Extra-large press-fit cups without screws for acetabular revision.
This retrospective study reports the 4- to 6-year results of clinical and radiologic follow-up of 60 acetabular revisions using extra-large hemispherical press-fit cups without additional screw fixation. Bone grafts were used in 17 cases. One cup loosened and required re-revision after 12 months. Initial migration was noted in 6 cases, but showed no progression after less than 2 years. In 2 hips that were revised for deep infection, the cups were found incorporated. At final follow-up, 57 hips (95%) were found firmly fixed radiologically. The Harris Hip score improved from a mean of 58.7 points preoperatively to 90.6 points. Provided a high friction coefficient is present, extra-large hemispherical cups offer sufficient stability even in severe cases. Most do not require additional screw fixation.
Department of Orthopaedic Surgery, Otto Wagner Spital, Baumgartner Höhe, Sanatoriumstrasse 2, A-1145 Vienna, Austria.
Christian
C
Obenaus
H
H
Winkler
R
R
Girtler
M
M
Huber
W
W
Schwägerl
D000077:Acetabulum / Q000473:pathology; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods; D001863:Bone Screws; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies