CN109124832B - Femoral condyle prosthesis suitable for female patient - Google Patents
Femoral condyle prosthesis suitable for female patient Download PDFInfo
- Publication number
- CN109124832B CN109124832B CN201811214404.5A CN201811214404A CN109124832B CN 109124832 B CN109124832 B CN 109124832B CN 201811214404 A CN201811214404 A CN 201811214404A CN 109124832 B CN109124832 B CN 109124832B
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- Prior art keywords
- femur
- condyle
- groove
- anterior
- prosthesis
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- 210000000689 upper leg Anatomy 0.000 claims abstract description 117
- 230000008719 thickening Effects 0.000 claims description 10
- 210000003127 knee Anatomy 0.000 claims description 3
- 210000002303 tibia Anatomy 0.000 abstract 1
- 210000000629 knee joint Anatomy 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 210000004417 patella Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 210000004285 patellofemoral joint Anatomy 0.000 description 3
- 210000003484 anatomy Anatomy 0.000 description 2
- 210000004439 collateral ligament Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000013150 knee replacement Methods 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
Abstract
The invention discloses a femoral condyle prosthesis suitable for female patients, comprising: the outer side of the anterior condyle is a cambered surface and is used for being connected with the patellar articular surface joint; the outer sides of the first femur and the second femur are arc-shaped and are arranged on the same side in parallel; the connecting block is used for connecting the first femur with the second femur which are close to each other, and is recessed in an arc shape inwards to form a pulley groove; the first femur, the second femur and the connecting block are connected with the tibia joint surface joint; the width of the front condyle is 41-46 mm, and the thickness of the front condyle is 0.8-9 mm; the anterior-posterior diameter of the prosthesis between the outer side of the anterior condyle and the outer side of the first femur is 58-71.5 mm; the anterior-posterior diameters of the anterior condyle inner side and the first femur outer side are 53-70.5 mm; the inner diameter and the outer diameter of the far side of the first femur and the second femur are 57-72 mm; and the Q angle of the connection of the first femur, the second femur and the connecting block with the tibial articular surface is 9-10 degrees.
Description
Technical Field
The present invention relates to orthopaedic prostheses, and more particularly, to femoral condyle prostheses suitable for use in female patients.
Background
The femoral component is a prosthesis for knee replacement. After the focus of the femoral condyle of the human body is resected, the femoral condyle is arranged at the far end of the femur to replace the function of the femoral condyle. The femoral component has an inner surface for fixation in combination with a human bone and an outer surface for performing the function of a joint for relative movement with the patella prosthesis and tibial insert prosthesis, respectively, providing mobility of the knee joint. The femoral components in the current market are developed according to the anatomical shape of the femoral condyles of the human body, and most of anatomical data are acquired from the femoral condyles of the knee joint of the male, so that the femoral component is suitable for most male patients.
The femoral components currently used in the market are mostly developed based on anatomical data of male femoral condyles, and are suitable for the femoral condyle anatomy of most male patients, but are not suitable for the femoral condyle anatomy of female patients. For example, the same anatomical sign is adopted to cut the femur condyle of a female patient, and after the common femur component prosthesis is installed, excessive coverage of the femur component prosthesis to the front femur condyle of the patient and the internal and external directions of the femur can occur, so that a cantilever beam effect is formed, and the stress and fixation of the femur component prosthesis are affected; the too thick anterior condyle of the femoral component prosthesis causes the tension of the anterior condyle part and limited mobility of the patient in the knee joint buckling process; the small Q angle influences the movement track of the patella, causes the patellofemoral joint to move abnormally, and influences the patellar movement of a patient and the service life of the femoral component prosthesis.
Disclosure of Invention
The invention designs and develops the femoral condyle prosthesis suitable for female patients, optimizes the width of the front condyle and the thickness of the front condyle in the femoral condyle prosthesis, the front-back diameter length of the prosthesis at the outer side of the front condyle and the outer side of the first femur, the front-back diameter length of the osteotomy at the inner side of the front condyle and the outer side of the first femur, the inner-outer diameter width of the side far away from the second femur and the Q angle size of the joint connection of the first femur, the second femur and the connecting block with the tibial articular surface, can better adapt to female patients, and increases the mobility of femoral components.
