| Accuracy of inter-arch measurements performed on digital models generated using two types of intraoral scanners: Ex vivo study |
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Jo-Kwang Yoo1, Yoon-Koo Kang2, Su-Jung Lee3, Seong-Hun Kim4, Cheol-Hyun Moon5 |
1Department of Orthodontics, Gil Medical Center, Gachon University College of Medicine
2Department of Orthodontics, Gil Medical Center, Gachon University College of Medicine
3Department of Orthodontics, Gil Medical Center, Gachon University College of Medicine
4Department of Orthodontics, School of Dentistry, Kyung Hee University
5Department of Orthodontics, Gil Medical Center, Gachon University College of Medicine |
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| Abstract |
Objective
The purpose of this study was to evaluate the accuracy of the inter-arch relationship of digital models generated using two types of intraoral scanners. Methods: In total, 34 plaster model samples were used. Two corresponding digital models were created using two types of intraoral scanners. A total of 15 variables were measured. The plaster model was directly measured using a digital caliper, while the digital models were measured using a software. The accuracy of the measurements was evaluated using repeated measures analysis of variance and the Friedman test. Results: Among the 15 measurements, 6 measurements[Overjet, Overbite, DZ_11-41 (Distance between the gingival zenith of maxillary right central incisor and mandibular right central incisor), DZ_16-46 (Distance between the gingival zenith of maxillary right first molar and mandibular right first molar), DZ_13-33 (Distance between the gingival zenith of maxillary right canine and mandibular left canine), and DZ_23-43 (Distance between the gingival zenith of maxillary left canine and mandibular right canine)]showed statistically significant differences, with DZ_23-43 showing the largest difference of 0.18 mm. The other measurements showed no statistically significant differences. Conclusions: Regardless of the type of scanner used for preparation, digital models can be used as clinically acceptable alternatives to conventional plaster models. |
| Key Words:
Digital models;3D intraoral scanner;Inter-arch measurements; |
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