; 15. fixing the column; 16. a first limit groove; 17. a baffle; 20. a tibial insert; 21. a second articular surface; 30. a tibial plateau; 31. a support base; 32. a connecting plate; 33. the second limit groove; 34. and a third limit groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 4, an embodiment of the present invention provides a unicondylar knee prosthesis comprising: the femoral condyle 10, the femoral condyle 10 comprises a main body 11 and a limiting structure 12, the main body 11 is provided with an arc-shaped first joint surface 13, the main body 11 is used for being connected with a femur, the limiting structure 12 is arranged on the main body 11, and at least one part of the limiting structure 12 protrudes out of the edge of the first joint surface 13; the tibia pad 20, the tibia pad 20 has arcuate second joint surface 21, the second joint surface 21 cooperates with first joint surface 13, in order to make the tibia pad 20 slide along extension direction of the first joint surface 13, limit the limit structure 12 and limit cooperating with side of the tibia pad 20; a tibial plateau 30 for connection with the tibia, the tibial plateau 30 cooperating with a side of the tibial insert 20 facing away from the femoral condyle 10 to support the tibial insert 20, the tibial insert 20 being movably disposed relative to the tibial plateau 30.
By applying the technical scheme of the embodiment, a femoral condyle 10, a tibial pad 20 and a tibial platform 30 are arranged in a unicondylar knee prosthesis, the femoral condyle 10 comprises a main body 11 and a limiting structure 12, the main body 11 is used for being connected with a femur, the limiting structure 12 is arranged on the main body 11, and at least one part of the limiting structure 12 protrudes out of the edge of a first joint surface 13 of the main body 11 along the thickness direction of the main body 11; the second articular surface 21 of the tibial insert 20 cooperates with the first articular surface 13 to slide the tibial insert 20 along the extension direction of the first articular surface 13, the spacing structure 12 cooperates with a lateral side of the tibial insert 20 to provide a spacing fit, the tibial plateau 30 is adapted to be coupled to a tibia, the tibial plateau 30 cooperates with a side of the tibial insert 20 facing away from the femoral condyle 10, and the tibial insert 20 is movably disposed relative to the tibial plateau 30. The knee joint function can be realized after the prosthesis is implanted into a patient through the scheme, and the movable range of the tibial insert 20 can be limited through the limit fit of the limit structure 12 and the tibial insert 20, so that the problem that the tibial insert 20 is separated from the femoral condyle 10 or the tibial insert 20 is separated from the tibial platform 30, namely the problem that the unicondylar knee joint prosthesis is easy to dislocation is avoided, and the reliability of the long-term implantation of the prosthesis is improved.
In this embodiment, the first articular surface 13 extends along an equal radius curve, which allows for good joint function. The second joint surface 21 mates with the first joint surface 13.
As shown in fig. 1 and 2, the stopper structure 12 includes a shutter 17, and the shutter 17 is provided on the side surface of the main body 11 in the extending direction of the first joint surface 13. Through the arrangement, the tibia pad 20 moves relative to the femur condyle 10, and can be limited through the limiting structure 12 in the process of matching with different positions of the first joint surface 13, so that the reliability of limiting is improved. Alternatively, in the present embodiment, the baffle 17 may be provided as an arc plate.
Further, two baffles 17 are provided, the two baffles 17 are arranged on two sides of the first joint surface 13 in a one-to-one correspondence, the tibia pad 20 is positioned between the two baffles 17, and two side surfaces of the tibia pad 20 are in limit fit with the two baffles 17 in a one-to-one correspondence. Through the arrangement, the two lateral sides of the tibial insert 20 can be limited by the two baffles 17, so that the tibial insert 20 can only slide along the first joint surface 13 in the area between the two baffles 17, the reliability of limiting is improved, and the tibial insert 20 moves along a preset path. Optionally, two opposite faces of the baffle 17 are polished to reduce friction.
In this embodiment, the body 11 is of arcuate plate-like configuration, and the side of the body 11 facing away from the tibial insert 20 has an arcuate inner profile 14, the inner profile 14 being adapted to engage the femur. The attachment and biofusion is facilitated by the provision of the inner profile 14 to the femur of the patient.
In this embodiment, the main body 11 has an arcuate plate-like structure, and the femoral condyle 10 further includes: the fixed column 15, the fixed column 15 sets up in the side of main part 11 facing away from shin bone pad 20, and the fixed column 15 is used for penetrating in the femur. By providing the fixing post 15, the connection strength between the femoral condyle 10 and the femur can be improved.
As shown in fig. 2, the outer peripheral surface of the fixing columns 15 is provided with a first limit groove 16, two fixing columns 15 are arranged on the main body 11 at intervals, and the lengths of the two fixing columns 15 along the direction deviating from the main body 11 are different. The first limiting groove 16 can be used for filling bone cement and other materials to improve the connection strength between the fixing column 15 and the femur and avoid detachment. The two fixing posts 15 are arranged, so that the femoral condyle 10 can be prevented from rotating relative to the femur. Optionally, the fixing post 15 is provided with a plurality of first limiting grooves 16 along its circumferential direction at intervals, so as to further improve the connection strength between the fixing post 15 and the femur and prevent the fixing post 15 from rotating relative to the femur.