The technical scheme provided by the invention is as follows:
a femoral condyle prosthesis adapted for use in a female patient configured to articulate with a tibial articular surface and a patellar articular surface in a knee prosthesis, the femoral condyle prosthesis comprising:
The outer side of the anterior condyle is a cambered surface and is used for being connected with the patellar articular surface joint; and
The outer sides of the first femur and the second femur are arc-shaped, are arranged on the same side in parallel, and are in arc connection with the front condyle to form a U-shaped structure;
The connecting block is used for connecting the first femur with the second femur which are close to each other, and is recessed in an arc shape inwards to form a pulley groove;
wherein the first femur, the second femur, and the connecting block are connected with the tibial articular surface joint;
Wherein the width of the front condyle is 41-46 mm, and the thickness of the front condyle is 0.8-9 mm; the anterior-posterior diameter of the prosthesis between the outer side of the anterior condyle and the outer side of the first femur is 58-71.5 mm; the anterior-posterior diameters of the anterior condyle inner side and the first femur outer side are 53-70.5 mm; the inner diameter and the outer diameter of the far side of the first femur and the second femur are 57-72 mm; and the Q angle of the connection of the first femur, the second femur and the connecting block with the tibial articular surface is 9-10 degrees.
Preferably, the first femur and the second femur each include a recess provided inside the first femur and the second femur, respectively, for connection fixation with the femur.
Preferably, the groove includes:
The first groove is respectively arranged at the inner sides of the joints of the first femur and the front condyle and the joints of the second femur and the front condyle, and the bottom surface of the first groove is an inclined surface;
The second groove is respectively arranged on the inner sides of the first femur and the second femur, is positioned at the bottom of the U-shaped structure, and is horizontally arranged on the bottom surface and is smoothly connected with the bottom surface of the first groove;
And the third groove is respectively arranged at one end, far away from the first groove, of the inner sides of the first femur and the second femur, and the bottom surface of the third groove is a vertical plane and is in smooth connection with the bottom surface of the second groove.
Preferably, the connecting block comprises a flange, which is integrally formed inside the connecting block, is positioned at the bottom of the U-shaped structure, and is horizontally arranged.
Preferably, the flange comprises:
And a fourth groove provided at the center of the flange.
Preferably, the fourth groove is one of rectangular and circular.
Preferably, the connection block further comprises:
the thickening ridge is arranged on the inner side of the joint of the connecting block and the anterior condyle and parallel to the bottom surface of the first groove, and the thickening ridge is smoothly connected with the flange.
Preferably, the method further comprises:
a first fixing groove provided at the center of the thickened ridge portion;
And the second fixing groove is arranged at one end of the inner part of the connecting block far away from the thickening ridge.
Preferably, the method further comprises:
The fixing nail is cylindrical and fixedly arranged in the second groove and used for fixing the femur.
Preferably, the method further comprises:
And the clamping grooves are respectively arranged at the corresponding positions of the sides, away from the first femur, of the second femur.
The beneficial effects of the invention are as follows:
(1) The femoral condyle prosthesis suitable for female patients optimizes the width of the front condyle in the femoral condyle prosthesis, the thickness of the front condyle, the length of the front and rear diameters of the prosthesis at the outer side of the front condyle and the outer side of the first femur, the length of the front and rear diameters of the osteotomy at the inner side of the front condyle and the outer side of the first femur, the width of the inner and outer diameters at the far side of the first femur and the second femur, and the size of the Q angle at which the first femur, the second femur and the connecting block are connected with the tibial articular surface joint, and can be better suitable for female patients.
(2) Compared with the conventional femoral component, the female femoral component provided by the invention has thinner anterior condyle parts under the condition that the anterior and posterior diameters of the femoral component are the same, avoids tension of the patellofemoral joint in the knee joint buckling process, and increases the mobility of the femoral component.
