Structural analysis of an intramedullary nail with cross screw
The optimal dimensions of intra-medullary nails and cross screws for a successful treatment of the fractured bone is a very important part of implant development.
| Outer diameter and cross sections of nail and screw, tolerances between the components, material and friction properties play a decisive part. Using the Finite Elemente (FE) method, ASD is able to perform strength analyses on orthopaedic implants. For example, a nail - screw - system is analysed considering the fact that the components can contact and influence each other. | ||||||
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The interaction between bone and implant is considered by modelling of bone fracture components in contact to the implant or with the use of simplified boundary conditions, e.g. the simulation of bone support on implant surface using links.
The analysis of contact forces and stresses of each component can show design flaws of the implant. Variation of parameters are calculated in a comparatively short time without high expenditure reducing time and the number of biomechanical tests during the development phase. | 
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