Multi-camera systems use for dental arch shape measurement

Procházka, Aleš; Kašparová, Martina; Yadollahi, Mohammadreza; Vyšata, Oldřich; Grajciarová, Lucie

doi:10.1007/s00371-014-1029-z

Cited by 7 publications

(12 citation statements)

References 35 publications

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“…While manual measurements of plaster casts can be used, it is possible to create digital models of them [22] and collect these measurements using general image processing methods applied to images from a single camera, as presented in Figure 4. Manually detected rectangular regions A and B can be then used for the automatic detection of their extreme values applied to the thresholded image.…”

Section: Camera Systems In Orthodontic Measures Evaluationmentioning

confidence: 99%

“…The whole methodology related to the AR in stomatology is based upon the use of specific sensors, cameras, contactless scanners [18], and (wireless) communication links, followed by 3D object reconstruction. Applications of these methods assume the knowledge of optics [20], engineering [21], biomechanics, information technologies [22,23], and material sciences.…”

Section: Introductionmentioning

confidence: 99%

“…Special attention is devoted to processing the data recorded by an intra-oral contactless scanner [20,[29][30][31][32][33][34], as presented in Figure 2a, which allows the construction of 3D models as a basic step in the whole complex digitization process. The resulting data are then de-noised and analyzed to select the dental measures [22] that are important for the treatment of specific disorders. Image registration methods are then used to compare images during the treatment and to analyze its time evolution.…”

Section: Introductionmentioning

confidence: 99%

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Augmented Reality Implementations in Stomatology

et al. 2019

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Augmented reality has a wide range of applications in many areas that can extend the study of real objects into the digital world, including stomatology. Real dental objects that were previously examined using their plaster casts are often replaced by their digital models or three-dimensional (3D) prints in the cyber-physical world. This paper reviews a selection of digital methods that have been applied in dentistry, including the use of intra-oral scanning technology for data acquisition and evaluation of fundamental features of dental arches. The methodology includes the use of digital filters and morphological operations for spatial objects analysis, their registration, and evaluation of changes during the treatment of specific disorders. The results include 3D models of selected dental arch objects, which allow a comparison of their shape and position during repeated observations. The proposed methods present digital alternatives to the use of plaster casts for semiautomatic evaluation of dental arch measures. This paper describes some of the advantages of 3D digital technology replacing real world elements and plaster cast dental models in many areas of classical stomatology.

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Section: Camera Systems In Orthodontic Measures Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Augmented Reality Implementations in Stomatology

et al. 2019

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“…The use of different sensors is essential for acquisition of digital models to estimate dental arch parameters or to print separate three-dimensional (3D) objects using 3D printers [9]. This modern interdisciplinary approach assumes a combination of knowledge from dentistry [10], optics [11], engineering [12], biomechanics [13], information technologies [14,15], and material sciences. Using digital technologies, orthodontists can more accurately analyze dental problems, their treatment, more precisely specify the refabrication tasks, and collaborate with further specialists as well.…”

Section: Introductionmentioning

confidence: 99%

“…To increase the reliability of the measurement, electronic dental arch models were rotated into the specific dental planes defined by the tops of individual teeth. This approach allowed a more precise comparison of dental arch changes [14] for separate scans.…”

Section: Introductionmentioning

confidence: 99%

Intra-Oral 3D Scanning for the Digital Evaluation of Dental Arch Parameters

2018

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Intra-oral scanning technology has brought a completely new approach to examination methods in dentistry. In comparison to traditional plaster casts, it allows more precise digital analysis of dental arch components during the treatment of dental disorders. Data acquired can also be used for the creation of three-dimensional (3D) models using 3D printers. This paper describes a data acquisition system, the mathematical processing of resulting three-dimensional model, and the statistical analysis of selected parameters of the dental arch. The study aims at comparing the results achieved from 20 models of the same individual acquired by different specialists. The proposed methodology includes mathematical rotation of objects into the optimal plane defined by the teeth tops' location to increase the accuracy of the resulting parameters. The mean evaluated distances between canines (3-3) and premolars (5-5) are 24.29 mm and 37.98 mm, respectively, for the lower dental arch. The proposed object rotation increased these distance by 0.9% and 1.4%, respectively, reducing the rotation error. Moreover, the variability of results decreased and the mean value of the coefficient of variation was lowered by 12%. Image registration was then used to evaluate changes of dental arch parameters. This paper presents the advantages of digital models for visualisation of the dental arch allowing its flexible rotation and evaluation of its parameters.

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