Automatic Recognition of Landmarks on Digital Dental Models

Background: Due to advances in digital technology, it is possible to obtain digital dental models through intraoral scanning. The stereolithographic data collected from the scanner can subsequently be printed into a three-dimensional dental model in resinic material. However, the accuracy between digital dental models and printed dental models needs to be evaluated since it might affect diagnosis and treatment planning in orthodontic treatment. This study aimed to evaluate the accuracy of digital models scanned by a Trios intraoral scanner and three-dimensional dental models printed using a Formlabs 2 3D printer in linear measurements and Bolton analysis. Methods: A total of 35 subjects were included in this study. All subjects were scanned using a Trios intraoral scanner to obtain digital study models. Stereolithographic data from previous scanning was printed using a Formlabs 2 3D printer to obtain printed study models. Mesiodistal, intercanine, intermolar, and Bolton analysis from all types of study models were measured. The intraclass correlation coefficient was used to assess intraobserver and interobserver reliability. All data were then statistically analyzed. Results: The reliability tests were high for both intraobserver and interobserver reliability, which demonstrates high reproducibility for all measurements on all model types. Most of the data compared between study models showed no statistically significant differences, though some data differed significantly. However, the differences are considered clinically insignificant. Conclusion: Digital dental models and three-dimensional printed dental models may be used interchangeably with plaster dental models for diagnostic and treatment planning purposes. Keywords: Accuracy, 3D printing, digital dental model, printed dental model.

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Asymmetric dental arch treatment with Forsus fatigue appliances: Long-term results

The Angle Orthodontist ◽

10.2319/092718-697.1 ◽

2019 ◽

Vol 89 (5) ◽

pp. 688-696 ◽

Cited By ~ 1

Author(s):

Mehmet Akın ◽

Emire Aybuke Erdur ◽

Onur Öztürk

Keyword(s):

Repeated Measures ◽

Class Ii ◽

Long Term Results ◽

Dental Arch ◽

Retention Period ◽

Repeated Measures Analysis ◽

Dental Models ◽

Digital Dental Models

ABSTRACT Objectives: To investigate the treatment efficacy and follow-up stability of the asymmetric Forsus appliance by evaluating longitudinal changes in dental arch asymmetry on digital dental models from 21 patients. Materials and Methods: Maxillary and mandibular reference lines were used for measurements of intra-arch asymmetry at pretreatment (T1), posttreatment (T2), and 4.2 years after treatment (T3). Maxillary and mandibular measurements were performed relative to the dental midline and anterior reference line on digital dental models. To determine the amount of asymmetry between the Class I and Class II sides of a given arch, all maxillary and mandibular parameters were measured on each side of the model separately. Repeated-measures analysis of variance/paired sample t-tests were performed to evaluate dental arch asymmetries at the P < .05 level. Results: The alveolar transverse dimensions of the posterior segment of both arches were increased during treatment (P < .05) and remained stable during the retention period. Class II subdivision malocclusion was caused by distal positioning of the mandibular canine, premolars, and first molar on the Class II side (P < .05). Asymmetry was resolved by treatment with asymmetric Forsus appliances. The resolved asymmetry remained stable over the long term. There were no significant differences between T2 and T3 (P > .05). Conclusions: The asymmetric Forsus appliance can be used to treat dental arch asymmetry in patients with Class II subdivision malocclusions.

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Artifact-Resistant Superimposition of Digital Dental Models and Cone-Beam Computed Tomography Images

Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.joms.2013.06.199 ◽

2013 ◽

Vol 71 (11) ◽

pp. 1933-1947 ◽

Cited By ~ 33

Author(s):

Hsiu-Hsia Lin ◽

Wen-Chung Chiang ◽

Lun-Jou Lo ◽

Sam Sheng-Pin Hsu ◽

Chien-Hsuan Wang ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Computed Tomography Images ◽

Dental Models ◽

Digital Dental Models

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Impact of manual control point selection accuracy on automated surface matching of digital dental models

