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. 2018 Jan;52(1):49-53.
doi: 10.1016/j.aott.2017.10.001. Epub 2017 Nov 20.

Prevalence of asymptomatic femoroacetabular impingement in Turkey; cross sectional study

Gökhan Polat  1 , Koray Şahin  2 , Ufuk Arzu  1 , Alper Şükrü Kendirci  1 , Mehmet Aşık  1
Affiliations

Prevalence of asymptomatic femoroacetabular impingement in Turkey; cross sectional study

Gökhan Polat et al. Acta Orthop Traumatol Turc. 2018 Jan.

Abstract

Objectives: Femoroacetabular impingement (FAI) is one of the causes of hip pain in young-adult patients. The purpose of our study is to determine the prevalence of radiological FAI findings in asymptomatic population in Turkey.

Methods: Trauma patients aged 18-65 years who applied to the emergency service between September 2015 and September 2016 were retrospectively evaluated for this study. After a preliminary study and power analysis, 2152 hips of the 1076 previously asymptomatic patients were evaluated radiologically with pelvis antero-posterior and frog-leg radiographs. On radiographs of these patients; alpha angle, lateral central edge angle (LCEA), Tönnis angle (TA) and collodiaphyseal angle were measured. Alpha angle values higher than 55° were noted as cam type FAI. TA values lower than 0° or LCEA values higher than 39° were noted as pincer type FAI. LCEA values lower than 25° or TA values higher than 10° were noted as acetabular dysplasia.

Results: Mean age of 1076 patients (602 female, 474 male) was 42.1 ± 15.6 years. The assessment showed that 15.9% of the patients had cam type, 10.6% had pincer type, 3.1% had combined type FAI and 9.3% had findings of acetabular dysplasia. The prevalence of asymptomatic FAI is significantly more in males (46%) in comparison to females (17%) in Turkey.

Conclusion: Even though FAI is considered to be a pathology associated with hip osteoarthritis; it is very common in asymptomatic population. In this respect, our study showed that prevalence of radiological FAI findings in asymptomatic adult population was 29.6% in Turkey.

Keywords: CAM; Femoroacetabular impingement; Hip; Osteoarthritis; Pincher; Prevalance; Turkey.

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Figures

Fig. 1
Fig. 1
Algorithm of the study.
Fig. 2
Fig. 2
Graphs of the results showing the percentage of FAI and acetabular dysplasia in the population.
See this image and copyright information in PMC

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