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ID 47011
file
creator
Tanitame, Keizo
Mitani, Hidenori
subject
Femoroacetabular impingement
Alpha angle
Acetabular depth
MDCT
NDC
Medical sciences
abstract
Purpose: To determine the prevalence of femoroacetabular impingement (FAI) morphology in asymptomatic Japanese young adults using multi-detector computed tomography (MDCT) scan.
Materials and Methods: A total of 170 subjects (85 men; age, 19–39 years) without hip-related problems were included. Radial slices of 2-mm thickness at 30° intervals were reconstructed perpendicular to the central axis of the femoral head and neck for both hips. Alpha (α) angles, acetabular (AC) depths, and lateral centre-edge (LCE) angles were measured; maximum value of measured α angles was defined as max α angle, and minimum value of measured AC depths was defined as min AC depth. Max α angle > 55° was considered positive for cam-type FAI feature and min AC depth < 0 mm or LCE angle > 40° was considered positive for pincer-type FAI feature. Differences among planes, right-left correlations, and sex differences in FAI abnormalities were assessed.
Results: The α angles at 1- and 2-o’clock positions in men and at 2-o’clock position in women were significantly greater than those at other positions. AC depths at 2-o’clock position were smallest in men and women. Max α angles and min AC depths and LCE angles showed strong right-left correlations. Max α angles and the numbers of hips with cam features were significantly higher in men than in women. The prevalence of pincer features was similar between men and women.
Conclusion: The prevalence of cam type deformity is higher in men. Our results in Japanese populations were similar to those reported previously for Caucasians.
journal title
Hiroshima Journal of Medical Sciences
volume
Volume 67
issue
Issue 4
start page
97
end page
103
date of issued
2018-12
publisher
Hiroshima University Medical Press
issn
0018-2052
2433-7668
ncid
publisher doi
language
eng
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2018 Hiroshima University Medical Press
relation url
department
Graduate School of Biomedical & Health Sciences
University Medical Hospital
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