The Morscher Press Fit acetabular component.

A Nine- to 13-Year Review

D. P. Gwynne-Jones, FRCS, FRACS(Orth), Consultant Orthopaedic Surgeon*; N. Garneti, FRCS (Trauma & Orth), Fellow in Advanced Hip and Knee Surgery**; C. Wainwright, MB, BS, Specialist Registrar in Trauma & Orth*; J. A. Matheson, FRACS, Consultant Orthopaedic Surgeon*; and R. King, FRCS(Trauma & Orth), Lower Limb Arthroplasty Fellow*

* Department of Orthopaedics Dunedin Hospital, Great King Street, Dunedin 9024, New Zealand.

** Avon Orthopaedic Centre Southmead Hospital, Westbury on Trym, Bristol BS10 5NB, UK.

Journal of Bone and Joint Surgery - British Volume, Vol 91-B, Issue 7, 859-864.  doi: 10.1302/0301-620X.91B7.22013  Copyright © 2009 by British Editorial Society of Bone and Joint Surgery

Abstract - We reviewed the results at nine to 13 years of 125 total hip replacements in 113 patients using the monoblock uncemented Morscher press-fit acetabular component. The mean age at the time of operation was 56.9 years (36 to 74). The mean clinical follow-up was 11 years (9.7 to 13.5) and the mean radiological follow-up was 9.4 years (7.7 to 13.1). Three hips were revised, one immediately for instability, one for excessive wear and one for deep infection.

No revisions were required for aseptic loosening. A total of eight hips (7.0%) had osteolytic lesions greater than 1 cm, in four around the acetabular component (3.5%). One required bone grafting behind a well-fixed implant. The mean wear rate was 0.11 mm/year (0.06 to 0.78) and was significantly higher in components with a steeper abduction angle. Kaplan-Meier survival curves at 13 years showed survival of 96.8% (95% confidence interval 90.2 to 99.0) for revision for any cause and of 95.7% (95% confidence interval 88.6 to 98.4) for any acetabular re-operation.