Abstract
Introduction
The goal of revision total hip arthroplasty (THA) for acetabular defects is to achieve the best stability and fixation with available host bone. Tritanium is a highly porous metal construct with a titanium matrix coating. We are reporting our experience of utilizing this material in patients with major acetabular defects.
Methods
Between February 2007 and August 2010, 24 consecutive hips (23 patients) underwent acetabular reconstruction using the Tritanium cups. The acetabular defects were assessed using the Paprosky classification. Anteroposterior and lateral radiographs were analyzed at follow-up based for the presence of radiolucent lines more than 2 mm in any of the 3 zones.
Results
Mean follow-up was 3.6 ± 1.1 years (range 1.5–5 years). There were 12 males and 11 females. The acetabular defects were type 2a (2 hips), 2b (3 hips), 2c (5 hips), 3a (8 hips), and 3b (6 hips). Two patients had pelvic dissociation. Mean anteversion and abduction angles were 43 ± 4.6 and 19.5 ± 4.4 degrees respectively.
All hips had radiographic evidence of osteointegration. Four hips had small demarcation at zones 1 and 3 (<1 mm), however, there were no hips with circumferential or more than 2 mm demarcation. There was no intra-operative fracture or post-operative dislocation, instability, or infection.
Discussion and Conclusion
The short-term results of titanium cups in major acetabular defects are encouraging. Our results demonstrate excellent safety and efficacy of this material in revision THA.
