Alpha angle correction in femoroacetabular impingement View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2013-09-21

AUTHORS

Darren de SA, Nathan Urquhart, Marc Philippon, Jung-Eum Ye, Nicole Simunovic, Olufemi R. Ayeni

ABSTRACT

PurposeThe predictive value of the alpha angle, currently the most validated magnetic resonance imaging parameter for CAM-impingement FAI, remains to be systematically evaluated in the orthopaedic literature. A systematic review was conducted to determine whether alpha angle correction influences clinical outcomes in patients with FAI.MethodsWe searched three databases (MEDLINE, EMBASE and PubMed) for English clinical studies published up to August 2012, reporting surgical correction of the alpha angle in patients with a primary diagnosis of FAI. Two independent assessors reviewed eligible studies. Where applicable, the Newcastle–Ottawa Scale was used to perform a quality assessment. Descriptive statistics are presented.ResultsOf the 1,103 studies initially retrieved, 14 fulfilled our eligibility criteria. Majority of studies (86 %) were case–control designs, with no randomized controlled trials. Variability existed in the surgical techniques and modalities used to measure pre- and post-operative alpha angles. All 14 studies reported a mean measured post-operative restoration of a normal alpha angle (equal to or less than 55°). Failure due to inadequate osseous correction was cited in 3/14 included studies. Correction resulted in significant improvements in range of motion and patient Visual Analog Scales, non-arthritic hip scores, Harris Hip Scores and the short-form-12.ConclusionBased on this review, there is evidence supporting that precise surgical restoration of the alpha angle in CAM-type FAI to a minimum of less than 55° will lead to improved patient outcomes. The alpha angle is a good predictor of outcome and represents a simple, reproducible and inexpensive guide that can be used intra-operatively and post-operatively. Level of evidenceTherapeutic Study, Systematic Review of studies, Level IV. More... »

PAGES

812-821

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00167-013-2678-6

DOI

http://dx.doi.org/10.1007/s00167-013-2678-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1038181824

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24057353


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