The evidence supporting methods of tooth width measurement: Part I. Vernier calipers to stereophotogrammetry

Morphological studies are carried out predominantly in dental or anthropological research not just because these disciplines are directly related to teeth: dental structures are able to provide a wide-range of important information. Traditional odontological (related to teeth) study techniques can be associated, in general, to descriptive and measuring approaches. Descriptive techniques have been always more developed and compensating scarceness of odontometrics, as traditional manual measurements provide definitely insufficient information for morphological assessments – only approximate size evaluations are possi- ble. However, the presented in the article new non-contact odontometric technique has proved its capability to overcome barriers and to improve dental measuring research through obtaining dense and accurate data of significant diversity and amount to turn quantitative assessments of dental structures into qualitative and related to morphology. The method itself is based on improved interpretation of dental morphology providing two basic stages: orientation of 3D models of teeth and measurements on series of its sections. At the final stage odontometric data is captured, re-calculated and subjected to analyses.

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3D Data Analysis for Teeth Morphology Study

Gaboutchian

Knyaz

Vasilyev

et al. 2020

Proceedings of the 30th International Conference on Computer Graphics and Machine Vision (GraphiCon 2020). Part 2

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Automated Digital Odontometric Study of Manual and Computer-Aided Methods of Tooth Crown Modelling in Dentistry

Gaboutchian¹,

Knyaz

Apresyan

2019

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

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Abstract. One of the most widely used methods of prosthetic treatment in dentistry is restoration of damaged teeth by artificially fabricated crowns, which, regardless of technological variations, always pass through modelling stage. The main two methods of restoration modelling are traditionally used manual and becoming more advanced and widespread computer-aided, or digital. A similar situation is observed in odontometry – tooth measurements – where manual and digital approaches meet, fuse and new methods, as automated digital odontometry, appear. In this study the measurement method is applied to crowns modelled by different dental technicians on trial basis for teeth, prepared on stone cast model of complete dental arches. The same plaster models, before and after tooth preparations, as well as after modelling tooth crowns manually, were scanned for comparative and modelling (this time using computer-aided techniques) reasons. The obtained 3D images were used for measurements by digital automated odontometry to estimate differences of modelled crowns with initial shape of intact, subjected to experimental preparation and restoration, tooth. Comparisons were made within each, manual and digital, crown modelling groups as well; thus comparisons of proposed on default by professional dental software crown shapes were made, and in line with it the influence of different technicians adjustments on modelling precision was estimated. At the same time the measurement method was tested as well by determining the most characteristic differentiating odontometric parameters for the study, which is held largely due to and on the basis of photogrammetric techniques.

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Evaluating Measurements: A Comparative Study of Digital and Plaster Models for Orthodontic Applications in Mixed Dentition

Shin,

Chae,

Lee

et al. 2024

J Korean Acad Pediatr Dent

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This study aimed to assess the accuracy of tooth widths, intermolar widths, and arch lengths acquired through two intraoral scanners, including iTero Element Plus Series (Align Technology, Santa Clara, CA, USA) and Trios 4 (3Shape, Copenhagen, Denmark), specifically on mixed dentition. A total of 30 subjects were divided into 2 groups, each undergoing both alginate impressions and intraoral scanning using either the iTero or Trios scanner. The plaster models were measured with a caliper, while the digital models were measured virtually. In the iTero group, all tooth width measurements exhibited differences compared to the plaster values, except for maxillary left lateral incisors (p = 0.179), mandibular right (p = 0.285), and left (p = 0.073) central incisors. The Trios group did not display significant differences in any of the tooth width measurements. Intermolar width comparisons for both groups indicated differences, except for mandibular primary canine to primary canine values (p = 0.426) in the iTero group. Regarding arch length, the mandibular anterior, maxillary right, and left arch lengths in the iTero group demonstrated larger caliper values than those of iTero. Conversely, in the Trios group, all parameters showed smaller caliper values, especially in upper anterior, maxillary right, mandibular right, and mandibular left arch lengths with significance (p = 0.027, 0.007, 0.003, and 0.047, respectively). Despite the differences between the two groups, digital models might be clinically suitable alternatives for plaster models. Pediatric dentists should carefully assess these differences, as a comprehensive evaluation would result in precise orthodontic treatment planning and favorable outcomes for young patients with mixed dentition.

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The evidence supporting methods of tooth width measurement: Part I. Vernier calipers to stereophotogrammetry

Cited by 3 publications

References 21 publications

3D Data Analysis for Teeth Morphology Study

3D Data Analysis for Teeth Morphology Study

Automated Digital Odontometric Study of Manual and Computer-Aided Methods of Tooth Crown Modelling in Dentistry

Evaluating Measurements: A Comparative Study of Digital and Plaster Models for Orthodontic Applications in Mixed Dentition

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