Influence of pelvic tilt on functional acetabular orientation.

Background: Pelvic tilt influences acetabular orientation (AO). Anatomical AO can be measured in relation to the anterior pelvic plane (APP), functional AO can be calculated relative to table's plane.

Objective: To assess to what extent functional AO is determined by pelvic tilt and if APP and table plane give equal information for correct AO.

Pelvic tilt compensates for increased acetabular anteversion.

Purpose: 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.

Methods: Pelvic tilt and AA of 138 individuals were measured by computed tomography (CT).