Sulzer Orthopedics Inc.

Intermedics Orthopedics, Inc.

Adriana De La Barcena

Donald W Dye, Jr

Mark L Arlitt

Donald W Dye

Kenneth J Gardner

Stephen W Haecker

Steven L Van Der Meulen

Amber E Okoye

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.

Orthopedic trial prosthesis and saw guide instrument

An apparatus for disassembling a head and acetabular component of a bipolar orthopedic hip prosthesis. The head includes a female taper configured for engaging a corresponding male taper of a femoral component of a hip prosthesis. The acetabular component includes a cavity in which the head is elastically constrained. The apparatus includes a rod having a male taper at one end thereof sized and configured to be received in taper locking engagement in the female taper of the head of the bipolar prosthesis. The rod has external threads that engage internal threads of a sleeve surrounding the rod. The sleeve includes a thrust surface at one end that engages the acetabular component as the sleeve is rotated relative to the rod. The sleeve causes the acetabular component to be pressed off of the head while the head remains taper locked to the rod. Continued rotation of the sleeve causes the head to be pressed off of the taper of the rod. A handle attached to the rod facilitates gripping the rod and preventing its rotation while the sleeve is being rotated.

Instrument for disassembling a bipolar hip prosthesis

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Austin, TX, United States of America

Adriana De La Barcena