(3) Compared with the conventional femoral component, the female femoral component provided by the invention has narrower anterior condyle and inner and outer side widths under the condition that the anterior and posterior diameters of the femoral component are the same, can avoid the cantilever beam effect of the prosthesis, can better cover the osteotomy surface of the femur, enhance the fixing effect of the prosthesis and avoid the loss of inner and outer side collateral ligaments caused by overlarge width of the femoral component.
(4) Compared with the conventional femoral component, the femoral component provided by the invention has a larger Q angle, can better adapt to the patella movement track of a female patient body, increases the knee joint mobility, and avoids dislocation of the patella.
Drawings
Fig. 1 is a schematic view of a femoral condyle prosthesis suitable for use in a female patient in accordance with the present invention.
Fig. 2 is a schematic view of a femoral condyle prosthesis suitable for use in a female patient in accordance with the present invention.
Fig. 3 is a schematic dimensional view of a femoral condyle prosthesis suitable for use in a female patient in accordance with the present invention.
Fig. 4 is a schematic dimensional view of a femoral condyle prosthesis suitable for use in a female patient in accordance with the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed in breadth and scope in accordance with the appended claims. In the drawings, the size and relative sizes of structures and regions may be exaggerated for clarity.
As shown in fig. 1-4, the present invention provides a femoral condyle prosthesis adapted for use in a female patient configured to articulate with a tibial articular surface and a patellar articular surface in a knee prosthesis, the femoral condyle prosthesis comprising: an anterior condyle 110, the lateral side of which is a cambered surface for articulation with the patellar articular surface; and a first femur 120 and a second femur 130, the outer sides of which are arc-shaped and are arranged in parallel on the same side, and are arc-shaped connected with the anterior condyle 110 to form a U-shaped structure; a connection block 140 connecting the first femur 120 and the second femur 130 which are adjacent to each other, the connection block being concaved in an arc shape inward to form a trochlear groove 148; the first 120, second 130 and connecting blocks 140 are articulated with the tibial articular surface.
The width a of the anterior condyle is 41-46 mm, and the thickness b of the anterior condyle is 0.8-9 mm; the anterior-posterior diameter c of the prosthesis between the lateral side of the anterior condyle and the lateral side of the first femur is 58-71.5 mm; the anterior-posterior diameter d of the osteotomy between the medial anterior condyle and the lateral first femur is 53-70.5 mm; the inner diameter and outer diameter width e of the far side of the first femur and the second femur is 57-72 mm; and the Q angle alpha of the connection of the first femur, the second femur and the connecting block with the tibial articular surface is 9-10 degrees.
Under the condition that the anterior and posterior diameters of the femoral condyles are the same, the thickness of the female femoral anterior condyle is smaller than that of the male femoral anterior condyle by 0.8mm on the outer side and 1.3mm on the inner side; under the condition that the anterior and posterior diameters of the femoral condyles are the same, the inner and outer diameters of the female femoral condyles are smaller than those of the male femoral condyles by 2mm; under the condition that the anterior and posterior diameters of the femoral condyles are the same, the width of the female femoral condyle is 3.5mm smaller than that of the male femoral condyle; with the same anterior-posterior femoral condyle diameter, the female femur Q angle is 3 ° greater than the male.
The first femur 120 and the second femur 130 each include a recess disposed inboard of the first femur 120 and the second femur 130, respectively, for attachment to the femur.
The groove includes: a first groove 150 disposed inside the junction of the first femur 120 and the anterior condyle 110 and the junction of the second femur 130 and the anterior condyle 110, respectively, the bottom surface of the first groove 150 being an inclined surface; the second grooves 160 are respectively disposed inside the first femur 120 and the second femur 130, and are located at the bottom of the U-shaped structure, and the bottom surface of the second groove 160 is a horizontal plane and is smoothly connected with the bottom surface of the first groove 150; and a third groove 170, which is respectively disposed at one end of the inner sides of the first femur 120 and the second femur 130, which is far away from the first groove 150, wherein the bottom surface of the third groove 170 is a vertical plane, and is smoothly connected with the bottom surface of the second groove 160.
