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Single-condylus prosthesis

A prosthesis, unicondylar technology, applied in the field of medical devices, can solve the problems of easy rotation of tibial tray and femoral condyle, poor positioning effect of tibial tray and femoral condyle, and high revision frequency, and achieves good positioning effect, low revision frequency, and connection. solid effect

Inactive Publication Date: 2014-10-01
SHANDONG WEIGAO ORTHOPEDIC DEVICE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The positioning effect of the tibial tray and femoral condyle of the existing unicompartmental prosthesis is poor. After implantation in the human body, the tibial tray and femoral condyle are easy to rotate, and the revision frequency is high

Method used

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  • Single-condylus prosthesis
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Examples

Experimental program
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Effect test

Embodiment Construction

[0013] Such as figure 1 , 2 The unicondylar prosthesis shown in 3 includes a tibial tray 5, a tibial pad 6 and a femoral condyle 3. The cross-section of the tray of the tibial tray 5 is L-shaped, and the tibial pad 6 is slidably arranged on the upper side of the tibial tray 5. The femoral condyle 3 is in the shape of an arc that matches the condyle of the femur. The upper side of the tibial pad 6 is provided with an arc-shaped chute that matches the femoral condyle. The femoral condyle 3 is slidably arranged in the arc-shaped chute. The structure is the same as the prior art, so it will not be repeated. The present invention is characterized in that at least three fixed posts 7 that are not on the same straight line are provided on the underside of the tibial tray 5, from image 3 It can be seen that there are three fixed posts 7 on the underside of the tibial tray, and the three fixed posts 7 are triangularly distributed on the underside of the tibial tray. The triangularly dis...

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Abstract

A single-condylus prosthesis relates to medical instruments, comprises a shinbone support, a shinbone cushion and a femur condylus, and is characterized in that three or more fixing columns not in the same straight line are arranged on the lower side surface of a support board of the shinbone support; the fixing columns are arranged on the inner sides of the femur condylus; positioning nails are arranged around the fixing columns on the inner sides of the femur condylus; an anti-rotation rib which has a rectangular cross section and is parallel to the fixing columns for the femur condylus is arranged on the inner sidewall of the femur condylus. When the single-condylus prosthesis is used, the shinbone support is fixedly connected with a shinbone via the fixing columns on the lower side surface of the support board, the femur condylus is connected with the a femur via the fixing columns on the inner side, the positioning nails around the fixing columns and the anti-rotation rib, the shinbone support and the femur condylus are well positioned and are unlikely to rotate. The single-condylus prosthesis is simple in structure, firm in connection and low in overhaul frequency.

Description

Technical field [0001] The invention relates to a medical device, in particular to a unicondylar prosthesis with good positioning effect of tibial tray and femoral condyle and not easy to rotate. Background technique [0002] We know that unicondylar knee replacement has the characteristics of less bone removal, less foreign body implantation, short operation time, and easy revision. As a minimally invasive joint replacement surgery, it has been increasingly accepted by patients and doctors. Currently, the unicondylar prosthesis used in unicondyle replacement includes tibial tray, tibial pad and femoral condyle. The tibial tray is provided with a support plate with an L-shaped cross section, and a strip-shaped fixed corrugation is provided on the underside of the support plate. The tibial pad is a symmetrical quadrilateral, which is slidably arranged on the upper side of the tibial tray; the femoral condyle is in the shape of an arc that matches the condyle of the femur. The upp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
CPCA61F2002/30001A61F2/38
Inventor 于秀淳张涌泉王晗魏悦高原
Owner SHANDONG WEIGAO ORTHOPEDIC DEVICE COMPANY
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