Clinical Oral Investigations ◽

10.1007/s00784-017-2155-6 ◽

2017 ◽

Vol 22 (2) ◽

pp. 801-810 ◽

Cited By ~ 8

Author(s):

Kathrin Becker ◽

Benedict Wilmes ◽

Chantal Grandjean ◽

Dieter Drescher

Keyword(s):

Control Point ◽

Manual Control ◽

Surface Matching ◽

Point Selection ◽

Selection Accuracy ◽

Dental Models ◽

Digital Dental Models

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Accuracy of digital dental models and three-dimensional printed dental models in linear measurements and Bolton analysis

F1000Research ◽

10.12688/f1000research.31865.2 ◽

2021 ◽

Vol 10 ◽

pp. 180

Author(s):

William Suryajaya ◽

Maria Purbiati ◽

Nada Ismah

Keyword(s):

Treatment Planning ◽

Interobserver Reliability ◽

Intraclass Correlation ◽

Three Dimensional ◽

3D Printer ◽

Intraoral Scanner ◽

Linear Measurements ◽

Dental Model ◽

Dental Models ◽

Digital Dental Models

Background: Due to advances in digital technology, it is possible to obtain digital dental models through intraoral scanning. The stereolithographic data collected from the scanner can subsequently be printed into a three-dimensional dental model in resinic material. However, the accuracy between digital dental models and printed dental models needs to be evaluated since it might affect diagnosis and treatment planning in orthodontic treatment. This study aimed to evaluate the accuracy of digital models scanned by a Trios intraoral scanner and three-dimensional dental models printed using a Formlabs 2 3D printer in linear measurements and Bolton analysis. Methods: A total of 35 subjects were included in this study. All subjects were scanned using a Trios intraoral scanner to obtain digital study models. Stereolithographic data from previous scanning was printed using a Formlabs 2 3D printer to obtain printed study models. Mesiodistal, intercanine, intermolar, and Bolton analysis from all types of study models were measured. The intraclass correlation coefficient was used to assess intraobserver and interobserver reliability. All data were then statistically analyzed. Results: The reliability tests were high for both intraobserver and interobserver reliability, which demonstrates high reproducibility for all measurements on all model types. Most of the data compared between study models showed no statistically significant differences, though some data differed significantly. However, the differences are considered clinically insignificant. Conclusion: Digital dental models and three-dimensional printed dental models may be used interchangeably with plaster dental models for diagnostic and treatment planning purposes. Keywords: Accuracy, 3D printing, digital dental model, printed dental model.

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Global Dental Arch Dimension Norms and Sexual Disparities: An overview

Bangladesh Journal of Medical Science ◽

10.3329/bjms.v18i1.39543 ◽

2018 ◽

Vol 18 (1) ◽

pp. 30-35

Author(s):

Rafiqul Islam ◽

Mohammad Khursheed Alam ◽

Fazal Shahid ◽

Mohd Fadhli Khamis

Keyword(s):

Observational Studies ◽

Orthodontic Treatment ◽

Web Of Science ◽

Selection Process ◽

Medical Science ◽

Measurement Methods ◽

Dental Arch ◽

Dental Models ◽

Digital Dental Models

Background: The aim of the present study was to do an overview of the arch dimension for various populations. Also, to evaluate the various type of measurement methods and sexual disparities. Two reviewers independently performed the selection process and the quality of studies was assessed. Method: Studies published form January 2000 until October 2015 were identified in electronic databases: Pubmed, Scopus, Science direct, Web of Science, Medpilot and Medline using keywords.Criteria used included: observational studies, Arch size measured, Permanent dentition, Arch dimension investigated via plaster and digital dental models, measurement via calipers and computers software’s. Result: The forest plots showed the continuous trend for the greater arch dimension for male in relation to female. The current overview showed the arch dimension and its disparities for various populations. Conclusion: The various methods to assess arch dimension should be carefully considered and well conducted as part of the clinical assessment of orthodontic treatment, since arch dimension could influence the diagnosis and treatment planning of orthodontist. Bangladesh Journal of Medical Science Vol.18(1) 2019 p.30-35

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