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Female knee joint prosthesis and design method thereof

A knee joint prosthesis and knee joint technology, applied in the direction of knee joints, elbow joints, joint implants, etc., can solve problems such as uncertain surgical effects, prosthetic loose knee joints, total knee joint defects, etc., to reduce surgical Posterior loosening and postoperative infection risk, improved motor function, and increased postoperative satisfaction

Pending Publication Date: 2022-04-05
河北春立航诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to statistical epidemiological studies, women account for about 2 / 3 of knee replacement patients, and about 20% of patients are uncertain or dissatisfied with the surgical efficacy, mainly because the structure of the existing total knee prosthesis is designed to be universal. There is no distinction between men and women, but the biological anatomy of men and women is very different at the knee joint, so there are obvious defects in the existing total knee joint, which leads to loosening of the prosthesis, anterior knee pain, and knee joint enlargement after implantation in women Occurrence of postoperative discomfort

Method used

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  • Female knee joint prosthesis and design method thereof
  • Female knee joint prosthesis and design method thereof
  • Female knee joint prosthesis and design method thereof

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Effect test

Embodiment 1

[0024] Example 1: Combining Figure 1-5 Shown, a kind of female knee joint prosthesis comprises femoral condyle 1, and described femoral condyle 1 comprises the outer surface of articulation and the inner surface that contacts with human bone, the outer surface of the anterior condyle part 10 of described femoral condyle 1 and the inner surface The maximum thickness between the surfaces is between 2.7, and the maximum width of the femoral condyle 1 is 55.2mm. The femoral condyle 1 includes a trochlear groove 11, and the deflection angle A of the trochlear groove is 10.5 degrees. The height of the lateral condyle 12 of the femoral condyle 1 is 10.1 mm, and the height of the medial condyle 13 is 5.1 mm. The female knee prosthesis with this structure is more in line with the bone structure of Chinese women, and 97% of female patients are satisfied with it in clinical practice.

Embodiment 2

[0025] Embodiment 2: Combination Figure 1-5 Shown, a kind of female knee joint prosthesis comprises femoral condyle 1, and described femoral condyle 1 comprises the outer surface of articulation and the inner surface that contacts with human bone, the outer surface of the anterior condyle part 10 of described femoral condyle 1 and the inner surface The maximum thickness between surfaces is 2.9mm. The maximum width of the femoral condyle 1 is 59.7 mm. The femoral condyle 1 includes a trochlear groove 11, and the deflection angle A of the trochlear groove is 12.5 degrees. The height of the lateral condyle 12 of the femoral condyle 1 is 10.5 mm, and the height of the medial condyle 13 is 4.9 mm. The female knee prosthesis with this structure is more in line with the skeletal structure of Chinese women, and 95.8% of female patients have received satisfaction in clinical use.

Embodiment 3

[0026] Embodiment three, combining Figure 6-7 As shown, the difference from Embodiment 1 or Embodiment 2 is that the inner surface of the femoral condyle is sprayed with a porous titanium bio-coating 14 , and the inner surface of the femoral condyle is provided with strip ribs 15 . The prosthesis can be better integrated with the human bone, which can reduce the amount of osteotomy and promote bone ingrowth. The strength and elastic modulus of the porous coating can be adjusted by changing the porosity to achieve the mechanical properties matching the repaired bone tissue, thereby reducing or eliminating the stress shielding effect and prolonging the service life of the implant. Ribs 15 are added inside the femoral condyle to strengthen the fixation ability between the femoral condyle prosthesis and human bones, prevent the prosthesis from loosening after implantation, promote bone ingrowth, and enhance the patient's postoperative knee joint use satisfaction.

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Abstract

The invention relates to the field of human bone knee joint prosthesis design, in particular to a female knee joint prosthesis and a design method thereof. The female knee joint prosthesis comprises a femoral condyle, the femoral condyle comprises a joint movement outer surface and an inner surface in contact with human bones, and the female knee joint prosthesis is characterized in that the maximum thickness between the outer surface and the inner surface of a front condyle part of the femoral condyle ranges from 2.7 mm to 2.9 mm, the maximum width value of the femoral condyle ranges from 55.2 mm to 59.7 mm, and the joint movement outer surface and the inner surface of the femoral condyle are in contact with each other. Compared with a traditional knee joint, the female knee has the advantages that the Q angle is increased, and the structure advantageously ensures that the optimized female knee better conforms to female skeleton characteristics and more scientifically conforms to female skeleton anatomy and biomechanical tracks, so that postoperative looseness and postoperative infection risks are reduced, and the postoperative satisfaction degree of a patient is increased.

Description

technical field [0001] The invention relates to the field of human bone and knee joint prosthesis design, in particular to a female knee joint prosthesis and a design method thereof. Background technique [0002] With the aging population trend, total knee replacement is increasingly used to treat joint diseases, and total knee replacement is usually regarded as the ultimate treatment for knee osteoarthritis or rheumatoid arthritis. It is widely used at home and abroad to treat knee joint pain and restore the walking function of the knee joint. At present, most of the knee joints at home and abroad are general-purpose knee joints, which consist of femoral condyle, tibial plateau pad and tibial plateau support. [0003] According to statistical epidemiological studies, women account for about 2 / 3 of knee replacement patients, and about 20% of patients are uncertain or dissatisfied with the surgical efficacy, mainly because the structure of the existing total knee prosthesis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
Inventor 岳术同李冉王华亭张莉
Owner 河北春立航诺新材料科技有限公司
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