Internal Rotation, Varus, and Anterior Femoral Component Malalignments Adversely Affect Patellofemoral Joint Kinematics in Patellofemoral Arthroplasty.

ABSTRACT:

Background

Patellofemoral arthroplasty (PFA) is reported to provide nearly normal PF joint kinematics but only with adequate surgical techniques. This study evaluated the effects of various femoral component settings on patellar component biomechanics.

Methods

A dynamic musculoskeletal computer simulation analyzed normal knee and standard PFA models, as well as 8 femoral component malposition models: 5° internal or external rotation, 5° valgus or varus, 5° extension or flexion, and 3-mm or 5-mm anterior positioning. Mediolateral patellar translation, lateral patellar tilt, and contact force and stress at the PF joint were measured in each model during gait.

Results

The patella in the standard PFA model was shifted up to 5.0 mm laterally near heel off and was tilted up

SUBMITTER: Yamawaki Y 

PROVIDER: S-EPMC10066524 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature