Pelvic tilt compensates for increased acetabular anteversion

International Orthopaedics
Robert K ZahnStephan Tohtz

Abstract

Pelvic tilt determines functional orientation of the acetabulum. In this study, we investigated the interaction of pelvic tilt and functional acetabular anteversion (AA) in supine position. Pelvic tilt and AA of 138 individuals were measured by computed tomography (CT). AA was calculated in relation to the anterior pelvic plane (APP) and relative to the table plane. We analysed these parameters for gender-specific and age-related differences. The mean pelvic tilt was -0.1 ± 5.5°. Pelvic sagittal rotation displayed no gender nor age related differences. Females showed higher angles of AA compared with males (20.0° vs 17.2°, p < 0.001; AA relative to the APP). Anterior tilting of the pelvis positively correlated with AA and individuals with high AA had a higher anterior pelvic tilt compared with those with low AA (p < 0.0001; AA relative to the APP). AA has to be calculated regarding pelvic sagittal rotation for correct acetabular orientation. Pelvic tilt is dependent on acetabular orientation and compensates for increased AA.

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Citations

Sep 12, 2018·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Angelica S AugustineFrederic Picard
Oct 23, 2018·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Georg HettichThomas M Grupp
Aug 8, 2019·Clinical Orthopaedics and Related Research·Tetsuya TachibanaYasuharu Nakashima
Dec 3, 2016·Technology and Health Care : Official Journal of the European Society for Engineering and Medicine·Robert K ZahnStephan Tohtz
Apr 1, 2021·Clinical Orthopaedics and Related Research·Kenji KitamuraYasuharu Nakashima

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