Total Hip Arthroplasty With A Monoblock Conical Stem In Dysplastic Hips: A 20-Year Follow-Up Study

Abstract Background Total hip arthroplasty in patients hip dysplasia is challenging as a result of complex anatomic deformities in the hip. The aim of the study was to evaluate the survivorship, the clinical and radiographic outcomes of cementless Wagner Cone stem in patients with dysplastic hip. Methods This retrospective study reports on 102 patients (135 hips) undergone total hip arthroplasty between 1993 and 1997. The mean age of patients was 51 years (range, 21-73). Minimum follow-up was 20 years. According to the Crowe classification, 38 hips presented dysplasia of grade I, 41 of grade II, 37 of grade III and 19 of grade IV. Results Kaplan-Meier survivorship for aseptic loosening was 97% (95% confidence interval, 94.4-99.6) at 20 years. The average HHS increased from 43.4 points (range, 22–51) to 86.4 points (range, 39–100) (p Conclusion Monoblock Wagner Cone stem is a reliable option in dysplastic hip with a excellent survivorship and good clinical and radiographic outcome in the long term.