Sulzer Orthopedics Inc.

Stephen W Haecker

Donald W Dye

Adriana De La Barcena

A trial prosthesis and saw guide system for use in orthopedic surgery to implant an orthopedic calcar-replacing femoral hip prosthesis. A trial femoral hip stem includes a longitudinal axis, a proximal portion and a distal portion, and a neck portion for temporarily receiving a trial femoral head. The proximal portion includes an elongate saw guide slot substantially parallel to the longitudinal axis. A trial femoral hip flange is provided for temporary insertion within the saw guide slot. An elongate rotary reamer is provided for reaming a socket in the medullary canal to receive the hip prosthesis. An elongate driver adapter has means at a proximal end for connection to a powered rotary driver and has means at a distal end for connection to the elongate rotary reamer. An osteotomy guide has means for connection to the elongate driver adapter for rotary motion about the axis of the driver adapter, and includes a saw guide having a saw capture slot for capturing a saw blade to control the plane of cutting of the saw blade. The saw capture slot is oriented substantially perpendicular to the axis of the elongate driver adapter. Markings are provided on the osteotomy guide that align with the proximal extent of the greater trochanter to indicate that the saw guide slot is disposed in the proper plane. Means are provided on the osteotomy guide and driver adapter for controlling the axial position of the osteotomy guide relative to the driver adapter.

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Austin, TX, United States of America

Stephen W Haecker