Abstract
Introduction: The Arc2F is a cementless hemispheric threaded acetabular cup fabricated from titanium alloy (TI-6Al-4V) with a HA porous coating and dome holes for screws.
Materials and methods: We evaluated fifty one cups in forty nine patients under revision surgery. The average duration of follow-up was 9.8 years (range, 7–13 years). Mean age at time of revision surgery was 62.2 years (range, 41–76 years). 55.1% of the patients were women and 44.9% were men.
Preoperative diagnoses were: painful aseptic loosening in 41 cups (25 cementless and 16 cemented acetabular components), 8 acetabular protusio with unipolar hemiprosthesis and two cronic infections.
Acetabular bone deficiencies were classified as segmental in 19.6 %, cavitary in 37.3 % and combined in 43.1% according to the AAOS. Bone graft was used in 72.5 %.
Clinical and radiographic results were rated according to the Johnston et al and Merle D’Aubigne scores.
Results: The result was excellent in 60.8%, good in 29.4%, fair in 7.8%, and poor in 2%. At the time of the last follow-up, 76.5% were not painful.
The acetabular component was categorized as stable in 50 (98%), with two cases of migration in the first three months. Only one component was categorized as loose. No acetabular cup were removed or revised again.
Radiolucent lines were maximum in zone 5: 5.9% (Include the migrated component).
The most frequent complication was dislocation, which occurred in 3 hips (5.9%). Pelvic osteolysis was present in 5.9%.
Discussion: The Arc2F acetabular cup shows excellents results in revision surgery with a good primary fixation and long-term osseointegration.
Theses abstracts were prepared by Professor Roger Lemaire. Correspondence should be addressed to EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
