Please login to view this media
- Talk
- 21/09/2022
- UK
Lateral Hinge Fracture Risk Reduction in Medial Opening Wedge High Tibial Osteotomy: A Finite Element Analysis Study
Description
In this presentation, Hamza Osmani discusses a finite element analysis study related to knee osteoarthritis in 55-year-old patients, emphasizing the economic and clinical burden of the condition. He highlights the medial opening wedge high tibial osteotomy as a treatment option, along with the risks of complications, specifically lateral hinge fractures. Osmani references previous literature that discusses hinge width and its implications on fracture risks, stressing the need for optimal cut geometry to minimize these risks.
He outlines a methodical approach to the study, divided into two parts: the first involved a single CT scan to create intraoperative models that assessed stress concentrations with various osteotomy angles and saw profiles; the second explored tibias from different patients to understand the scaling of osteotomy apex locations relative to bone size.
Key findings include the relationship between hinge width and intra-articular fractures, with 40mm being a significant threshold. Additionally, the study determined that narrower hinges could achieve greater correction angles but also presented stability challenges, as assessed by micro-motion metrics of 100 microns.
The presentation presents conclusive evidence regarding optimal apex location for osteotomy to reduce strain on the hinge, showing that this can be correlated across different tibia sizes. Osmani emphasizes the importance of understanding osteotomy mechanics for better patient outcomes, acknowledges the study's limitations, and calls for further research on bone properties.