Biomechanical Aspects Investigation for Radius Fracture in Multi-Parameters Condictions and Internal Fixator Optimization by Using Taguchi Method, Fea and in Vitro Experiment.

The most popular treatment method for unstable distal radius fractures is internal fixation using a metal plate and screw. This approach is effective in restoring the anatomical alignment of the wrist and providing powerful fixation strength. However, the internal fixation mechanisms become complicated when a complex fracture or osteoporosis occurs. Accordingly, the stress concentrated on the internal fixator can result in causing a break in the bone, or overloading on bone causing the implant to loosen. Furthermore, unsuitable treatment, complicated wrist loading and unsuitable internal fixator are also main factors in fixated strength. The multiple mechanical interaction factors influence distal radius fracture treatment. Therefore, the aim of this study will use reverse engineering CAD and CAE techniques to simulate multi-parameter finite element (FE) models of the fixated radius, i.e. fracture types, fixation methods, osteoporosis levels and load conditions. The Taguchi statistical method will to reduce each design factor on the internal fixator. The Taguchi optimization method then use again to understand the optimize design of internal fixator. The sawbone and Linear Variable Differential Transformer (LVDT) will using to understand the fixated strength of each factor on distal radius fixation. This study has been arranged for three-years, and the specific aims are as follows: First year: (1) Solid model constructions of radius fracture using RE and CAD. (2) Global FE analysis. (3) Pilot experiment constructing. Second year: (1) Internal fixator parameters reduction using statistics-Taguchi method. (2) Reduced model constructions by using CAD. (3)Finite element analysis. (4) Taguchi optimal analysis. (5) Pilot experiment constructing Third year: (1)Different fracture types and fixations manufacturing (2) Internal fixator manufactured by CAM. (3)Fixated strength experiment testing. (4)Statistical analysis .

Project ID:PB9907-10776
External Project ID:NSC99-2221-E182-054