Influence of pelvic tilt on functional acetabular orientation
| Autor: | Carsten Perka, Stefan Zachow, Heiko Ramm, Robert K. Zahn, Stephan Tohtz, Matthias Pumberger, Sarah Grotjohann, Michael Putzier |
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| Rok vydání: | 2016 |
| Předmět: |
Pelvic tilt
Adult Male Adolescent Arthroplasty Replacement Hip Biomedical Engineering Biophysics Health Informatics Bioengineering Computed tomography Biomaterials 03 medical and health sciences Young Adult 0302 clinical medicine Imaging Three-Dimensional Orientation (geometry) medicine Humans 030212 general & internal medicine Pelvic Bones Pelvis Aged 030222 orthopedics medicine.diagnostic_test business.industry Sagittal balance Acetabulum Anterior pelvic plane Middle Aged medicine.anatomical_structure Functional anatomy Female Nuclear medicine business Tomography X-Ray Computed Information Systems |
| Zdroj: | Technology and health care : official journal of the European Society for Engineering and Medicine. 25(3) |
| ISSN: | 1878-7401 |
| Popis: | 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. METHODS AO was evaluated by computed tomography (CT) scans of 138 patients. Pelvic tilt, anatomical and functional AO were measured, differences between the two reference planes were calculated. RESULTS Anatomical and functional acetabular anteversion (AA) were found to be different in 21% of individuals with an enhanced extent of pelvic tilt. Functional AA was increased compared to anatomical AA at high posterior pelvic tilt (p < 0.001). Enlarged anterior tilting of the pelvis reduced APP-related AA (p < 0.002). Anatomical AA positively correlated with pelvic tilt, particularly in females (p < 0.01, correlation coefficient = 0.698, R2 = 0.523). CONCLUSIONS APP and table plane do not provide equal information about AO at enhanced pelvic tilt. Functional orientation of the acetabulum is dependent on pelvic tilt, which itself is influenced by anatomical AA and should therefore be analyzed for precise AO. |
| Databáze: | OpenAIRE |
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