The connection block 140 includes a flange 141, which is integrally formed on the inner side of the connection block 140, is located at the bottom of the U-shaped structure, and is horizontally disposed. The flange 141 includes: a fourth groove 142 provided in the center of the flange 141. The fourth groove 142 is one of rectangular and circular.
The connecting block further comprises: and a thickening ridge 143, which is disposed at the inner side of the joint of the connecting block and the anterior condyle 110, wherein the thickening ridge 143 is parallel to the bottom surface of the first groove 150, and the thickening ridge 143 is smoothly connected to the flange 141. A first fixing groove 144 is provided at the center of the thickening ridge 143, and a second fixing groove 145 is provided at one end of the inside of the connection block 140 away from the thickening ridge 143. The fixing pin 146 is cylindrical and fixedly disposed in the second groove 160. The femur can be fixed by the above-described structures of the first and second femur 120, 130 and the inner side of the connection block 140, and the femoral condyle prosthesis is prevented from being displaced or falling off.
And clamping grooves 147 which are respectively arranged at the corresponding positions of the first femur 120 and the second femur 130 at the sides far away from each other, are matched with a driving instrument for driving the femoral condyles into a human body.
Examples
CT scanning is randomly carried out on the knee joint femoral condyles of 10 adult females, a three-dimensional model is formed by reconstruction, 5 planes on the inner surface of the femoral condyle prosthesis are utilized to trim the three-dimensional model, 5 osteotomy planes are trimmed, the common femoral condyle prosthesis and the female femoral condyle prosthesis which correspond to the sizes of the femoral condyles are placed on the corresponding osteotomy planes, and the coverage rate of the common femoral condyle prosthesis and the female femoral condyle prosthesis on the anterior femoral condyle and the distal end of the femoral condyle is calculated respectively by utilizing three-dimensional drawing software. And respectively calculating the matching degree of the common femoral condyle prosthesis and the thickness of the front condyle of the female femoral condyle prosthesis and the thickness of the front condyle of the femur condyle under which the three-dimensional model is cut. The test results are shown in Table 1.
Table 1 test results
As can be seen from Table 1, the coverage of the female femoral condyle prosthesis to the female femoral condyle and the distal end and the matching degree of the thickness of the front condyle are superior to those of the common femoral condyle prosthesis.
Compared with the conventional femoral component, the female femoral component provided by the invention has thinner anterior condyle parts under the condition that the anterior and posterior diameters of the femoral component are the same, avoids tension of the patellofemoral joint in the knee joint buckling process, and increases the mobility of the femoral component.
Compared with the conventional femoral component, the female femoral component provided by the invention has narrower anterior condyle and inner and outer side widths under the condition that the anterior and posterior diameters of the femoral component are the same, can avoid the cantilever beam effect of the prosthesis, can better cover the osteotomy surface of the femur, enhance the fixing effect of the prosthesis and avoid the loss of inner and outer side collateral ligaments caused by overlarge width of the femoral component.
Compared with the conventional femoral component, the femoral component provided by the invention has a larger Q angle, can better adapt to the patella movement track of a female patient body, increases the knee joint mobility, and avoids dislocation of the patella.
