Development of Femoral Head Interior Supporting Device and 3D Finite Element Analysis of its Application in the Treatment of Femoral Head Avascular Necrosis

Abstract

BackgroundThe aim of this study was to develop and perform the 3D finite element analysis of a femoral head interior supporting device (FHISD).Material/MethodsThe 3D finite element model was developed to analyze the surface load of femoral head and analyze the stress and strain of the femoral neck, using the normal femoral neck, decompressed bone graft, and FHISD-implanted bone graft models.ResultsThe stress in the normal model concentrated around the femoral calcar, with displacement of 0.3556±0.1294 mm. In the decompressed bone graft model, the stress concentrated on the femur calcar and top and lateral sides of femoral head, with the displacement larger than the normal (0.4163±0.1310 mm). In the FHISD-implanted bone graft model, the stress concentrated on the segment below the lesser trochanter superior to the femur, with smaller displacement than the normal (0.1856±0.0118 mm).ConclusionsFHISD could effectively maintain the biomechanical properties of the femoral neck.

Significance of Lateral Pillar in Osteonecrosis of Femoral Head

“…In Figure 1c , the principal stress distribution from the top of the femoral head to calcar was illustrated in healthy hip joint model; such simulation results were found consistent with the results of previous studies. [ 19 21 ] In addition, the shape and location of the biomechanical transfer path were consistent with the distribution of bone density [ Figure 1d ]. Thus, we hypothesized that the FE results could reflect the physical status of the hip and could be used to analyze the effects of the early osteonecrosis that occur in different pillars of the femoral head.…”