Abstract
The aim of the finite element analysis (FEA) is to determine the stress and deformation state of all elements of four mechanical assemblies under certain loading and fastening conditions of the structure. The structure of the finite element analysis consists of GIC and 4 geometric variables (no bone loss, 1 surface radial loss, 2 surfaces and circumferential loss). Geometric reconstruction of simulated elements is done based on the X-ray scan images. The DICOM image collection is imported into Mimics 10.01, where two color layers are applied, which are then transformed into volumes. Surface integrity was accomplished using Geomagic Studio 2013 software. Subsequent to the reconstruction, classical geometric modeling was carried out using the SolidWorks 2013 CAD environment. Four geometric models were made and the assembly described above was inserted. Finite element analysis was performed with the Ansys 13 software. For resin composite restorations, in the case of circumferentilly bone loss, the restoration pressure drops due to increased tooth elastic deformation possibilities. In case of bone loss on one face and two sides of the tooth, there is a strong pressure on the cementum-bone interface, due to the bending effect that occurs. Pressures in dental root restorations are higher in the case of reconstruction using resin composite.
Highlights
The aim of the finite element analysis (FEA) is to determine the stress and deformation state of all elements of four mechanical assemblies under certain loading and fastening conditions of the structure
The DICOM image collection was imported into Mimics 10.01, where two color layers were applied
Classic geometric modeling Subsequent to the reconstruction, classical geometric modeling was carried out using the SolidWorks 2013 CAD environment
Summary
In order to achieve a numerical simulation, it is necessary to construct a 2D or 3D geometric model on which a series of contouring conditions can be established. Due to the large number of artifacts present on any X-ray scanning, the quality of the resulting volume is very low It contains a very large series of surfaces of the following types: spike, self-intersecting, discontinuous, surfaces that make it impossible to place the contour conditions correctly After filling up all the discontinuous zones, a re-discrete of the entire canine side surface was made to obtain a smoother volume Each of these operations is done with loss of shape and dimensions. Boolean operations were performed at this stage, separating the geometric model obtained by reconstruction into 4 conjugated solid volumes, each of which had an anatomical structure:. The aesthetic restoration element was geometrically performed as a conjugated form of the root decay profile In this way, it was possible to establish the coincidence relationship between the dentine alveolus, respectively the cementum and the geometry of the root therapy. The relative positioning characteristics of tooth assembly with the osseous alveolus/ alveolar bone, as well as the established codings are shown in table 1 and figure 8
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