In this article we are analyzing how the different design of the LIVTrauma compression hole results in an improvement over other designs in implant tension resistance.
Using a FEA (finite element analysis), a mathematical tool, used by engineers to simulate real life situations, we can present and compare our results. This tool has been used in the design of orthopedic implants and surgical techniques, especially in trauma surgery where the forces that the bones are subjected to are greater.
In our study we analyze the results of a bending test of a section of two plates with 3,2mm thickness and exact same geometry excluding the screw holes. Bending tests of 1 and 6mm displacement are made.
1 mm displacement (Astrolabe’s Design first, then Other’s Design) Units in MPa
6 mm displacement (Astrolabe’s Design first, then Other’s Design) Units in MPa
In the case of the 1mm bending test, Astrolabe’s product endures the deformation having only one stress concentration region, due to the smooth design of the plate holes. The same is not observed for the other design, given that the harsh lines describing the plate holes lead to two separate stress concentration regions. On the 6 mm bending test, observed results denote that the regions of maximum stress concentration are greater for the case of the other design than the ones observed in LIV trauma’s product, indicating that the design provided by Astrolabe presents a plate with a smoother design, leading to a reduction of the regions with high stress concentration.
FEA is an important step in any engineering problem. It certainly has a role in the development, improvement and refinement of orthopedic implants.
