New Test Method for Fatigue Test Method to Assess the Strength of a Posterior-Stabilized Femoral Component Insert Post
1. Scope
This standard is intended to provide a test method to assess the fatigue strength of a tibial insert post for a posterior-stabilized knee replacement.
Keywords
Replacement; Fatigue; Knee; Insert; Post
Rationale
Fractures of tibial insert posts, although rare, have been reported in the literature. Particularly with the advent of crosslinked inserts in knee replacements to decrease wear, there can be a subsequent decrease in material properties. A new posterior-stabilized (PS) insert design should be assessed to minimize the risk of in vivo post fracture. While this can be done virtually through design controls, and simulations, a mechanical fatigue test is useful to simulate potential real world worst-case scenarios which the post could experience.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 11-11-2025
Technical Contact: Erik Woodard
Item: 000
Ballot:
Status: