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Publisher DOI: 10.1243/095441105X69079
Title: Lessons learned from early clinical experience and results of 300 ASR hip resurfacing implantations
Language: English
Authors: Siebel, Thomas 
Maubach, Stefan 
Morlock, Michael 
Keywords: Adolescent;Adult;Aged;Arthroplasty, Replacement, Hip;Comorbidity;Equipment Failure Analysis;Female;Femoral Fractures;Femur Head Necrosis;Germany;Humans;Incidence;Male;Middle Aged;Prosthesis Failure;Prosthesis-Related Infections;Reoperation;Risk Assessment;Risk Factors;Surface Properties;Treatment Outcome
Issue Date: Feb-2006
Publisher: Sage Publications
Source: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine 2 (220): 345-353 (2006-02)
Journal or Series Name: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine 
Abstract (english): Between August 2003 and April 2005, 300 ASR metal-on-metal resurfacing hip endoprostheses were implanted by the first author and a fellow surgeon. The mean age at surgery was 56.8 years (18-75.9 years) and mean body mass index was 27.6 kg/m2 (range, 19-41 kg/m2). The mean follow-up time was 202 days. The mean Harris hip score improved from 44 pre-operatively to 89 at 3 months post-operatively. In total, eight (2.7 per cent) cases [five neck fractures (1.66 per cent) and three cup revisions (1 per cent)] were revised. Two neck fractures occurred within a group of seven cases of femoral neck notching detected postoperatively; one neck fracture occurred out of two cases of incomplete seating of the femoral implant. A significantly higher (p < 0.001) failure rate was observed for patients who had undergone a previous osteosynthesis of the proximal femur (three revisions in a group of 15 patients). Revision cases had a significantly greater body mass index (p = 0.031). A learning curve was evident from the reduction in revisions from 5 in the first 100 surgical procedures to 2 in the next 100 and 1 in the last 100. These results show the importance of accurate surgical technique and careful patient selection for fourth-generation hip resurfacing implants.
DOI: 10.15480/882.1591
ISSN: 2041-3033
Institute: Biomechanik M-3 
Type: (wissenschaftlicher) Artikel
Permission Note: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
License: In Copyright In Copyright
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