Rashid Tikhilov1, Igor Shubnyakov1, Scott Burns2, Nikolay Shabrov3, Alexey Kuzin3, Andrey Mazurenko4, Alexey Denisov5. 1. Vreden Russian Research Institute of Traumatology and Orthopaedics, St. Petersburg, Russia. 2. Department of Physical Therapy, Temple University, Philadelphia, PA, USA. 3. Institute Of Metallurgy, Mechanical Engineering and Transport, Saint Petersburg State Polytechnic University, St. Petersburg, Russia. 4. Federal Centre of Traumatology, Orthopaedics and Arthroplasty, Cheboksary, Russia. 5. Vreden Russian Research Institute of Traumatology and Orthopaedics, St. Petersburg, Russia. med-03@yandex.ru.
Abstract
PURPOSE: The purpose of this study was stimation of optimal percentage of lateral uncoverage of the acetabular component during total hip arthroplasty for patients with severe developmental hip dysplasia. METHODS: Mathematical computer modeling based on the finite element technique and the mechanical experiment were performed. Critical values of uncoverage enabling safe primary fixation of acetabular component were estimated in designed models. RESULTS: Using the finite element technique and the mechanical experiment on pelvis models, a possibility of mounting an acetabular component with moderate uncoverage within 25% without screws and with significant uncoverage to 35% with an additional two-screw fixation was demonstrated. CONCLUSIONS: This study provides additional guidance on optimal acetabular uncoverage assessment and fixation methods of surgeons performing THA on patients with DDH.
PURPOSE: The purpose of this study was stimation of optimal percentage of lateral uncoverage of the acetabular component during total hip arthroplasty for patients with severe developmental hip dysplasia. METHODS: Mathematical computer modeling based on the finite element technique and the mechanical experiment were performed. Critical values of uncoverage enabling safe primary fixation of acetabular component were estimated in designed models. RESULTS: Using the finite element technique and the mechanical experiment on pelvis models, a possibility of mounting an acetabular component with moderate uncoverage within 25% without screws and with significant uncoverage to 35% with an additional two-screw fixation was demonstrated. CONCLUSIONS: This study provides additional guidance on optimal acetabular uncoverage assessment and fixation methods of surgeons performing THA on patients with DDH.
Entities:
Keywords:
Dysplasia; Total hip replacement; Uncoverage of acetabular component
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