Orientation vs. Orientation: Image Processing for Studies of Dental Morphology

Gaboutchian, A. V.; Knyaz, V. A.; Vasilyev, Sergey; Корост, Д. В.; Kudaev, A. A.

doi:10.5194/isprs-archives-xliii-b2-2021-723-2021

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…We should mention that the use of tomographic imaging allows accurate reconstruction and clear access to morphological structures, which is due to different circumstances can be completely hidden or non-obvious for correct detection. Thus, the edge of cervical enamel has been tested for orientation algorithms in automated digital odontometry in line with occlusal surface contour (Gaboutchian et al, 2021), which we consider a reliable morphological structure as a reference landmark.…”

Section: Methodsmentioning

confidence: 99%

“…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%

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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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Section: Methodsmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

show abstract

“…We should mention that the use of tomographic imaging allows accurate reconstruction and clear access to morphological structures, which is due to different circumstances can be completely hidden or non-obvious for correct detection. Thus, the edge of cervical enamel has been tested for orientation algorithms in automated digital odontometry in line with occlusal surface contour [67], which we consider a reliable morphological structure as a reference landmark.…”

Section: Orientation Of Teethmentioning

confidence: 99%

New Approach to Dental Morphometric Research Based on 3D Imaging Techniques

2021

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Recent progress in imaging and image processing techniques has provided for improvements in odontological research in a variety of aspects. Thus, the presented method has been developed precisely in order to assess metrically 3D reconstructions of teeth. Rapidly and accurately obtained data of a wide range and appropriate density are sufficient enough for morphometric studies rather than tooth size assessments which are inherent to conventional techniques. The main contributions providing for holistic and objective morphometric analysis of teeth are the following: (1) interpretation of basic dental morphological features; (2) automated of orientational coordinate system setup based on tooth surface analysis; (3) new tooth morphometric parameters which could not be obtained through application of conventional odontometric techniques; (4) methodological novelty for automated odontomorphometric analysis pipeline. Application of tomographic imaging, which has been used for obtaining 3D models, expands the proposed method potential further through providing detailed and comprehensive reconstructions of teeth. The current study was conducted on unique material from the archaeological site of Sunghir related to the Upper Palaeolithic period. Metric assessments of external and internal morphological layers of teeth were performed in common orientation and sectioning. The proposed technique allowed more profound analysis of Sunghirian teeth which date back to the times of modern human morphology formation.

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

Gaboutchian

Knyaz

Vasilyev

et al. 2022

Proceedings of the 32nd International Conference on Computer Graphics and Vision

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Today micro-focus tomographic scanning methods are widely used in anthropological and palaeoanthropological research. Facilitating application of non-destructive study techniques, it provides essential, detailed and accurate data in terms of dental morphology. These features become of particular importance in studies of unique findings, such as presented in this paper Upper Palaeolithic Sunghirian samples. A range of techniques are applied to study 3D reconstructions of teeth; some of them are taken directly from traditional methods applied to physical objects, others developed on the bases provided by of digital techniques of image processing and analysis. However the majority of research techniques, especially those based on measurements, require appropriate orientation of the teeth being studied. In this regard it should be noted that human teeth have, different morphology which depends to a great extent on their position in arches; in addition teeth are composed of different tissues. Hence these determining factors influence variety of approaches to image processing. The current paper presents fully automated algorithm for orientation of canines, or more specifically, their coronal part composed of enamel. This provides data for 2D and 3D morphological studies usually related to evolutionary aspects or sexual dimorphism.

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Orientation vs. Orientation: Image Processing for Studies of Dental Morphology

Cited by 3 publications

References 20 publications

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

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

New Approach to Dental Morphometric Research Based on 3D Imaging Techniques

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

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