Effect of Pelvic Tilt and Rotation on Cup Orientation in Both Supine and Standing Positions
| Autor: | Guoyan Zheng, William Murphy, Hohyun Yun, Stephen B. Murphy, Daniel M Ward, Brett L. Hayden |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Cup orientation Pelvic tilt Supine position Rotation Arthroplasty Replacement Hip Radiography Pelvis 030218 nuclear medicine & medical imaging Standing Positions 03 medical and health sciences 0302 clinical medicine Orientation (geometry) Image Processing Computer-Assisted Supine Position Humans Medicine Orthopedics and Sports Medicine Postoperative Period Aged Aged 80 and over Orthodontics 030222 orthopedics business.industry Acetabulum Middle Aged body regions Standing Position Female Hip Prosthesis Tomography X-Ray Computed business Pelvic rotation |
| Zdroj: | The Journal of Arthroplasty. 33:1442-1448 |
| ISSN: | 0883-5403 |
| Popis: | The purpose of this study is to analyze the effect of pelvic tilt and rotation on radiographic measurement of cup orientation.A total of 68 patients (79 hips) were included in this study. The patients had a computed tomography study and approximately 3 months of postoperative standing anteroposterior pelvic radiographs in both supine and standing positions. We used 2-dimensional (2D)/3-dimensional (3D) matching to measure pelvic tilt and rotation, and cup orientation.There was a wide range of pelvic tilt between individuals in both supine and standing positions. Supine pelvic tilt was different from standing pelvic tilt (P.05). There were differences in cup anteversion before and after 2D/3D matching in both supine and standing positions (P.05). Supine and standing pelvic tilt correlated with differences in cup anteversion before and after 2D/3D matching. When all 79 hips were separated into right and left side, pelvic rotation inversely correlated with the pelvic tilt-adjusted difference in anteversion before and after 2D/3D matching of the right side but directly correlated with that of the left side in both supine and standing positions.This study demonstrated that the measurement of cup anteversion on anteroposterior radiographs is significantly affected by both pelvic tilt and pelvic rotation (depending on the side). Improved understanding of pelvic orientation and improved ability to measure pelvic orientation may eventually allow for desired cup positioning to potentially protect against complications associated with malposition of the cup. |
| Databáze: | OpenAIRE |
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