![]() ![]() We conclude the use of ray-casting with hierarchical OBB for collision detection is a viable method for simulating joint contact mechanics in human movement.Ĭartilage contact pressure collision detection elastic foundation joint contact. Simulated tibiofemoral contact locations were comparable to prior experimental measurements, while pressure magnitudes were similar to those predicted by finite element models. A similar approach to the processing of results has never been published. Read more related scholarly scientific articles and abstracts. However, pressure magnitudes converged at considerably lower mesh densities (2.6 triangles/mm 2) where CPU and GPU implementations of collision detection exhibited equivalent performance. The aim of this study is to carry out the visualization of cartilage contact by fluorescence microscopy simultaneously with the friction measurement and to explain the new methodology for the description of lubrication film in the model of the synovial joint. Histochemical visualization of the cartilage hyaladherins using a biotinylated hyaluronan oligosaccharide bioaffinity probe. Objective: This study aims to characterize the deformations in articular cartilage under compressive loading and link these to changes in the extracellular matrix constituents described by magnetic resonance imaging (MRI) relaxation times in an experimental model mimicking in vivo cartilage-on-cartilage contact. Collision detection implemented in parallel on a GPU provided up to a 10× speed increase when using high resolution mesh densities that had >10 triangles/mm 2. ![]() Following these successful proof-of-concept results in rat cartilage, we expect that an upgrade of the system to higher resolutions. Marenzana M(1), Hagen CK, Das Neves Borges P, Endrizzi M, Szafraniec MB, Ignatyev K, Olivo A. Local cartilage contact pressure was then computed using an elastic foundation model. Visualization of small lesions in rat cartilage by means of laboratory-based x-ray phase contrast imaging. At each time step of a simulation, ray-casting was used in conjunction with hierarchical oriented bounding boxes (OBB) to rapidly identify regions of overlap between articulating cartilage surfaces. Knee mechanics were then predicted within the context of a dynamic gait simulation. Abnormal contact stresses are thought to be a primary cause of hip osteoarthritis (OA). Both the femoral and tibial components are treated this way. Keywords: hip finite element biomechanics cartilage contact stresses cartilage pressure Contact stresses in the human hip play an important role in maintaining joint health and pain-free ambula-tion. We created a knee model that included articular cartilage contact for the tibiofemoral and patellofemoral joints. The cartilage is modeled as neo-hookean with a density of 1100kg/m3, 3.3MPa stiffness, and 0.4 poissons. The objective of this study was to assess the use of an advanced collision detection algorithm to simulate cartilage contact pressure patterns within dynamic musculoskeletal simulations of movement. ![]()
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