Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 25282
MEDIUM-TERM RESULTS OF REVISION HIP ARTHROPLASTY USING A
FLUTED TAPERED MODULAR STEM
Youn-Soo PARK, Seung-Jae LIM, Kyung-Jea WOO
Samsung Medical Center, Seoul (KOREA)
Recent studies have shown good short-term outcomes of revision hip arthroplasty
using modular distal fixation stems, but, to our knowledge, none have included
clinical follow-up of greater than 5 years. We evaluated the results of 50 revision hip
arthroplasties performed using a fluted tapered modular stem. The mean age of
patients was 59 years (36 to 80). Five hips had Paprosky type-II femoral bone
defects, 31 had type-IIIA, and 14 had type-IIIB. Extended trochanteric osteotomy was
carried out in 24 hips (48%). Patients were followed both clinically and
radiographically for a mean of 7.2 years (5 to 10). The mean Harris hip score
improved from 41 points preoperatively to 89 points at final follow-up. Average stem
subsidence was 1.5mm. Three stems subsided more than 5 mm, but all have
stabilized in their new positions. During follow-up, a total of 4 hips required additional
surgery. One hip underwent two-stage re-revision due to deep infection, one had
liner and head exchange for alumina head fracture, and the other two underwent
isolated cup re-revision because of aseptic cup loosening and recurrent dislocation,
respectively. No repeat revision was performed due to aseptic loosening of femoral
stem. Complications included 6% intraoperative fractures, 4% cortical perforations,
and 4% dislocations. There was no stem fracture at the modular junction. Mediumterm
clinical results and mechanical stability obtained with this fluted tapered modular
stem were encouraging in these challenging revision situations with femoral bone
defects.
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