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Caries is a common disease of hard tissues of teeth which results in dental cavities, which are usually replaced by dental filling. Matching the color of a dental filling is usually a subjective assessment. In this study we conducted a color analysis of GC Gradia Direct shade guide in the lighting conditions of the dental office. Color measurement was performed using Color Grab mobile app and the...
This paper presents the image recognition results using the proposed HDM (Hybrid Differential Method) and its turn point. Derivative of HDM results are taken to analyse the point-symmetric feature of the match point. The results are discussed to determine creteria if the pattern match is found or not. The method is applied to search a specific image from a bigger target picture. The results show that...
The significance of identifying early non-cavitated carious lesions and monitoring the lesion extent has led to increasing prospects for prevention, early diagnosis, and implementation of conservative treatments. This paper emphasizes the importance of speckle reduction and possible lesion segmentation options of optical coherence tomography (OCT) images prior to caries detection. First, a comparison...
Automatic tooth restoration produces customized teeth with a prepared cavity, while the fitting of the restoration is determined by the boundary feature of the cavity. An improved method of 3D optimal path searching to precisely detect the borderline for extraction using intelligent scissors is presented here. Identified by the minimum weighted sum local cost functions of the boundary features in...
Oral cancer is the sixth most common cancer in the world. It is one of the most prevalent cancers in the developing countries of South Asia accounting for one third of the world burden. Sixty percent of the cancers are advanced by the time they are detected. Two methods of optical spectroscopy for detection of oral cancer have been discussed here. These methods are simple, easy to handle and noninvasive...
Raman spectral imaging has been widely used for extracting chemical information from biological specimens. One of the challenging problems is to cluster the chemical groups from the vast amount of hyperdimensional spectral imaging data so that functionally similar groups can be identified. Moreover, the poor signal to noise ratio makes the problem more difficult. In the paper, we introduce a novel...
The purpose of this study is to solve the problems that lie in the current research on mandibular movement and dynamic occlusion of complete denture in the field of dental restoration. On the basis of the theory of spatial mechanisms, the displacement matrix of mandibular movement on Hanau articulator is established through the method of direction cosine matrix. By adopting techniques such as laser...
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