Preoperative Demonstration with Full-Colour Scale 3D-Computed Tomography Salt Modelling in Total Hip Arthroplasty for Osteoarthritis with Post-Schanz Osteotomy: A Case Report

Abstract

 We created a full-scale and full-colour 3-dimensional salt model with computed tomography based data for a 69-year-old woman, who underwent Schanz osteotomy of her proximal femurs in her youth. We composed a preoperative simulation for evaluation and as a result, we chose the anterolateral supine approach. We transplanted the bulk femoral bone autograft to the acetabulum. We used the smallest size of Wagner type stem, Stellaris^® (Mathys), but the neck offset was still too long. We also performed advancement of the greater trochanter consistent with the Paavilainen method.

 Full-scale and full-colour 3-dimensional salt modelling was useful in the preoperative simulation and image training for the surgeon, but it was difficult to predict the soft tissue balances and to evaluate the intraoperative bone qualities.