In this embodiment, the side of the tibial insert 20 facing away from the femoral condyle 10 is planar and the side of the tibial plateau 30 that mates with the tibial insert 20 is planar. Thus, the surfaces of the tibia pad 20 and the tibia platform 30 which are contacted with each other are all plane surfaces, so that the structures of the tibia pad 20 and the tibia platform 30 can be simplified, the manufacturing is convenient, and the cost is reduced. Optionally, the surfaces of the tibial insert 20 and the tibial plateau 30 that contact each other are each polished to reduce friction.
As shown in fig. 4, the tibial plateau 30 includes a support seat 31 and a connecting plate 32 disposed on the support seat 31, the support seat 31 being engaged with the tibial insert 20, the connecting plate 32 being located on a side of the support seat 31 facing away from the tibial insert 20, the connecting plate 32 being configured to penetrate into the tibia. The strength of the connection of the tibial plateau 30 to the tibia can be improved by providing the connection plate 32. Moreover, the web 32 is configured in a plate-like configuration so as to prevent the tibial plateau 30 from deflecting relative to the tibia.
Further, the connecting plate 32 is provided with a second limit groove 33 and a third limit groove 34, and the second limit groove 33 and the third limit groove 34 are respectively located at two sides of the connecting plate 32. The second limiting groove 33 and the third limiting groove 34 can be used for filling bone cement and other materials so as to improve the connection strength between the connecting plate 32 and the tibia and avoid detachment.
In this embodiment, there are two connection plates 32, two connection plates 32 are disposed on the support base 31 at intervals, and the lengths of the two connection plates 32 in the direction away from the support base 31 are different. The strength of the connection of the tibial plateau 30 to the tibia is enhanced by the two connection plates 32. The two connection plates 32 differ in length in the direction away from the support seat 31 for cooperation with the tibial structure, wherein the short connection plate 32 is for connection with the lateral side of the tibia and the long connection plate 32 is for connection with the medial side of the tibia.
In the clinical application process, the damaged femoral condyle is processed into the shape of the inner molded surface 14 of the femoral condyle 10 through a special tool, the femoral condyle 10 is drilled according to the position of the fixing column 15 of the femoral condyle 10, then the femoral condyle 10 is installed on the distal end of a femur, the proximal end of the tibia is cut according to the proper height of the tibia pad 20 and the tibia platform 30 through the tool, then the tibia platform 30 is installed on a proximal bone bed of the tibia according to the position of the connecting plates 32 on the inner side and the outer side of the tibia platform 30, finally the bottom surface of the tibia pad 20 is placed on the upper plane of the tibia platform, the second joint surface 21 of the tibia pad 20 is in matched contact with the first joint surface 13 of the femoral condyle 10, and the side surface of the tibia pad 20 is in contact with the two baffles 17 of the femoral condyle 10.
After the installation, in the course of the flexion and extension movement of the femoral condyle 10, the two baffles 17 of the femoral condyle 10 limit the tibial insert 20, and the tibial insert 20 can freely move on the upper plane of the tibial platform 30, but the tibial insert 20 cannot be separated from the femoral condyle 10, so that dislocation of the tibial insert 20 is avoided.
The prosthesis is made of artificial prosthesis biological materials, the inner molded surface 14 of the femoral condyle 10, the fixing column 15, the bottom surface of the tibial plateau 30 and the connecting plate 32 can be fixed with a bone bed through bone cement, and biological coating materials such as pure titanium coating, hydroxyapatite coating and the like can be added to realize biological fixation with the bone bed.
