Surface Hippy A Patient to Patient Guide to Hip Resurfacing

Surface Hippy

A Patient to Patient Guide About Hip Resurfacing

Surface Hippy is Patricia Walter's Personal Project to help people lean about Hip Resurfacing
Patricia is the fulltime author, editor, webmaster and owner of the site

 

Hip Resurfacing Learning Curve for ASR

Lessons learned from early clinical experience and results of 300 ASR® hip resurfacing implantations

Journal

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine </content/0954-4119/

Publisher

Professional Engineering Publishing

ISSN

0954-4119

Issue

Volume 220, Number 2 / 2006 </content/t8263g0007xn/

DOI

10.1243/095441105X69079

Pages

345-353

 AuthorsT Siebel, S Maubach, M M Morlock

Abstract

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.

Keywords in English

resurfacing, fourth generation, hip, revision, ASR

 

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Mission Statement - Surface Hippy is a patient to patient guide to hip resurfacing. It does not provide medical advice. It is designed to support, not to replace, the relationship between patient and clinician.
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