By R. M. Natal Jorge, Sonia M. Santos, João Manuel R. S. Tavares
The purpose of Biodental Engineering is to solidify wisdom of bioengineering utilized to dentistry. Dentistry is a department of medication with its personal peculiarities and intensely varied parts of motion, and lately a number of new ideas and applied sciences were brought. This e-book is a set of keynote lectures and entire papers from Biodental 2009 (Porto, Portugal, 26-27 June 2009). The contributions are from 9 nations and supply a complete assurance of the present cutting-edge on numerous medical and suitable fields, such as: Biomechanical issues Orthodontics Implantology Aesthetics Dental structures scientific units scientific pictures The recommendations and methodologies coated during this publication contain, between others, the finite aspect approach, experimental options, composite fabrics, scientific experiences, biomaterials, quick prototyping, fracture mechanics, osseointegration, biomechanics, dental prostheses, picture processing and research, dental platforms and equipments and mechanical biology. The publication comes in handy to dentists, engineers, researchers and scholars in fields of bioengineering, and to providers and prone of clinical platforms, apparatus and providers related to dentistry.
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The result obviously strongly depends on the chosen threshold. The Otsu method (Otsu 1979) allows to find the optimal threshold to binarize the image. It can be used also for n-levels segmentation. For the considered images a four levels segmentation was advisable. The Otsu method was applied hierarchically: first a binarization, obtaining a black and white image, and then each region (the white region and the black one) is further binarized, obtaining the four levels segmentation. The obtained segmented image is a simpler representation of the original data.
Indb 32 10/28/2009 5:08:19 PM Figure 4b, where B3 thickness is equal to zero, and Figure 4d. The enamel is constituted by one fragment and the number of Euler is equal to one: these two characteristics mean that a fracture is present. 175 mm). A global overview of all the collected information allows to assert that in the lower part of the M side and in the B side, a weakness in the enamel is present. 1756 mm in the M side. In Figure 7 the segmented images of the above levels are shown respectively.
The dimensions of the periodontal ligament were derived from the literature (Lindhe & Karring 1989, Schroeder & Page 1990). 4. A three-dimensional mesh was created, and the stress distribution analysis was performed. Boundary conditions have been established on the outer surface of the surrounding ligament. It has been estimated that the boundary conditions were applied far enough from force application point to not significantly influence the stress distribution in different part of the tooth.