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Journal of orthopaedics v.15 no.1, 2018년, pp.18 - 23  

30-years of experience with the cementless implanted Alloclassic total hip arthroplasty system—An ultra-long-term follow-up

Pisecky, Lorenz (Corresponding author. ) ; Hipmair, Günter ; Schauer, Bernhard ; Böhler, Nikolaus ;
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    Abstract Objective The aim of this study was to evaluate our long-term results with the ZweymUller hochgezogen and SL total hip arthroplasty system. This is the first study to provide a 30-year follow-up. Methods We reviewed 186 Alloclassic stem systems (ZweymUller hochgezogen (112) and SL (74), implanted in 179 patients from 1986 to 1987. Two different types of cementless acetabular components were used. 143 patients had died over the last 30years, so thirty out of 36 patients being still alive, with a mean follow-up of 29,48years (SD 0,51), were contacted by telephone and evaluated radiologically and clinically. Our loss-to-follow up was 16,7%. The mean age at follow-up was 83,57years (72,4–95,2; SD 6,77). Results If the endpoint is defined as the removal of the stem for aseptic loosening (3 cases), the overall survival rate is 98,38%. If the endpoint is revision for any reason (27 cases), the survival rate is 85,48%. Eleven patients needed an exchange of head and liner. The mean time from implantation until change of head and liner was 21,44years (SD 5,92). Most of the radiolucent lines and osteolytic zones were found in the proximal Gruen-zones 1 and 7 (69,7 and 21,2%). Conclusion After 30years of monitoring we can state that the evaluated system is very reliable in primary and secondary THA.


  • 주제어

    Total hip arthroplasty .   Long term follow up .   SL .   Alloclassic .   Stem.  

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