Abstract
Osteosynthesis of femoral neck fractures (FNF) is accompanied by a large percentage of various complications. The aim of this research was to study biomechanical implications arising from the stress and strain distributions by use of new device –perforated H-beam implant. A reference 3D femur model has been developed using digital femur geometry. The stress and deformity characteristics after the application of force were determined by ANSYS, which entails the finite element analysis (FEA) method. This method was used for both the perforated and non-perforated implant models and compared the application of constant strength. Three types of FNF were realized according to the Pauwell classification system.We concluded that, the perforations in the implants make the distribution of strength and pressure homogenous along the whole implant functioning as wave breaker to reduce the pressure on the bone. This contributes to implant stability and the minimization of bone destruction.
Highlights
Scientists and clinicians have long been interested in the assessment of the mechanical behavior of human whole bones
In the assessment of the performance of orthopedic implants to identify areas of high stress, and to facilitate implant design, biomechanical testing has often been augmented by the use of finite element models (FEM) of bone-implant systems
Finite element analysis of a whole bone was first performed in [1,2] to gain a perspective on the stresses encountered by the human femur (2D geometry), later models were 3D in nature [3]
Summary
Scientists and clinicians have long been interested in the assessment of the mechanical behavior of human whole bones. The general impetus has been twofold, namely to understand the various geometric and material factors that affect gross mechanical behavior under various physiological loading conditions and to determine which orthopedic repair techniques and implants can best preserve or improve intact whole bone biomechanical strength and stability. To these ends, both experimental methodological and theoretical models have been reported in the literature [1,2,3].
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