Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 25389
ASSESSMENT OF PROXIMAL FIXATION FEMORAL STEMS FOR PRIMARY
THR.
Nikolai ZAGORODNIY, Inar SEIDOV, Kyrillos HADJICHARALAMBOUS, Denis
ELKIN, Andrei KARDANOV, Levon MAKINYAN, Timofei SKIPENKO, Sergei
BEZVERKHIY
Peoples’ Friendship University of Russia, Chair of Traumatology & Orthopaedics,
Moscow (RUSSIA)
Our study is based on the results of 147 patients, treated by THR, using 189 proximal
fixation femoral components: 60 cases of Versys ET (Zimmer, USA), 43 - Versys FM
(Zimmer, USA), 33 - Mallory Head (Biomet, USA) and 11 cases of Bicontact
(Aesculap, Germany). Functional and statistical methods were applied to assess the
condition of the operated joint. The Versys ET group included 19 women and 41
men; Versys FM - 13 women and 30 men; Mallory Head - 16 women and 17 men
and Bicontact - 3 women and 8 men. Mean age was: Versys ET -57,1 ±10,3 years;
Versys FM - 56,7 ± 8,4; Mallory Head - 58,4 ± 11,9 and Bicontact - 57,1 ± 9,6. The
indications for THR were: primary coxartrosis, dysplastic coxartrosis and AVN.After
careful study of post-op X-Rays at the final follow up, we noted only 3 cases of
proximal stress shielding. The possibility of micromotion at the distal end of the stem
allows for more physiological distribution of loading in comparison with intermediate
and distal fixation stems. There were no cases of radiographic or clinical
manifestation of aseptic stem instability in any of the studied groups. The survival
rate at 6 years for all groups was 100 % with stem revision as the end-point. In all
groups with a maximum of 6 years follow up, we noted 95% good and excellent
results.
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