Patent ID: 9668772
Date: 2017-06-06
CPC Classifications: A61B

Claim:
1. An atlantoaxial joint replacement device comprising: a rail member curved in a circular path with a path of curvature oriented in an axial plane around a vertical axis extending through both C1-C2 vertebrae at a dens location (odontoid process), the rail member comprising: a rider member slidingly coupled to the rail member, the rider member comprising a body defining a through slot through which the rail member is disposed, the through slot having a vertically elongated non-circular cross-sectional shape compatible to the non-circular cross-sectional shape of the track body of the rail member that introduces 1-5 mm of vertical translation of the rider member relative to the rail member, the rider member further comprising: wherein the atlantoaxial joint replacement device provides up to 90° (±45°) of bilateral axial rotational motion while stabilizing the C1-C2 vertebrae.