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Unicondylar meniscal bearing knee replacement

A knee joint replacement, meniscus technology, applied in the direction of knee joint, elbow joint, joint implant, etc.

Inactive Publication Date: 2014-02-05
BIOMET UK +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pain may also be present in the larger bearings, which require greater force from the surgeon's thumb to perform the graft

Method used

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  • Unicondylar meniscal bearing knee replacement
  • Unicondylar meniscal bearing knee replacement
  • Unicondylar meniscal bearing knee replacement

Examples

Experimental program
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Embodiment Construction

[0052] figure 1 A right leg femur 10 is shown having a medial 12 and a lateral 14 condyle, a tibia 16 , and a medial unicondylar graft 18 . The implant consists of three components: a metal tibial disc, component 20 , a metal femoral prosthesis 22 , and a plastic material (eg, ultrahigh molecular weight polyethylene, UHMWPE) meniscus bearing 24 . The materials mentioned are commonly used but not required.

[0053] The bottom surface of the meniscus bearing 24, i.e. the second surface, is flat or generally flat; top surface.

[0054] Figure 2a and Figure 2b schematically show figure 1 meniscus bearings. In this embodiment, the meniscus bearing 24 has a rear protrusion 40 , a front protrusion 42 , and two generally parallel sides 44 . The meniscal bearing 24 has a flat bottom 46 forming the second surface, and a centrally concave upper portion 48 forming the first surface. The thickness of this bearing at the front and rear ends (refer to Figure 2b t in max ) may be...

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Abstract

A kit of parts for use in unicondylar meniscal bearing knee replacement comprises a plurality of meniscal bearings, each meniscal bearing comprising a body defining a dished first bearing surface on one side thereof and a second surface on an opposing side of the body. Each meniscal bearing has an entrapment between 3.2mm and 3.8mm. Meniscal bearings and methods of performing unicondylar meniscal bearing replacements are also described.

Description

technical field [0001] The invention relates to a complete set of components applied to knee joint replacement with unicondylar meniscus bearing, a meniscus bearing used for knee joint replacement with unicondylar meniscus bearing, and a method for implementing knee joint replacement with unicondylar meniscus bearing. Background technique [0002] The knee consists of three interconnected joints in three separate compartments, all surrounded by a fibrous capsule and covered with skin. The medial tibio-femoral joint is concerned with the connection between the thigh bone (femur) and the leg bone (tibia) located inside the lower body. The lateral tibio-femoral joint is concerned with the connection between the femur and the tibia, located on the outside of the lower extremity. The patella-femoral joint is concerned with the connection between the femur and the kneecap (patella) on the front of the lower extremity. [0003] The anterior aspect of the lower end (tip) of the fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38A61F2/30
CPCA61F2/4684A61F2002/30616A61F2002/30934A61F2/3868A61F2002/3895A61F2/30A61F2/38
Inventor 约翰·欧康纳约翰·古德费洛克里斯·亚历山大·多德大卫·威克利夫·默里
Owner BIOMET UK