Learning from the learning curve in total hip resurfacing: a radiographic analysis

Background Operation of hip resurfacing prosthesis is a technically demanding procedure accompanied by a learning curve. To our knowledge no objective data on this learning curve are available in the literature. Methods For the first 40 resurfacing hip prostheses implanted by a single-surgeon radiog...

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Bibliographic Details
Published in:Archives of orthopaedic and trauma surgery 2009-10, Vol.129 (10), p.1293-1299
Main Authors: Witjes, Suzanne, Smolders, José M. H., Beaulé, Paul E., Pasker, Pieternel, Van Susante, Job L. C.
Format: Article
Language:English
Subjects:
Adult
Aged
Analysis of Variance
Arthroplasty, Replacement, Hip - standards
Clinical Competence
Female
Hip Joint - diagnostic imaging
Hip Joint - surgery
Hip Prosthesis
Humans
Male
Medicine
Medicine & Public Health
Middle Aged
Orthopaedic Surgery
Orthopedics
Prosthesis Fitting
Radiography
Treatment Outcome
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Summary:Background Operation of hip resurfacing prosthesis is a technically demanding procedure accompanied by a learning curve. To our knowledge no objective data on this learning curve are available in the literature. Methods For the first 40 resurfacing hip prostheses implanted by a single-surgeon radiographic ‘learning curve’ analysis was performed. Optimal implant positioning on preoperative digital templating was compared with the eventual implant position postoperatively, measured by six establishes radiographic parameters and compared for four chronological cohorts of patients. Results A learning curve was clearly present and an optimal result was established in the last cohort. Pitfalls were a relatively steep cup position initially and a stem position in the posterior 1/3 of the collum. Besides marginal medialization a fully anatomic reconstruction of the center of rotation was achieved. Conclusion In total hip resurfacing one should recognize the presence of a learning curve. This learning curve appears to be acceptable and a reproducible optimal implant positioning can be achieved quickly.
ISSN:0936-8051
1434-3916
DOI:10.1007/s00402-009-0875-z