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Closed-form analytical formulas for a tooth of paraboloidal shape under the orthodontic force are presented. These formulas are based on both the approximation of strains according to the displacement of the tooth and the tooth equilibrium of the thin surrounding periodontal membrane. The proposed formulas are capable of determining the most important quantities involved the distribution of strain...
Manipulation of stem cells is one of the highest goals within biological sciences for the development of devices for the regeneration of injured tissues. In general, the mechanical properties of cells are nowadays recognized to play a role in many cellular phenotypes, including mobility though tissues, survival to mechanical loading and differentiation. Here we present a study where the mechanics...
The purpose of this research was to study the contact between adjacent teeth and the biomechanical reactions of the teeth root, mandible, and periodontal membrane under orthodontic forces. First, the mandible and mandibular dentition were scanned by spiral computed tomography, and then reconstructed. The contact problem of the three dimensional multi-body between arc wire orthodontic device and mandible...
Deformation of a red blood cell (RBC) in a high-shear flow was investigated. The RBC was modeled as a closed shell membrane consisting of spring networks in the framework of the energy minimum concept. The simulation of RBC in a parallel shear flow showed deformation parameters of RBC were well agreed with experimental results. The simulation of RBC behavior in various flow fields demonstrated that...
Measurement of interface pressure between the foot and shoe underpins a number of important applications in gait analysis. Abnormal pressure may indicate instability in gait, risks of ulceration development especially in diabetic foot as well as many other biomedical diagnostic applications. Since the currently available foot pressure sensors exhibit many limitations while the opportunity offered...
The measurement of interface pressure between the foot and shoe is important in gait analysis and other health diagnosis. Abnormal pressure may indicate instability in gait, risks of ulceration development especially in diabetic foot as well as have many other biomedical diagnostic applications. However, the currently available foot pressure sensors show a number of weaknesses that limit their performance...
A multiaxial testing rig has been designed to investigate mechanical properties of soft tissue membranes. This approach has the advantage over biaxial loading in that it can be used to investigate soft tissue membranes with complex structural architecture. A finite element model of tissue mechanics has been used to analyze the experimental data in order to evaluate the stress-strain relationship,...
The geometrical and compliance mismatch between host artery and synthetic vascular substitute creates an increase of pulse wave reflection and energy losses as well as a stress concentration at the anastomosis. It may cause structural fatigue of the arterial wall leading to eventual rupture. A method is proposed for the theoretical computation of stresses at the arterial/graft junction. The theory...
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