Acetabular version angle measurement in 3D vs. 2D models using computed tomography images in patients with coxarthrosis A single-center observational study.

Abstract

Introduction: In Ecuador, approximately 70% of the inhabitants present coxarthrosis, whose treatment in advanced stages is total hip arthroplasty, which, because of its correct location, requires the measurement of the acetabular anteversion angle. The present study compares the 3D method (gold standard) vs. 2D method for measuring this angle.

Methods: This was an analytical, retrospective observational study. Based on the STROBE guide.

Results: Arithmetic means 3D right hips: 17.2 gr VS 2D: 16.4 gr; 3D left hips: 18.7 gr VS 2D: 18.9 gr; Student's t-test P value right hip 0.68 and left hip 0.92. The results of the weighting coefficient Spearman's right hips 3D vs. 2D weak classification; 3D vs. 2D left hips moved moderately to strongly, as demonstrated by scatter plots.

Conclusions: There was a difference in the arithmetic means between the 3D and 2D methods; the results of both methods were significantly different, with an ascending and linear trend that was directly proportional.