United Orthopedic Corporation

21 D. Patellar Preparation D.1. Inset Patellar Component Preparation There are two options for patellar component: Inset and Onset. Evert the patellar and remove excessive osteophytes. With a Caliper 35 , measure and record the thickness of the anterior-posterior dimension of the patella. NOTE : In planning the resection thickness, it is recommended to retain a 10 mm minimal thickness of retained patella bone to support the implant structure. The Patellar Sizing Ring 36 is used to determine the desired patellar diameter and positioning. Typically, the Ring is positioned over the highest point of the articulation and the center position is marked with a cautery or ink. 35 Caliper 9401-7012 36 Patellar Sizing Ring 9401-7002 2mm