Pressure distribution on articular surfaces: Application to joint stability evaluation

Implementation of Discrete Element Analysis for Subject-Specific, Population-Wide Investigations of Habitual Contact Stress Exposure

“…Model construction is from the bone surfaces, primarily, with cartilage surfaces providing the distribution of cartilage thickness to be used in modeling, when available. In cases where loads are applied, the DEA methods directly follow those previously published (An et al, 1990;Genda et al, 2001;Iwasaki et al, 1998).…”

“…Advancement of expeditious methods for determining in vivo articular contact stress distributions will enhance the understanding of normal articular function, and of the mechano-pathology of OA. Chao and colleagues popularized the use of rigid body spring modeling (now commonly known as discrete element analysis, or DEA) in biomechanics, as a simple numerical framework to model articular contact (An et al, 1990;Genda et al, 2001;Iwasaki et al, 1998;Li et al, 1994;Volokh et al, 2007). The DEA formulation involves treating bones as rigid bodies, and the cartilage at a given joint as an array of compressive-only springs distributed over the articulating bone surfaces.…”

“…Model construction is from the bone surfaces, primarily, with cartilage surfaces providing the distribution of cartilage thickness to be used in modeling, when available. In cases where loads are applied, the DEA methods directly follow those previously published (An et al, 1990;Genda et al, 2001;Iwasaki et al, 1998).When displacements are instead applied to the model, modifications to the DEA methods are required (Bei & Fregly, 2004). First, the bone surfaces are placed in the loaded pose, and closest-point pairings are made between the articulating regions.…”

Current Concepts Review

“…The consequences of lengthening, shortening, axial deviation and orientation of radial head implants on the radiocapitellar joint and on the elbow biomechanics are unknown, although these alterations could cause a change in articular contact surface and induce peak stresses on the cartilage, resulting in degenerative disorders (5,68). Therefore, further basic biomechanical research is necessary to determine the consequences of such alterations and to define which of those can be accepted in order to make new designs and adjust the existing instrumention to implant a radial head prosthesis correctly.…”

Biomechanics of the Elbow

“…. 이후 많은 저자들에 의 해 실험 결과가 발표되었는데 척-상완 관절로의 힘의 전달은 9~40%로 요-상완관절에 비해 적은 것으로 보 고되었다 3) . Markolf 등은 주관절의 위치, 특히 외반-내반에 따라 힘의 전달이 크게 달라지며 요-척골의 길 이에 따라서도 변화한다고 발표하였다 16) .…”