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System and method for adjusting the thickness of a prosthesis

A technology of prosthesis and tibia, which is applied in the system field of adjusting the thickness of the prosthesis, which can solve the problems of implant company loss and difficult re-sterilization of implants, etc.

Inactive Publication Date: 2009-09-02
EXACTECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because implants produced from UHMWPE are not easily re-sterilized, returned implants are often a loss to the company

Method used

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  • System and method for adjusting the thickness of a prosthesis
  • System and method for adjusting the thickness of a prosthesis
  • System and method for adjusting the thickness of a prosthesis

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Embodiment Construction

[0036] Specific embodiments of the present invention will be described herein; however, it should be understood that the embodiments described herein are merely exemplary of the present invention, which may take various forms. Furthermore, each example associated with each given embodiment of the present invention is illustrative rather than restrictive. Furthermore, the figures are not necessarily to scale and some features may be exaggerated in order to show particular component details. Therefore, specific structural and functional details disclosed herein are not set forth as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0037] In one embodiment, in addition to using a thick tibial insert in the case of a large gap between the resected tibia and femur, a tibial septum between the tibial tray and tibial insert can be used to accommodate the composite tibia thickness (ie, the thickness of the ...

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Abstract

The present invention relates to a system and method for adjusting a thickness of a prosthesis. A knee prosthesis for implantation may be provided, comprising: a tibial tray, wherein the tibial tray comprises an upper surface and a lower surface, and the lower surface of the tibial tray is disposed adjacent a tibia of the patient; a tibial insert, with an upper surface and a lower surface; a tibial spacer, with an upper surface and a lower surface. The spacer is disposed between the tibial tray and the tibial insert such that the lower surface of the tibial spacer is adjacent the upper surface of the tibial tray and the upper surface of the tibial spacer is adjacent the lower surface of the tibial insert; and at least one locking mechanism, wherein the locking mechanism locks the tibial spacer to the tibiat tray to form a locked spacer / tray assembly.

Description

technical field [0001] The present invention relates to a system and method for adjusting the thickness of a prosthesis (eg, a knee implant). Background technique [0002] During the Knee Society meeting on February 26, 2005, Dr. Gerard Engh presented research on the durability of ultra-high molecular weight polyethylene (UHMWPE) from different sources. He used multiple regression analysis to determine the relative distribution of several factors in the durability of nearly 2000 total knee implants and more than 440 unicondylar implants. Its research concluded that more than 50% of the durability can be attributed to the extended shelf life of UHMWPE. [0003] In this regard, thicker tibial inserts are rarely used. As a result, these implants are often associated with long shelf life days at the time of surgery, assuming the part is ever used. As a result, thicker tibial inserts were associated with greater durability. According to the Exactech Sales Report, surgeons use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
CPCA61F2/3886A61F2/30734A61F2002/305A61F2/30724A61F2/389A61F2002/30604A61F2002/30616
Inventor L·安吉博A·塞德尔
Owner EXACTECH INC
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