Biomechanical supporting effect of tantalum rods for the femoral head with various sized lesions: a finite-element analysis.

Background: Features of necrotic lesions and various interventions could affect the biomechanics of the femoral head. A three-dimensional finite-element analysis was designed to demonstrate necrotic femoral head stress changes with various sizes of necrotic lesions, and evaluate the effect of tantalum rods on preventing femoral head cracking.

Methods: Femoral computed tomography scans were used to build a normal three-dimensional finite-element femoral head model in a computer.

[Three-dimensional finite element analyses of bone surface stress of two kinds of conjunction implant].

Objective: To establish a three-dimension finite element model of mandible with two kinds of dental implant and to study the stress of implant-bone interface.

Methods: Measuring the data of the components of the dental implant and using spiral CT image reconstruction technique to scan the cross section of the mandible. Three-dimension finite element analysis software Unigraphics and MSC.