MEDIUM-TERM RESULTS OF CEMENTLESS TOTAL HIP ARTHROPLASTY OF THE DYSPLASTIC HIP

This study presents the authors' medium term results with total hip arthroplasty of the dysplastic hip using cementless press-fit and threaded acetabular components. They included a number of 228 patients who underwent cementless total hip arthroplasty in their clinic between January 2005 and January 2010. Press-fit acetabular cups were implanted in 195 of these cases, while the rest of 48 cases received threaded cups. mean follow-up was of 6.4 years. Hip dysplasia was classified as crowe type I in 109 hips (44.86%), crowe type II in 102 hips (41.98%), crowe type III in 29 hips (11.93%) and crowe type IV in 3 cases (1.23%). The harris hip score showed improvements in all cases, with no statistically significant differences between the two types of acetabular components. During the follow-up period, the authors have observed radiological signs of loosening in 5 cases (2.05%), of which one was a case of acetabular component mobilization, and 4 cases were femoral stem mobilizations. In all of these cases revision arthroplasty was performed.