Comparison of dental measurements between conventional plaster models, digital models obtained by impression scanning and plaster model scanning

Objective: The present study aimed to evaluate, in pediatric patients, the concordance of intraoral scanner for dental measurements, comparing the measurements obtained clinically with digital models, 3D printed filament models, and conventional plaster models. Materials and Methods: For this study, 31 patients with mixed dentition were selected, with at least the upper central incisors and upper first permanent molars erupted. The dental size measurement obtained with 3Shape Trios Scanner was compared with that obtained clinically with the aid of a digital caliper, as well as the measurements made with plaster models and filament printed models. For data analysis, the intraclass correlation coefficient (ICC) was performed and the agreement was categorized according to it. The Bland–Altman analysis was also applied to the data to graphically display the concordance. Results: There was no difference in agreement between measurements made in plaster and filament models compared to the reference method, and for measurements in the digital model, the agreement was low or zero in the molar region. Conclusion: According to the present study, we can conclude that both plaster and filament models presented values that are faithful to those obtained clinically and that the evaluated region affected the agreement with the reference method.

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Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1599 ◽

2014 ◽

Vol 15 (6) ◽

pp. 681-687 ◽

Cited By ~ 3

Author(s):

Mateus Rodrigues Tonetto ◽

Matheus Coelho Bandéca ◽

Mônica Barros Silva ◽

Betina Grehs Porto ◽

Thiago Soares Porto ◽

...

Keyword(s):

Digital Images ◽

Three Dimensional ◽

Laser Scanner ◽

San Jose ◽

Digital Models ◽

Linear Measurements ◽

Treatment Plans ◽

Three Dimensional Images ◽

Plaster Model ◽

Plaster Models

ABSTRACT Digital models are an alternative for carrying out analyses and devising treatment plans in orthodontics. The objective of this study was to evaluate the accuracy and the reproducibility of measurements of tooth sizes, interdental distances and analyses of occlusion using plaster models and their digital images. Thirty pairs of plaster models were chosen at random, and the digital images of each plaster model were obtained using a laser scanner (3Shape R-700, 3Shape A/S). With the plaster models, the measurements were taken using a caliper (Mitutoyo Digimatic®, Mitutoyo (UK) Ltd) and the MicroScribe (MS) 3DX (Immersion, San Jose, Calif). For the digital images, the measurement tools used were those from the O3d software (Widialabs, Brazil). The data obtained were compared statistically using the Dahlberg formula, analysis of variance and the Tukey test (p < 0.05). The majority of the measurements, obtained using the caliper and O3d were identical, and both were significantly different from those obtained using the MS. Intra-examiner agreement was lowest when using the MS. The results demonstrated that the accuracy and reproducibility of the tooth measurements and analyses from the plaster models using the caliper and from the digital models using O3d software were identical. How to cite this article Porto BG, Porto TS, Silva MB, Grehs RA, dos Santos Pinto A, Bhandi SH, Tonetto MR, Bandéca MC, dos Santos-Pinto LAM. Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images. J Contemp Dent Pract 2014;15(6):681-687.

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Tooth-size discrepancy: A comparison between manual and digital methods

Dental Press Journal of Orthodontics ◽

10.1590/2176-9451.19.4.107-113.oar ◽

2014 ◽

Vol 19 (4) ◽

pp. 107-113 ◽

Cited By ~ 11

Author(s):

Gabriele Dória Cabral Correia ◽

Fernando Antonio Lima Habib ◽

Carlos Jorge Vogel

Keyword(s):

Three Dimensional ◽

Diagnostic Tools ◽

Tooth Size ◽

Digital Models ◽

Linear Measurements ◽

Length Discrepancy ◽

Technological Advances ◽

Size Discrepancy ◽

Digital Methods ◽

Plaster Models

INTRODUCTION: Technological advances in Dentistry have emerged primarily in the area of diagnostic tools. One example is the 3D scanner, which can transform plaster models into three-dimensional digital models. OBJECTIVE: This study aimed to assess the reliability of tooth size-arch length discrepancy analysis measurements performed on three-dimensional digital models, and compare these measurements with those obtained from plaster models. MATERIAL AND METHODS: To this end, plaster models of lower dental arches and their corresponding three-dimensional digital models acquired with a 3Shape R700T scanner were used. All of them had lower permanent dentition. Four different tooth size-arch length discrepancy calculations were performed on each model, two of which by manual methods using calipers and brass wire, and two by digital methods using linear measurements and parabolas. RESULTS: Data were statistically assessed using Friedman test and no statistically significant differences were found between the two methods (P > 0.05), except for values found by the linear digital method which revealed a slight, non-significant statistical difference. CONCLUSIONS: Based on the results, it is reasonable to assert that any of these resources used by orthodontists to clinically assess tooth size-arch length discrepancy can be considered reliable.