The femoral condyle prosthesis suitable for female patients optimizes the width of the front condyle in the femoral condyle prosthesis, the thickness of the front condyle, the length of the front and rear diameters of the prosthesis at the outer side of the front condyle and the outer side of the first femur, the length of the front and rear diameters of the osteotomy at the inner side of the front condyle and the outer side of the first femur, the width of the inner and outer diameters at the far side of the first femur and the second femur, and the size of the Q angle at which the first femur, the second femur and the connecting block are connected with the tibial articular surface joint, and can be better suitable for female patients.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. A femoral condyle prosthesis adapted for use in a female patient configured to articulate with a tibial articular surface and a patellar articular surface in a knee prosthesis, the femoral condyle prosthesis comprising:
The outer side of the anterior condyle is a cambered surface and is used for being connected with the patellar articular surface joint; and
The outer sides of the first femur and the second femur are arc-shaped, are arranged on the same side in parallel, and are in arc connection with the front condyle to form a U-shaped structure;
The connecting block is used for connecting the first femur with the second femur which are close to each other, and is recessed in an arc shape inwards to form a pulley groove;
The first groove is respectively arranged at the inner sides of the joints of the first femur and the front condyle and the joints of the second femur and the front condyle, and the bottom surface of the first groove is an inclined surface;
the connecting block comprises a flange which is integrally formed on the inner side of the connecting block, is positioned at the bottom of the U-shaped structure and is horizontally arranged;
The thickening ridge is arranged on the inner side of the joint of the connecting block and the front condyle, is parallel to the bottom surface of the first groove and is smoothly connected with the flange;
a first fixing groove provided at the center of the thickened ridge portion;
the second fixing groove is arranged at one end of the inner part of the connecting block far away from the thickening ridge;
wherein the first femur, the second femur, and the connecting block are connected with the tibial articular surface joint;
Wherein the width of the front condyle is 41-46 mm, and the thickness of the front condyle is 0.8-9 mm; the anterior-posterior diameter of the prosthesis between the outer side of the anterior condyle and the outer side of the first femur is 58-71.5 mm; the anterior-posterior diameters of the anterior condyle inner side and the first femur outer side are 53-70.5 mm; the inner diameter and the outer diameter of the far side of the first femur and the second femur are 57-72 mm; the Q-angle at which the first femur, the second femur, and the connecting block articulate with the tibial articular surface is 9 o～10o.
2. The femoral condyle prosthesis for a female patient, as defined in claim 1, wherein said first femur and said second femur each comprise a recess disposed medial to said first femur and said second femur, respectively, for attachment to a femur.
3. The femoral condyle prosthesis suitable for use in a female patient in accordance with claim 2, wherein said groove comprises:
The second groove is respectively arranged on the inner sides of the first femur and the second femur, is positioned at the bottom of the U-shaped structure, and is horizontally arranged on the bottom surface and is smoothly connected with the bottom surface of the first groove;
And the third groove is respectively arranged at one end, far away from the first groove, of the inner sides of the first femur and the second femur, and the bottom surface of the third groove is a vertical plane and is in smooth connection with the bottom surface of the second groove.
4. The femoral condyle prosthesis suitable for use in a female patient in accordance with claim 3, wherein said flange comprises:
And a fourth groove provided at the center of the flange.
5. The femoral condyle prosthesis suitable for a female patient in accordance with claim 4, wherein said fourth groove is one of rectangular and circular.
6. The femoral condyle prosthesis suitable for use in a female patient in accordance with claim 5, further comprising:
The fixing nail is cylindrical and fixedly arranged in the second groove and used for fixing the femur.
7. The femoral condyle prosthesis suitable for use in a female patient in accordance with claim 6, further comprising:
And the clamping grooves are respectively arranged at the corresponding positions of the sides, away from the first femur, of the second femur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214404.5A CN109124832B (en) | 2018-10-18 | 2018-10-18 | Femoral condyle prosthesis suitable for female patient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214404.5A CN109124832B (en) | 2018-10-18 | 2018-10-18 | Femoral condyle prosthesis suitable for female patient |
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| CN109124832A CN109124832A (en) | 2019-01-04 |
| CN109124832B true CN109124832B (en) | 2024-05-03 |
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| CN201811214404.5A Active CN109124832B (en) | 2018-10-18 | 2018-10-18 | Femoral condyle prosthesis suitable for female patient |
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| CN105030384A (en) * | 2015-08-03 | 2015-11-11 | 北京威高亚华人工关节开发有限公司 | Total-knee-joint replacement prosthesis |
| CN204814288U (en) * | 2015-08-03 | 2015-12-02 | 北京威高亚华人工关节开发有限公司 | Full knee joint replacement false body |
| CN107647899A (en) * | 2016-07-26 | 2018-02-02 | 北京蒙太因医疗器械有限公司 | Osteotomy device for replacement knee in arthroplasty |
| CN209347324U (en) * | 2018-10-18 | 2019-09-06 | 北京四正医疗器械有限责任公司 | A kind of lateral femoral condyle prosthesis suitable for female patient |
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