Cup positioning relative to the acetabular rim planned with three-dimensional computed tomography improves precision in total hip arthroplasty: a randomized controlled trial.

ABSTRACT:

Background

Accurate acetabular cup positioning is essential for successful total hip arthroplasty (THA) outcomes. The conventional mechanical alignment guide (MAG) method provides moderate accuracy. We developed a novel technique for cup positioning that utilizes preoperative three-dimensional computed tomography (3D-CT) planning based on the native acetabular rim's relative position and compared cup orientation between this method and the MAG technique.

Methods

A randomized controlled trial with 120 patients undergoing primary THA via the posterolateral approach targeted cup positions of 40° radiographic inclination (RI) and 20° radiographic anteversion (RA). The control group (n = 40) used a MAG for cup placement, while the study group (n = 80) utilized preoperative 3D-CT

SUBMITTER: Pongkunakorn A 

PROVIDER: S-EPMC11948801 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature