International Orthopaedics

, Volume 40, Issue 8, pp 1571–1575 | Cite as

Pelvic tilt compensates for increased acetabular anteversion

  • Robert K. Zahn
  • Sarah Grotjohann
  • Heiko Ramm
  • Stefan Zachow
  • Michael Putzier
  • Carsten Perka
  • Stephan Tohtz
Original Paper

Abstract

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). 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.

Results

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).

Conclusions

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.

Keywords

Pelvic tilt Acetabular orientation Acetabular anteversion Spino-pelvic balance 

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Copyright information

© SICOT aisbl 2015

Authors and Affiliations

  • Robert K. Zahn
    • 1
  • Sarah Grotjohann
    • 1
  • Heiko Ramm
    • 2
  • Stefan Zachow
    • 2
  • Michael Putzier
    • 1
  • Carsten Perka
    • 1
  • Stephan Tohtz
    • 3
  1. 1.Centre for Musculoskeletal Surgery, Department for Orthopaedics, Department for TraumatologyCharité-University Medicine BerlinBerlinGermany
  2. 2.Visualization & Data Analysis Medical Planning & Computational Medicine GroupsZuse Institute Berlin (ZIB)BerlinGermany
  3. 3.Department for Orthopaedics and TraumatologyHELIOS Klinikum Emil von Behring, Oskar-Helene-HeimBerlinGermany

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