We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Side-to-side variability in the femoral neck anteversion angle: A study of the Japanese population with osteonecrosis of the femoral head.
- Authors
Suzuki, Masahiro; Kinoshita, Koichi; Sakamoto, Tetsuya; Seo, Hajime; Doi, Kenichiro; Yoshimura, Ichiro; Yamamoto, Takuaki
- Abstract
Side-to-side variability in the femoral neck anteversion angle (FA) reportedly varies from 0.0° to 17.3°. To investigate the side-to-side variability in the FA and the relationship between the FA and the morphology of the acetabulum in the Japanese population, we performed a three-dimensional computed tomography (CT)-based study involving patients with osteonecrosis of the femoral head (ONFH). CT data were obtained from 170 nondysplastic hips of 85 patients with ONFH. The FA and acetabular coverage parameters, including the acetabular anteversion angle, acetabular inclination angle, and acetabular sector angle in the anterior, superior, and posterior directions, were measured using three-dimensional CT. The distribution of the side-to-side variability in the FA was evaluated separately for each of the five degrees. The mean side-to-side variability in the FA was 6.7° ± 5.3° (range, 0.2°–26.2°). The distribution of the side-to-side variability in the FA was 0.0°–5.0° in 41 patients (48.2%), 5.1°–10.0° in 25 patients (29.4%), 10.1°–15.0° in 13 patients (15.3%), 15.1°–20.0° in 4 patients (4.7%), and >20.1° in 2 patients (2.4%). There was a weak negative correlation between the FA and anterior acetabular sector angle (r = −0.282, P < 0.001) and a very weak positive correlation between the FA and acetabular anteversion angle (r = 0.181, P < 0.018). The mean side-to-side variability in the FA was 6.7° ± 5.3° (range, 0.2°–26.2°) in Japanese nondysplastic hips, and about 20% of the patients had a side-to-side variability of >10°.
- Subjects
FEMUR head; FEMUR neck; JAPANESE people; OSTEONECROSIS; ANGLES
- Publication
Journal of Orthopaedic Science, 2024, Vol 29, Issue 2, p589
- ISSN
0949-2658
- Publication type
Article
- DOI
10.1016/j.jos.2023.02.014