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- Talk
- 07/09/2020
- UK
The Effect of Anterior Inferior Iliac Spine Anatomy on the Range of Motion to Impingement in Total Hip Replacement
Description
In this presentation by Simon Williams from the University of Leeds, a study titled "The effect of anterior inferior iliac spine anatomy on the range of motion to impingement in total hip replacement" is discussed. Williams outlines the significance of dislocation as a leading cause of failure in hip replacements and highlights the impact of bone impingement, particularly between the anterior side of the femur and the anterior inferior iliac spine (AIIS) during high flexion.
The study investigates the relationship between the anatomical positioning of the AIIS and the range of motion before impingement occurs. A cohort of 25 CT scans was analyzed, from which 9 were selected and 3D models created in Solidworks. The models were standardized to eliminate bias from the implant design and tested for motion dynamics.
Findings indicate that while the anterior and superior measures of the AIIS did not correlate significantly with the range of motion, the lateral measure of the AIIS was found to inversely affect the range of motion—indicating a loss of 1.2 degrees of range of motion for every millimeter increase in the lateral position of the AIIS peak.
Williams emphasizes the need for further data to reinforce these findings and suggests future research to include soft tissue considerations, highlighting the potential interactions between bone and surrounding structures in clinical settings.