Three - Dimensional Finite Element Analysis Of The Internal Fixation Of The Medial Lumen Of The Neck Fracture Of The Humerus Surgery

ObjectiveTo compare and evaluate the fixing effects of two different internalfixation modes (LPHP and T-shaped Plate)for surgical neck fractures ofhumerus between types integrity of humerus medial cortex and collapsesby using three-dimensional finite element method, to provide theoreticalmechanics basis for choosing the internal fixation in clinic.MethodsEstablished the ideal finite element models of two kinds of surgicalneck fractures of humerus as well as the finite element models of twodifferent internal fixation methods, to simulated a situation that thehumerus was suffered from indirect violence when felling down, andloaded the models with a appropriate pressure of an assumed overallweight of65Kg, and carried out the finite element calculations. Byanalyzing the proximal humerus displacement, internal fixationsdisplacement, fixing components stress and proximal humerus stress,compare the fixing effects of two internal fixation modes for two types offracture, and consider the shoulder joint activity postoperative at the sametime.ResultsIn the two types of fracture, the fixing effects of LPHP was better than T-shaped Plate, especially in collapse-type of fracture.ConclusionThe analysis of modes with three-dimensional finite elementfor humerus surgical neck fractures of type integrity of humerus medialcortex and collapses were established basically.Both of two internalfixation modes may be used for humerus surgical neck fractures of typeintegrity of humerus medial cortex and collapses, the fixing effects ofLPHP was better than T-shaped Plate.