By applying the technical scheme of the embodiment, a femoral condyle 10, a tibial pad 20 and a tibial platform 30 are arranged in a unicondylar knee prosthesis, the femoral condyle 10 comprises a main body 11 and a limiting structure 12, the main body 11 is used for being connected with a femur, the limiting structure 12 is arranged on the main body 11, and at least one part of the limiting structure 12 protrudes out of the edge of a first joint surface 13 of the main body 11 along the thickness direction of the main body 11; the second articular surface 21 of the tibial insert 20 cooperates with the first articular surface 13 to slide the tibial insert 20 along the extension direction of the first articular surface 13, the spacing structure 12 cooperates with a lateral side of the tibial insert 20 to provide a spacing fit, the tibial plateau 30 is adapted to be coupled to a tibia, the tibial plateau 30 cooperates with a side of the tibial insert 20 facing away from the femoral condyle 10, and the tibial insert 20 is movably disposed relative to the tibial plateau 30. The knee joint function can be realized after the prosthesis is implanted into a patient through the scheme, and the movable range of the tibial insert 20 can be limited through the limit fit of the limit structure 12 and the tibial insert 20, so that the problem that the tibial insert 20 is separated from the femoral condyle 10 or the tibial insert 20 is separated from the tibial platform 30, namely the problem that the unicondylar knee joint prosthesis is easy to dislocation is avoided, and the reliability of the long-term implantation of the prosthesis is improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A unicondylar knee prosthesis comprising:
A femoral condyle (10), the femoral condyle (10) comprising a main body (11) and a limiting structure (12), the main body (11) is provided with an arc-shaped first joint surface (13), the main body (11) is used for being connected with a femur, the limiting structure (12) is arranged on the main body (11), and at least one part of the limiting structure (12) protrudes out of the edge of the first joint surface (13);
A tibial insert (20), the tibial insert (20) having an arcuate second articular surface (21), the second articular surface (21) cooperating with the first articular surface (13) to slide the tibial insert (20) in the direction of extension of the first articular surface (13), the spacing structure (12) being in spacing engagement with a side of the tibial insert (20);
A tibial plateau (30) for connection with a tibia, the tibial plateau (30) cooperating with a side of the tibial insert (20) facing away from the femoral condyle (10) to support the tibial insert (20), the tibial insert (20) being movably disposed relative to the tibial plateau (30);
the limiting structure (12) comprises a baffle (17), and the baffle (17) is arranged on the side surface of the main body (11) along the extending direction of the first joint surface (13);
The number of the baffles (17) is two, the two baffles (17) are arranged on two sides of the first joint surface (13) in a one-to-one correspondence manner, the tibia pad (20) is positioned between the two baffles (17), and two side surfaces of the tibia pad (20) are in limit fit with the two baffles (17) in a one-to-one correspondence manner; two opposite sides of the two baffles (17) are polished to reduce friction with the tibial insert (20).
2. The unicondylar knee prosthesis according to claim 1, characterized in that the body (11) has an arcuate plate-like structure, the side of the body (11) facing away from the tibial insert (20) having an arcuate inner profile (14), the inner profile (14) being intended to cooperate with the femur.
3. The unicondylar knee prosthesis according to claim 1, characterized in that said body (11) is of arcuate plate-like structure, said femoral condyle (10) further comprising:
The fixing column (15), the fixing column (15) is arranged on one side of the main body (11) deviating from the tibia pad (20), and the fixing column (15) is used for penetrating into the femur.
4. A unicondylar knee prosthesis according to claim 3, characterized in that the outer circumferential surface of the fixing columns (15) is provided with a first limit groove (16), the number of the fixing columns (15) is two, the two fixing columns (15) are arranged on the main body (11) at intervals, and the lengths of the two fixing columns (15) along the direction deviating from the main body (11) are different.
5. The unicondylar knee prosthesis of claim 1, wherein the side of the tibial insert (20) facing away from the femoral condyle (10) is planar and the side of the tibial plateau (30) mating with the tibial insert (20) is planar.
6. The unicondylar knee prosthesis according to claim 1, characterized in that the tibial plateau (30) comprises a support seat (31) and a connecting plate (32) arranged on the support seat (31), the support seat (31) being fitted with the tibial insert (20), the connecting plate (32) being located on the side of the support seat (31) facing away from the tibial insert (20), the connecting plate (32) being adapted to penetrate into the tibia.
7. The unicondylar knee prosthesis according to claim 6, characterized in that the connecting plate (32) is provided with a second limit groove (33) and a third limit groove (34), the second limit groove (33) and the third limit groove (34) being located on two sides of the connecting plate (32), respectively.
8. The unicondylar knee prosthesis according to claim 6, characterized in that the number of the connection plates (32) is two, the two connection plates (32) are arranged on the support base (31) at intervals, and the lengths of the two connection plates (32) in the direction away from the support base (31) are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877622.5A CN110538010B (en) | 2019-09-17 | 2019-09-17 | Unicondylar knee joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877622.5A CN110538010B (en) | 2019-09-17 | 2019-09-17 | Unicondylar knee joint prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110538010A CN110538010A (en) | 2019-12-06 |
| CN110538010B true CN110538010B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910877622.5A Active CN110538010B (en) | 2019-09-17 | 2019-09-17 | Unicondylar knee joint prosthesis |
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| CN (1) | CN110538010B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603278A (en) * | 2020-06-22 | 2020-09-01 | 北京爱康宜诚医疗器材有限公司 | Knee joint prosthesis |
| CN112674913B (en) * | 2021-01-14 | 2021-11-26 | 福州大学 | Unicondylar knee joint prosthesis capable of preventing looseness and working method thereof |
| CN113367854B (en) * | 2021-05-24 | 2023-08-01 | 北京纳通医疗科技控股有限公司 | Tibial tray prosthesis and knee joint prosthesis |
| CN113813007B (en) * | 2021-10-13 | 2023-07-18 | 山东大学齐鲁医院(青岛) | Angle-adjustable femur perforating device |
| CN113892999B (en) * | 2021-10-13 | 2023-07-21 | 山东大学齐鲁医院(青岛) | Femur perforating device |
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| US6443991B1 (en) * | 1998-09-21 | 2002-09-03 | Depuy Orthopaedics, Inc. | Posterior stabilized mobile bearing knee |
| CN104507420A (en) * | 2012-04-19 | 2015-04-08 | 泰克尼梅德公司 | Spacer implant for the temporary replacement of knee prosthesis |
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