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Long-term results of the threaded Mecron cup in primary total hip arthroplasty: A 15-20-year follow-up study

In the 1970s, high failure rates of cemented acetabular components, especially in young patients, in the middle- and long-term prompted a search for alternatives. The Mecring was one of the most popular first generation uncemented, threaded cups widely used in the 1980s for arthroplasty of the hip....

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Bibliographic Details
Main Authors: Clarius, Michael (Author) , Jung, Alexander Wolfram (Author) , Streit, Marcus R. (Author) , Merle, Christian (Author) , Raiss, Patric (Author) , Aldinger, Peter (Author)
Format: Article (Journal)
Language:English
Published: 2010
In: International orthopaedics
Year: 2010, Volume: 34, Issue: 8, Pages: 1093-1098
ISSN:1432-5195
DOI:10.1007/s00264-009-0843-9
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/s00264-009-0843-9
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Author Notes:Michael Clarius, Alexander W. Jung, Marcus R. Streit, Christian Merle, Patric Raiss, Peter R. Aldinger

MARC

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520 |a In the 1970s, high failure rates of cemented acetabular components, especially in young patients, in the middle- and long-term prompted a search for alternatives. The Mecring was one of the most popular first generation uncemented, threaded cups widely used in the 1980s for arthroplasty of the hip. First generation threaded cups commonly had smooth surface treatment and showed unacceptably high failure rates in the mid-term. In a consecutive series of 209 patients, 221 threaded uncemented acetabular cups with smooth surface treatment (Mecring) had been implanted in combination with one type of uncemented stem. Patients were followed up clinically and radiographically. The mean time of follow-up was 17 (range 15-20) years. In 91 (41%) hips the acetabular component had been revised or was awaiting revision: two hips for infection and 84 (38%) for aseptic loosening. Five hips were awaiting revision. The survival rate for all revisions including hips awaiting revision was 49% (95% CI: 41-57%) at 17 years. These results support the view that smooth, threaded acetabular components do not provide satisfactory long-term fixation and should be abandoned. Patients with these components must be closely monitored as the failure rate remains high in the long-term. 
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