Johnson & Johnson Professional, Inc.

C M Jayashankar

Salvatore Caldarise

Jorge A Ochoa

Anthony P Sanders

Frank D Matthews

Allan Ritchie

Frank R Foley

John W Besemer

An acetabular trial insert is provided in which the appropriate anteversion angle of the acetabular cup of a hip prosthesis may be determined automatically by placing an inner cup within an outer cup and providing a mechanism which will hold the inner cup in position after the trial has been reduced and the hip rotated through an intended range of motion.

Acetabular trial

An orthopedic device is provided having a femoral stem with a proximal end, a distal end, and an intermediate portion extending between the proximal end and the distal end. The intermediate portion tapers from a first cross-sectional geometry near the proximal end to a second cross-sectional geometry near the distal end. A surface region of the femoral stem has a coefficient of friction less than 0.3 with respect to a bone cement. The surface region can include a treated metal region integral with the stem, or a friction reducing coating or sheath that coats or covers a portion of the stem. A collar can be provided near the proximal end of the stem that has a greater diameter than the first diameter of the stem.

Femoral stem with reduced coefficient of friction with respect to bone

Growing community of inventors

Raynham, MA, United States of America

C M Jayashankar