Customized bone-like trabecular structure knee joint prosthesis and manufacturing method

A knee joint prosthesis, trabecular structure technology, applied in knee joint, prosthesis, elbow joint, etc., can solve the problems of increasing patient burden, increasing production cost, increasing product weight, etc., to avoid bone resorption and prosthesis loosening , The effect of reducing the production cost and reducing the weight of the product

Inactive Publication Date: 2018-03-23
北京中安泰华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the knee replacement prosthesis, there is a rigid direct contact between the tibial component and the femoral component, that is, there is a rigid contact between the metal femoral condyle and the tibial plateau component and the polyethylene spacer, and the elasticity is achieved only by the weak deformation of the polyethylene material Function, the wear between the femoral condyle and the spacer is serious, which reduces the life of the spacer, and the weak deformation of the spacer cannot realize the function of the natural meniscus, which brings inconvenience to the patient after implanting it into the human body
[0004] The defect of the knee joint prosthesis in the prior art is that after the elastic component is added, the elastic fixed knee joint is realized, that is, th

Method used

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  • Customized bone-like trabecular structure knee joint prosthesis and manufacturing method

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Embodiment 1

[0034] As shown in the figure, this embodiment provides a knee joint prosthesis with a personalized bone-like trabecular structure and adaptive to the patient's living habits; Physiological curvature, while reducing stress shielding, avoiding bone resorption and prosthetic loosening, and also facilitating bone ingrowth in the later stage; in order to achieve the purpose of adapting to the patient's living habits, an induction sensor is specially installed on the tibial pad component. The device is used to sense the pressure between the femoral condyle and the tibial tray. The adjustment mechanism is installed on the tibial tray component to adjust the position of the femoral condyle and the tibial tray. The control mechanism, the sensing mechanism and the adjustment mechanism are all connected with the control mechanism. connected, the control mechanism receives the signal transmitted by the sensing mechanism to adjust the positions of the femoral condyle and the tibial tray. ...

Embodiment 2

[0042] The 3D printed personalized bone-like trabecular structure knee joint prosthesis provided in this embodiment is all 3D printed with PEEK material; the part of the prosthesis in contact with the tibial medullary cavity is a bone trabecular grid structure.

[0043] The manufacturing method of the customized personalized 3D printing 3D printing personalized bone-like trabecular structure knee prosthesis provided in this embodiment specifically includes the following steps:

[0044] S01, obtain medical image data: the patient undergoes knee joint CT examination, obtains all bone data in the operation area, and saves it in a format recognizable by medical images;

[0045] S02, Obtain the medical imaging parameters of the knee joint: Import all the bone models of the surgical area into the medical software Mimis18.0, reversely establish the three-dimensional model of the knee joint in the surgical area, and measure the impact parameters of the surgical area to obtain the anter...

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Abstract

The invention discloses a customized bone-like trabecular structure knee joint prosthesis, including a tibia holder and a tibia pad. A tibia medullary space is formed between the tibia holder and thetibia pad. The tibia medullary space is provided with a bone trabecular grid structure. Appearance of an upper end and a lower end of the knee joint prosthesis meets a human body anatomical structureand fits the medullary space. A PEEK material is used to reduce product weight, stress shielding is reduced, and conditions of bone resorption and prosthesis loosening are prevented. The tibia pad component is provided with an induction device, and an adjusting mechanism and a control structure are arranged in the tibia holder. An objective of installing the induction device is that through adjusting pressure between a femoral condyle and the tibia pad by the device, pressure of a gasket, applied by a femoral condyle prosthesis part, is better balanced, so that the inner side and the outer side of bones on a distal femur and a tibia near-end have uniform pressure. Bone loss and prosthesis failure caused by life styles and other factors are eliminated, and the knee joint prosthesis improvesmedium and long term life of a patient prosthesis.

Description

technical field [0001] The invention relates to the technical field of artificial knee joint replacement equipment, in particular to a personalized bone-like trabecular structure knee joint prosthesis. Background technique [0002] Osteoarthritis is a chronic inflammation with articular cartilage degeneration as the core, involving bone and including synovium, joint capsule and other joint structures. Diseases of the joints. With the increase of the average life expectancy and the aggravation of the aging population, the incidence of various bone and joint diseases, especially degenerative diseases, is increasing, and the most effective and successful method for the treatment of end-stage or severe knee joint diseases is artificial For knee arthroplasty, the current 10--15-year survival rate of TKA prosthesis is 85%-90%, which will significantly improve the patient's motor function and quality of life. [0003] In the knee replacement prosthesis, there is a rigid direct co...

Claims

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Application Information

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IPC IPC(8): A61F2/38
CPCA61F2/30942A61F2/38A61F2/3877A61F2/389A61F2002/30784A61F2002/30943A61F2002/30985
Inventor 初建宇罗爱民孙增辉
Owner 北京中安泰华科技有限公司
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