Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 24990
MID-TERM RESULTS OF REVISION HIP ARTHROPLASTY WITH STABLE STEM
RETAINED DURING ISOLATED ACETABULAR REVISION
Kakunoshin YOSHIDA, Masahiro HASEGAWA, Hiroki WAKABAYASHI, Akihiro
SUDO
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine,
Tsu (JAPAN)
INTRODUCTION: The purpose of the present study was to evaluate the mid-term
results of retained stable stem during revision of the acetabular component.
MATERIAL AND METHODS: We retrospectively reviewed the clinical and
radiographic results for 21 patients (22 hips) who underwent revision of the
cementless acetabular component without removal of a stable stem between July
2001 and September 2006. There were 4 men (4 hips) and 17 women (18 hips). The
mean age at the time of the revision was 63 years with the mean weight of 56 kg.
The mean follow-up after the acetabular revision was 5.3 years (3-8 years) and the
mean follow-up after the initial operation was 14.4 years (6-21 years) Radiographs at
the time of the revision were used to determine the degree of femoral bone loss
according to the classification system of Paplosky. The defects included 18 Type I, 4
Type II. RESULTS: The mean Japanese Orthopaedic Association score significantly
improved from 55 to 78 points. Twenty-one (95%) of the primary stem were judged to
be stable and well-fixed at the final follow-up. Only one stem (5%) was unstable
fixation because of progresive subsidence. At the prerevision radiological findings, 11
hips exhibited osteolysis, 8 hips exhibited stress shielding (grade II). At the final
follow-up, one hip had been appeared osteolysis and one hip had evidence of
progressive stress shielding. CONCLUSIONS: Clinical results of this study
suggested that a stable fixed stem could be retained successfully in the revision hip
arthroplasty.
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