Abstract
The purpose of our study was to evaluate the initial results of this new technique of acetabular revision.
Osseointegration and cup stability were assessed by our musculoskeletal radiologist with radiographs at 2 years following surgery, and patients’ clinical outcomes were reviewed. We retrospectively reviewed the clinical records and radiographs of all patients who underwent acetabular revision between 2003 to 2005. Patient’s clinical outcomes and records were extracted from Orthowave and Statwave software. Radiographs were digitised and evaluated by our radiologist on E-film workstation.
Between January 2003 to May 2005, 62 consecutives patients with 65 acetabulum revisions (3 bilateral) were performed by a single surgeon. All acetabular shells were revised to revision tantalum shells with ancillary screws fixation. Fenestrated tantalum augments and wedges of different sizes and shapes were used to address bone defect in our series. 30.7% were Paprosky grade 3 and worse, 21.5% were Paprosky grade 2C. Radiologic review showed none of the cups had a change of 3° or more for cup inclination. There was no migration of the cups of 2 mm or greater both in the vertical direction and horizontal direction from our reference lines during the 2 year period. There were no new radiolucencies in any cases, and all the 9 cups with radiolucent lines post op either filled up or remain unchanged. Postoperative review mean HHS was 79.09 ± 16.16 (Range 33–100). There were 3 cases (4.6%) of dislocation. There were 9 fractures (13.9%) in our series.
In our series of 65 revisions, the porous tantalum revision system has performed well, despite being used to reconstruct fairly significant defects (Paprosky 2C and worse) in 52.3% of our cases. The clinical improvement, stability of the cup at 2 years, and acceptable complication rates would suggest that this porous tantalum system can be an alternative to a more traditional acetabular reconstruction.
The abstracts were prepared by David AF Morgan. Correspondence should be addressed to him at davidafmorgan@aoa.org.au
Declaration of interest: c – In relation to the conduct of this study, one or more the authors have received, or are likely to receive direct material benefits.
