Early results of revision acetabular endoprosthetics using individual designs

Abstract

BACKGROUND: 3D-printed implants are one of the options for acetabulum reconstruction. The popularity of this technique is increasing every year. AIM: To evaluate the early clinical, radiological and functional results of revision arthroplasty using individual acetabular components in patients with acetabulum bone defects. MATERIALS AND METHODS: Revision endoprosthetics was performed in 50 patients. There were 36 female and 14 male patients. The patients mean age was 60.413.4 (2389) years. According to the Paprosky classification, the defects in 1 case corresponded to type IIC, in 12 cases to type IIIA, in 37 cases to type IIIB, including 8 cases with violation of the acetabulum integrity. Hip joint function was assessed using the Harris Hip Score (HHS), pain severity using the Visual Analogue Scale (VAS), and social adjustment using the Western Ontario and McMaster Universities Arthritis Index (WOMAC). RESULTS: Significant improvement was obtained on all assessment scales. The HHS score improved on average from 33.6 to 87.1 points, the VAS scale from 78.1 to 4.7 points, and the WOMAC from 75.8 to 11.6 points. There were 8 cases (21%) with complications in total. In one case with a violation of the acetabulum integrity we observed migration of the sciatic bone from the lower flange of the construct. CONCLUSION: Thus, the results of the acetabulum reconstruction using individually fabricated acetabular components are promising.