Rotary mill

a rotary mill and milling machine technology, applied in the field of rotary mills, can solve the problems of post-operative pain, damage to bearings, and more design requirements for partial knee replacement prostheses than those for total knee replacement prostheses, and achieve the effect of avoiding excessive bone removal and precise bone removal
US20160235415A1Inactive Publication Date: 2016-08-18BIOMET UK HEALTHCARE
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BIOMET UK HEALTHCARE
Publication Date
2016-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A rotary mill (2) comprising a body portion (4) having a milling surface (10) for milling a first bone, a guide portion (6) having a guide body (22), and inter-engageable guide formations (20, 24) formed on the body portion (4) and guide portion (6), the guide body (22) having a projection (7) which is adapted to hold a second bone (11) away from the rotary mill during the milling operation.
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Description

[0001] The present invention relates to rotary mills and similar rotary cutting devices and particularly but not exclusively relates to rotary mills for use in preparing a bone for total or partial joint replacement surgery.BACKGROUND

[0002] It is known to replace all or part of a knee joint in which the joint surfaces have deteriorated, for example as a result of osteoarthritis. Such deterioration usually starts in only one of the tibeo-femoral compartments and may spread to the other at a later stage. Replacement of only one compartment of the joint can therefore be sufficient to provide prolonged relief from symptoms. Damaged bearing surfaces are replaced by a unicompartmental prosthesis which comprises a femoral implant and a tibial implant (usually metallic), which interface through a (polyethylene) bearing component disposed between the two implants.

[0003] A unicompartmental or partial knee replacement (PKR) helps to conserve undamaged bone and restores more natural movement to th...

Claims

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