Relationship between sacral pelvic incidence and acetabular orientation
Relationship between sacral pelvic incidence and acetabular orientation
Hip Int 2011; 21(1): 87 - 97
Article Type: ORIGINAL ARTICLE
DOI:10.5301/HIP.2011.6283
Authors
Jean Legaye, Ginette Duval-Beaupere, Andre Barrau, Christophe Boulay, Jerome Hecquet, Jean-Pierre Montigny, Christine Tardieu
Abstract
The importance of the sacral pelvic incidence (SPI) in relation to individual variations of sagittal spinal curvature has become well-recognised. We attempted to determine the relationship between SPI and acetabular orientation. The three-dimensional coordinates of 47 homologous points were observed on 51 adult anatomical pelvises (26 female and 25 male). The reference vertical plane was Lewinnek’s anterior pelvic plane. 10 angular parameters and 11 linear parameters were defined and calculated. These were expressed both in absolute value (in millimetres) and in “acetabular unit” (relative to the mean value of the right and left acetabular rays). Mean values of the parameters were calculated for all pelvises and according to gender. There were two dominant parameters: the “sacral slope” and the “V pubic angle”. “Acetabular tilting” was primarily dependant on the “sacral slope” and its intermediary on the “SPI”, while “acetabular anteversion” dependent on the “V pubic angle” via the “angle of prow”. It is recommended that positioning of the acetabular cup in total hip arthroplasty relates to anatomical parameters, and to the global sagittal balance of the pelvi-spinal unit.
Article History
- • Accepted on 10/25/2010
- • Available online on 1/27/2011
- • Published in print on 2/15/2011
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Authors
- Legaye, Jean
[PubMed]
[Google Scholar]
Unity INSERM 215, Spinal Bio-mechanic, Garches - France and Department of Orthopaedic Surgery, University Hospital UCL Mont-Godinne, Yvoir- Belgium
- Duval-Beaupere, Ginette
[PubMed]
[Google Scholar]
Unity INSERM 215, Spinal Bio-mechanic, Garches - France
- Barrau, Andre
[PubMed]
[Google Scholar]
Laboratory of Adaptations and Evolution of the Osteo-articular Systems, Museum of Natural History, Paris - France
- Boulay, Christophe
[PubMed]
[Google Scholar]
Department of Physical Medicine and Revalidation, Hospital La Timone, Marseille - France
- Hecquet, Jerome
[PubMed]
[Google Scholar]
Unity INSERM 215, Spinal Bio-mechanic, Garches - France
- Montigny, Jean-Pierre
[PubMed]
[Google Scholar]
Department of Physical Medicine and Functional Revalidation, Hospital Foch, Suresnes - France
- Tardieu, Christine
[PubMed]
[Google Scholar]
Laboratory of Adaptations and Evolution of the Osteo-articular Systems, Museum of Natural History, Paris - France