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Digital models and orthodontic diagnosis: what degree of reliability?

Integrative Journal of Medical Sciences ◽

10.15342/ijms.2021.384 ◽

2021 ◽

Vol 8 ◽

Author(s):

ABDOUL Hafizou RABE ◽

Fatima SALEK ◽

Intissar El IDRISSI ◽

Fatima ZAOUI ◽

Hicham BENYAHIA

Keyword(s):

Systematic Review ◽

Numerical Models ◽

Meta Analysis ◽

Physical Models ◽

Cochrane Library ◽

Digital Models ◽

Significant Difference ◽

Clinically Significant ◽

Conventional Models ◽

Plaster Models

Abstract Background: Our study aims to evaluate, through a systematic review, the reliability of numerical models compared to conventional models on the main parameters of orthodontic diagnosis Method: four databases were consulted: PubMed; Google Scholar, Cochrane Library, and Ebscohost. The research included published studies since 2010, meta-analysis studies, randomized and non-randomized controlled trials, prospective and retrospective studies. Results: Among 3811 selected references, only five studies met our inclusion criteria. In the systematic review, there were statistical differences between the digital models and the plaster models. However, this difference is clinically acceptable. On the other hand, there are some limitations, relative to the types of the severity of the congestion, the elapsed time to digitize, and the numerical means. Conclusion: The results of our systematic review have shown that there is no clinically significant difference between the numerical and physical models for the majority of diagnostic parameters.

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Accuracy and reproducibility of measurements on plaster models and digital models created using an intraoral scanner

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie ◽

10.1007/s00056-016-0070-0 ◽

2017 ◽

Vol 78 (3) ◽

pp. 211-220 ◽

Cited By ~ 12

Author(s):

Leonardo Tavares Camardella ◽

Hero Breuning ◽

Oswaldo de Vasconcellos Vilella

Keyword(s):

Intraoral Scanner ◽

Digital Models ◽

Plaster Models

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Accuracy of Bolton analysis measured in laser scanned digital models compared with plaster models (gold standard) and cone-beam computer tomography images

The Korean Journal of Orthodontics ◽

10.4041/kjod.2016.46.1.13 ◽

2016 ◽

Vol 46 (1) ◽

pp. 13 ◽

Cited By ~ 6

Author(s):

Jooseong Kim ◽

Manuel O. Lagravére

Keyword(s):

Computer Tomography ◽

Gold Standard ◽

Cone Beam ◽

Digital Models ◽

Plaster Models ◽

Cone Beam Computer Tomography

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The Accuracy and Reproducibility of Linear Measurements Made on CBCT-derived Digital Models

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1844 ◽

2016 ◽

Vol 17 (4) ◽

pp. 294-299 ◽

Cited By ~ 3

Author(s):

Mohammad Y Hajeer ◽

Ahmad L Maroua ◽

Mowaffak Ajaj

Keyword(s):

Intraclass Correlation ◽

Correlation Coefficients ◽

Intraobserver Reliability ◽

Altman Analysis ◽

Digital Models ◽

Linear Measurements ◽

Bland Altman Analysis ◽

Accuracy Of Measurements ◽

The Mean ◽

Plaster Models

ABSTRACT Objective To evaluate the accuracy and reproducibility of linear measurements made on cone-beam computed tomography (CBCT)-derived digital models. Materials and methods A total of 25 patients (44% female, 18.7 ± 4 years) who had CBCT images for diagnostic purposes were included. Plaster models were obtained and digital models were extracted from CBCT scans. Seven linear measurements from predetermined landmarks were measured and analyzed on plaster models and the corresponding digital models. The measurements included arch length and width at different sites. Paired t test and Bland–Altman analysis were used to evaluate the accuracy of measurements on digital models compared to the plaster models. Also, intraclass correlation coefficients (ICCs) were used to evaluate the reproducibility of the measurements in order to assess the intraobserver reliability. Results The statistical analysis showed significant differences on 5 out of 14 variables, and the mean differences ranged from −0.48 to 0.51 mm. The Bland–Altman analysis revealed that the mean difference between variables was (0.14 ± 0.56) and (0.05 ± 0.96) mm and limits of agreement between the two methods ranged from −1.2 to 0.96 and from −1.8 to 1.9 mm in the maxilla and the mandible, respectively. The intraobserver reliability values were determined for all 14 variables of two types of models separately. The mean ICC value for the plaster models was 0.984 (0.924–0.999), while it was 0.946 for the CBCT models (range from 0.850 to 0.985). Conclusion Linear measurements obtained from the CBCTderived models appeared to have a high level of accuracy and reproducibility. How to cite this article Maroua AL, Ajaj M, Hajeer MY. The Accuracy and Reproducibility of Linear Measurements Made on CBCT-derived Digital Models. J Contemp Dent Pract 2016;17(4):294-299.

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