Revision Total Hip Arthroplasty for Pelvic Discontinuity

DeBoer, David K.; Christie, Michael J.; Brinson, Martha F.; Morrison, I. Craig
April 2007
Journal of Bone & Joint Surgery, American Volume;Apr2007, Vol. 89-A Issue 4, p835
Academic Journal
Background: Revision of a failed total hip arthroplasty with massive acetabular bone loss and pelvic discontinuity is a reconstructive challenge. This report presents the mid-term to long-term results of revision total hip arthroplasty with a custom-made porous-coated triflange acetabular prosthesis in a consecutive series of patients with pelvic discontinuity. Methods: Twenty-eight consecutive patients (thirty hips) with a failed total hip arthroplasty and pelvic discontinuity underwent revision total hip arthroplasty. The prosthesis was custom-manufactured on the basis of a three-dimensional model of the hemipelvis created with computed tomography. Initial stability of the implant was provided with screw fixation. Two patients did not return for follow-up after three months, and eight died and were followed for less than seven years, leaving twenty hips in eighteen patients followed for a mean of ten years. Harris hip scores and sequential radiographs were used to evaluate the clinical and radiographic results. Results: Definite healing of the pelvic discontinuity was indicated by the presence of bridging callus in eighteen of the twenty hips. There were no broken screws and no cases of implant migration, even when the discontinuity persisted. Small nonprogressive radiolucent lines were observed in six hips. Complications included one partial sciatic nerve palsy that resolved completely and one case of loose ischial screws in a radiographically stable implant in the same patient. Five patients had one or more dislocations postoperatively. The mean Harris hip score improved from 41 points preoperatively to 80 points at the time of the latest follow-up. Eleven of the eighteen patients required ambulatory aids postoperatively. No component was revised. Conclusions: Performance of a revision total hip arthroplasty with a custom triflange acetabular prosthesis to treat massive acetabular bone loss and pelvic discontinuity can provide a durable solution with good clinical results.


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