scholarly journals Comparative Study of Concordance of Digital Models, Plaster Models, and 3D Printed Filament Models with Clinical Measurements in Children

2020 ◽  
pp. 1-11
Author(s):  
Hugo Ricardo ROSIN
Keyword(s):  
Intraclass Correlation ◽  
Reference Method ◽  
Mixed Dentition ◽  
Digital Models ◽  
Dental Measurements ◽  
Permanent Molars ◽  
3D Printed ◽  
Clinical Measurements ◽  
Plaster Models ◽  
Trios Scanner

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.

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

2016 ◽  
Vol 17 (4) ◽  
pp. 294-299 ◽  
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.

scholarly journals Reproducibility of Digital Indirect Bonding Technique Using Three-dimensional (3d) Models and 3d-printed Transfer Trays

2019 ◽  
Vol 90 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Maria Eduarda Assad Duarte ◽  
Bruno Frazão Gribel ◽  
Alice Spitz ◽  
Flavia Artese ◽  
José Augusto Mendes Miguel
Keyword(s):  
Repeated Measures ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
3D Models ◽  
Digital Models ◽  
Intraclass Correlation Coefficients ◽  
Indirect Bonding ◽  
3D Printed ◽  
Clinically Significant

ABSTRACT Objective To evaluate the reproducibility of digital tray transfer fit on digital indirect bonding by analyzing the differences in bracket positions. Materials and Methods Digital indirect bonding was performed by positioning brackets on digital models superimposed by tomography using Ortho Analyzer (3Shape) software. Thirty-three orthodontists performed indirect bonding on prototyped models of the same malocclusion using prototyped transfer trays for two types of brackets (MiniSprint Roth and BioQuick self-ligating). The models with brackets were scanned using an intraoral scanner (Trios, 3Shape). Superimpositions were made between the digital models obtained after indirect bonding and those from the original virtual setup. To analyze the differences in bracket positions, three planes were examined for each bracket: vertical, horizontal, and angulation. Three orthodontists repeated indirect bonding after 15 days, and Bland-Altman plots and intraclass correlation coefficients were used to evaluate inter- and intraevaluator reproducibility and reliability, respectively. Repeated-measures analysis of variance (ANOVA) was used to analyze the differences between bracket positions, and multivariate ANOVA was used to evaluate the influence of orthodontists' experience on the results. Results Differences between bracket positions were not statistically significant, except mesial-distal discrepancies in the BioQuick group (P = .016). However, differences were not clinically significant (horizontal varied from 0.04 to 0.13 mm; angulation, 0.45° to 2.03°). There was no significant influence of orthodontist experience and years of clinical practice on bracket positions (P = .314 and P = .158). The reproducibility among orthodontists was confirmed. Conclusions The reproducibility of digital indirect bonding was confirmed in terms of bracket positions using three-dimensional printed transfer trays.

scholarly journals A New Method to Evaluate Trueness and Precision of Digital and Conventional Impression Techniques for Complete Dental Arch

2021 ◽  
Vol 11 (10) ◽  
pp. 4612
Author(s):  
KweonSoo Seo ◽  
Sunjai Kim
Keyword(s):  
Intraclass Correlation ◽  
Three Dimensional ◽  
New Method ◽  
Digital Impression ◽  
Dental Arch ◽  
Digital Models ◽  
Digital Impressions ◽  
Measuring Machine ◽  
Master Model ◽  
Conventional Impression

Purpose: The aim of this study was to present a new method to analyze the three-dimensional accuracy of complete-arch dental impressions and verify the reliability of the method. Additionally, the accuracies of conventional and intraoral digital impressions were compared using the new method. Methods: A master model was fabricated using 14 milled polyetheretherketone cylinders and a maxillary acrylic model. Each cylinder was positioned and named according to its corresponding tooth position. Twenty-five definitive stone casts were fabricated using conventional impressions of the master model. An intraoral scanner was used to scan the master model 25 times to fabricate 25 digital models. A coordinate measuring machine was used to physically probe each cylinder in the master model and definitive casts. An inspection software was used to probe cylinders of digital models. A three-dimensional part coordinate system was defined and used to compute the centroid coordinate of each cylinder. Intraclass correlation coefficient (ICC) was evaluated to examine the reliability of the new method. Independent two sample t-test was performed to compare the trueness and precision of conventional and intraoral digital impressions (α = 0.05). Results: ICC results showed that, the new method had almost perfect reliability for the measurements of the master model, conventional and digital impression. Conventional impression showed more accurate absolute trueness and precision than intraoral digital impression for most of the tooth positions (p < 0.05). Conclusions: The new method was reliable to analyze the three-dimensional deviation of complete-arch impressions. Conventional impression was still more accurate than digital intraoral impression for complete arches.

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

2014 ◽  
Vol 19 (4) ◽  
pp. 107-113 ◽  
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.

scholarly journals Digital models and orthodontic diagnosis: what degree of reliability?

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.

Three-dimensional dental measurements: An alternative to plaster models

2010 ◽  
Vol 137 (2) ◽  
pp. 259-265 ◽  
Author(s):  
Hend Mohammed El-Zanaty ◽  
Amr Ragab El-Beialy ◽  
Amr Mohammed Abou El-Ezz ◽  
Khaled Hazem Attia ◽  
Ahmed Ragab El-Bialy ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dental Measurements ◽  
Plaster Models

Localization of first permanent molars in lateral cephalometric and panoramic radiographs from early mixed dentition to early permanent dentition

2001 ◽  
Vol 25 (4) ◽  
pp. 303-306 ◽  
Author(s):  
Hung-Huey Tsai
Keyword(s):  
Permanent Dentition ◽  
Mixed Dentition ◽  
Panoramic Radiographs ◽  
Permanent Molars ◽  
First Permanent Molars

Changes in position and mesiodistal angulations of maxillary and mandibular first permanent molars from early mixed dentition to early permanent dentition were measured on panoramic radiographs and compared with the values measured on lateral cephalometric radiographs. It was found that the maxillary and mandibular first permanent molars were uprighted gradually, drifted mesially and vertically, and that the changes in mesiodistal angulations were clearly on the panoramic radiographs in comparison with the cephalometric radiographs.

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