The effect of seated pelvic tilt on posterior edge-loading in total hip arthroplasty: A finite element investigation
| Autor: | Long Yang, Qing Li, Jim Pierrepont, Brad Miles, Jevan Arulampalam, Catherine Stambouzou |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Orthodontics
Pelvic tilt 030222 orthopedics business.industry Arthroplasty Replacement Hip Mechanical Engineering Finite Element Analysis Posture 0206 medical engineering 02 engineering and technology General Medicine Contact patch Sitting 020601 biomedical engineering Finite element method Sagittal plane Pelvis 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Contact mechanics medicine Head (vessel) business |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 232:241-248 |
| ISSN: | 2041-3033 0954-4119 |
| DOI: | 10.1177/0954411917752028 |
| Popis: | Edge-loading of a ceramic-on-ceramic total hip replacement can lead to reproducible squeaking and revision. A patient’s functional acetabular cup orientation, driven by their pelvic tilt, has been shown to be a significant factor in squeaking during hip flexion. The aim of this study was to investigate the effect of seated pelvic tilt on the contact mechanics at the ceramic bearing surface. A finite element model of a ceramic-on-ceramic total hip replacement was created. The cup was orientated at 40° inclination and 15° anteversion relative to the anterior pelvic plane. The stem was flexed 90° to replicate sitting in a chair. The model was loaded using data from in vivo measurements taken during a sit-to-stand activity. The pelvis was modelled in seven different sagittal positions, ranging from −30° to 30° of pelvic tilt, where a positive value denotes anterior pelvic tilt. Three different head sizes were investigated: 32, 36 and 40 mm. The maximum contact pressure and contact patch to rim distance were determined for each of the 21 simulations. Edge-loading (contact patch to rim distance |
| Databáze: | OpenAIRE |
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