[Radiographic measurements of acetabular component orientation with Widmer´s method in total hip arthroplasty. Descriptive case series].

Abstract

Introduction: total hip arthroplasty (THA) is one of the most performed surgeries worldwide, with high satisfaction rates. The orientation of the acetabular component has a direct impact on the risk of dislocation, recently with the support of robotic surgery the margin of error in implant placement has decreased; however, the conventional technique even without fluoroscopic support continues to have satisfactory results within the safety zone.

Material and methods: retrospective, cross-sectional, descriptive case series of patients treated with THA at Hospital General Xoco between 2022 and 2024. Degrees of anteversion and inclination were measured with Widmer's method on postoperative radiographs.

Results: the radiographs of 113 patients were studied, 80 female and 33 male, with a mean age of 63.2 ± 13.01 years (95% CI: 60.6-65.4), a mean inclination of 42.2° ± 8.1° (95% CI: 40.7-43.2) and anteversion of 14.3° ± 8.5° (95% CI: 12.5-15.4); 76% of the population was within Lewinnek safe zone; by etiology: osteoarthrosis 74%, sequelae of dysplasia 68% and intracapsular fracture 82%; difference between the values of the affected side: left 65%, right 83%, of 3.9° and 4.7°/6.4o and 9° in relation to the overall values of the population.

Conclusion: in our population undergoing THA, without the use of robotic technique or support of imaging studies, anteversion and inclination figures were recorded within the Lewinnek safety parameters with a conventional method.