Digital Analysis and Processing of 3D Reconstructions of Human Canine Teeth

Gaboutchian, A. V.; Knyaz, V. A.; Vasilyev, Sergey; Maximov, Anatoly Alexandrovich; Korost, D. V.; Stepanov, Nikita Valerievich; Petrosyan, G. R.; Apresyan, Samvel V.

doi:10.20948/graphicon-2022-657-667

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…This edge contour was found by applying automated algorithms and subsequently used for the preliminary setting of the coordinate system and the orientation of the 3D reconstructions of the studied tooth. A similar technique was proposed for canines [51]. Due to multiple irregular pits on the studied teeth, we used a combination of fully automated algorithms that were initially developed for studies on human teeth, and manually operated the procedures.…”

Section: Algorithm 1: Tooth Enamel Cap Segmentationmentioning

confidence: 99%

Measuring Dental Enamel Thickness: Morphological and Functional Relevance of Topographic Mapping

et al. 2023

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The interest in the development of dental enamel thickness measurement techniques is connected to the importance of metric data in taxonomic assessments and evolutionary research as well as in other directions of dental studies. At the same time, advances in non-destructive imaging techniques and the application of scanning methods, such as micro-focus-computed X-ray tomography, has enabled researchers to study the internal morpho-histological layers of teeth with a greater degree of accuracy and detail. These tendencies have contributed to changes in established views in different areas of dental research, ranging from the interpretation of morphology to metric assessments. In fact, a significant amount of data have been obtained using traditional metric techniques, which now should be critically reassessed using current technologies and methodologies. Hence, we propose new approaches for measuring dental enamel thickness using palaeontological material from the territories of northern Vietnam by means of automated and manually operated techniques. We also discuss method improvements, taking into account their relevance for dental morphology and occlusion. As we have shown, our approaches demonstrate the potential to form closer links between the metric data and dental morphology and provide the possibility for objective and replicable studies on dental enamel thickness through the application of automated techniques. These features are likely to be effective in more profound taxonomic research and for the development of metric and analytical systems. Our technique provides scope for its targeted application in clinical methods, which could help to reveal functional changes in the masticatory system. However, this will likely require improvements in clinically applicable imaging techniques.

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Section: Algorithm 1: Tooth Enamel Cap Segmentationmentioning

confidence: 99%

Measuring Dental Enamel Thickness: Morphological and Functional Relevance of Topographic Mapping

et al. 2023

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“…In our previous works on developing automated measuring techniques, cervical margin become one of the important structures for orientating teeth along the vertical axis (Gaboutchian et al, 2021), (Gaboutchian et al, 2023). However the cervical structures themselves attract more interest as study ob-jects, and therefore further extension of the odontometric technique for the analysis of cervical outlines is in the process of development.…”

Section: Introductionmentioning

confidence: 99%

Influence of 3D models choice on cervical outline measurements of teeth

Gaboutchian,

Knyaz,

Maximov

et al. 2024

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Among different study techniques, which are used in dental research, measurements of teeth play one of the most important roles. However classical measurement techniques usually show consistent results on morphologically complete objects, while teeth can be found in different conditions, depending, for instance, on the natural wear degree. In order to increase the sample, which is especially important when findings are not abundant, and to improve the analytical part, alternative techniques have been proposed, among which cervical measurements are considered to be informative, especially taking into consideration morphological and methodological importance of the cervical area. Algorithms of automated digital measurement techniques also use the cervical area for providing stability of results. Visualisation of the tooth cervical margin and reconstruction of its projections can be achieved by two conventional imaging techniques, which are tomography (preferably high-resolution) and intra-oral confocal optical scanning. They both were used for obtaining 3D reconstruction of upper premolar taken from palaeoanthropological materials. In line with applying the same automated coordinate system setting algorithm to both types of reconstructions, contours of their enamel cervical margins were defined and their projections to horizontal plane were obtained and measured. Despite the fact that 3D reconstructions from different imaging sources technically can serve for running automated odontometry, measurement results, especially in comparative studies, should be handled with attention.

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“…In our works setting these contours is based on surface curvature analysis and subsequent setting of orientation axis direction. In addition enamel cervical margin has been also used in our previously conducted studies for orientation (Gaboutchian et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Approaches to Orientation of High Resolution Tomographic 3d Reconstruction of Teeth in Metric Studies

Gaboutchian

Knyaz

Simonyan

et al. 2023

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Metric studies of teeth is a rapidly developing direction in odontological research, which is supported by means of corresponding imaging techniques for obtaining detailed digital reconstructions, and by application of image analysis methods. The current article presents methodological extension of teeth 3D models’ orientation tactics, which have been used in measurement techniques in dental, palaeoanthropological and palaeontological studies. Today image analysis has sufficient potential to perform orientation of teeth on the bases of their natural features; at the same time teeth possesses all necessary morphological structures for performing orientation on 3D reconstructions obtained by means of widely used today imaging techniques. Our aim is in providing an approach to orientation of teeth for its further use in morphologically relevant, accurate and applicable for various types of research, measurement techniques. The palaeoanthropological material presented in this paper, on which the proposed technique has been tested, is from territories of European part of Russian Federation and Republic of Armenia; it has been classified as related to the Middle Bronze Age, and is planned to be studied in a wider scope in the future. X-ray micro-focus tomography has been used for obtaining reconstructions of lower molars, which were segmented from semi-mandible 3D models. These teeth were used for setting vertical axis direction by means of surface curvature analysis and calculations based on points’ coordinates, which delineate functionally and morphologically important parts of teeth. This approach to accurate and morphologically relevant orientation of the studied teeth uses more than one structure at a time for choosing correct orientation according to aims of research and features of the studied material. This provides the proposed technique necessary potential to be applied for measurements of teeth and studies of their functional changes.

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Digital Analysis and Processing of 3D Reconstructions of Human Canine Teeth

Cited by 3 publications

References 24 publications

Measuring Dental Enamel Thickness: Morphological and Functional Relevance of Topographic Mapping

Measuring Dental Enamel Thickness: Morphological and Functional Relevance of Topographic Mapping

Influence of 3D models choice on cervical outline measurements of teeth

Approaches to Orientation of High Resolution Tomographic 3d Reconstruction of Teeth in Metric Studies

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