A revised approach of human mastication function rehabilitation through monotypical mastication analysis.

Objective: The aim of the simulation was to find the forcing laws, which provide the close-to reality mastication motions of the components of the system and to investigate the contact zones, interaction forces and their action points as they vary in time. The loss of one or few elements of the mastication system can be restored without significant violations of the overall function provided the general correlations among the mastication system elements, which were influenced during the evolutionary development, have been determined in advance.

Materials And Methods: We present an approach based on the computer simulation of mastication biomechanics on the basis of finite element (FE) models.

Finite element modeling of cooled-tip probe radiofrequency ablation processes in liver tissue.

Finite element model of radiofrequency ablation (RFA) with cooled-tip probe in liver has been developed by employing COMSOL Multiphysics software. It describes coupled electric, thermal and sodium chloride solution infiltration flow phenomena taking place during ablation processes. Features of hydraulic capacity, saturation of the tissue by infiltration, and dependency of electrical conductivity on the damage integral of the tissue have been supplied to the model.

Finite element analysis of stresses in the maxillary and mandibular dental arches and TMJ articular discs during clenching into maximum intercuspation, anterior and unilateral posterior occlusion.

The objective of this study was to investigate distribution of stresses in the human TMJ discs, generated during clenching into various occlusal positions. The work presents a biomechanical finite element model of interaction of mandibular and maxillary dental arches and the TMJ discs of a particular person, based on real geometrical data obtained from spiral computed tomography two-dimensional images. 3D contour coordinates - point clouds were collected from these images and solid model was created.

Finite element modeling and experimental investigation of infiltration of sodium chloride solution into nonviable liver tissue.

Unlabelled: The aim of this study was to establish a mathematical model of the infiltration of sodium chloride solution into cadaveric liver tissue.

Methods: The time law of the flow of the infiltrated fluid at every node of the finite element model was obtained in terms of Darcy's velocity, pressure, and volumetric saturation fraction. The model equations interpret the liver tissue as a porous medium taking into account the hydraulic conductivity, capacity, and absorption mechanisms.

Investigation of radiofrequency ablation process in liver tissue by finite element modeling and experiment.

Background: The character of ablation processes with high-frequency electrical current is similar in most biological tissues; however, quantitative characteristics are very different. Consequently, mathematical models of the process have a lot of specific aspects. In this study, we developed mathematical model of radiofrequency ablation in liver tissues with experimental validation of model in ex vivo porcine liver.