Comparison of accuracy of mesiodistal tooth measurements made in conventional study models and digital models obtained from intraoral scan and desktop scan of study models

Abstract

Objective: To compare the measured values obtained from the plaster model, digital models created by scanning the plaster models and direct intraoral scanning with the values obtained from direct intraoral measurements. Design: This was a prospective clinical study. Setting: The study was conducted in Department of Orthodontics, Saveetha Dental College and Hospital, Tamil Nadu, India. Participants: Ten patients before the start of orthodontic treatment were selected for the study. Methods: A computer-aided design and manufacturing (CAD-CAM) system is an advanced technology that is being adopted in the field of orthodontics for diagnosis, treatment planning and documentation of patient records. Mesiodistal tooth width measurements of first premolars, canines, lateral incisors and central incisors, and transverse width measurement from mesial pit of right first premolar to mesial pit of left first premolar in both maxilla and mandible were obtained from direct intraoral measurement (gold standard), study model obtained from alginate impression, intraoral scanned image, and desktop scanned image of the study model. Descriptive statistics and ANOVA was performed to find the difference in mean among the groups. Results: A P value > 0.05 was obtained in ANOVA indicating that there is no statistically significant difference in the measurements obtained by either of the methods. Conclusion: Conventional stone models and digital models obtained from intraoral scan and desktop scanning of plaster models are clinically reliable as the variations in measurements obtained from these methods were clinically negligible.

Evaluation of interproximal reduction in individual teeth, and full arch assessment in clear aligner therapy: digital planning versus 3D model analysis after reduction

“…The accuracy of the calibrated digital model measuring tool of the Ortho Analyzer software has been investigated, and its reliability and precision were confirmed [ 33 ]. More recently, intraoral direct measurements taken in individuals’ oral cavity with a 0.01-mm accuracy digital caliper were compared to measurements using the 3 Shape Ortho Analyzer cross-sectional tool; results indicated that these measurements are accurate replica and as reliable as direct measurements [ 34 ].…”

Contour Changes Following Immediate Placement of Ultra-Wide Implants in Molar Extraction Sockets without Bone Grafting

“…A better approach would have been to make digital impressions, but an intra-oral scanner wasn't available in the practice at the time of the study. The direct digitization of the dentition by means of an intra-oral scanner is at least as accurate as the indirect digitization of gypsum study casts using a lab scanner [66,67]. The use of an intra-oral scanner could have improved the precision and would have simplified the protocol [68,69].…”

A study to estimate tooth size discrepancy values specific to Saudi orthodontic patients: A systematic review and meta-analysis

“…Tooth size measurements were performed directly on dental casts using digital calipers, except for ( Alshahrani et al, 2020 ) and ( Al Sulaimani and Afify, 2006 ), who scanned the models and performed measurements using a computer software. Both measurement methods have been tested for accuracy by many authors, who reported no significant difference between the two methods ( Abuhassan and Asiry, 2021 , Amuk et al, 2019 , Murugesan and Sivakumar, 2020 ).…”