Accuracy of 3-dimensional curvilinear measurements on digital models with intraoral scanners
| Autor: | Spencer Mack, Tammy Bonilla, Jeryl D. English, Benjamin E. Cozad, Sercan Akyalcin |
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| Rok vydání: | 2017 |
| Předmět: |
Dental Impression Technique
Orthodontics Mandible 01 natural sciences 010104 statistics & probability 03 medical and health sciences Dental Arch Imaging Three-Dimensional 0302 clinical medicine Linear regression Image Processing Computer-Assisted medicine Humans 0101 mathematics Mathematics Curvilinear coordinates Mandibular teeth Reproducibility of Results Dental Models 030206 dentistry Models Dental Dental arch medicine.anatomical_structure Random error Calipers Tooth Algorithms |
| Zdroj: | American Journal of Orthodontics and Dentofacial Orthopedics. 152:420-425 |
| ISSN: | 0889-5406 |
| Popis: | Introduction Our objectives were to evaluate and compare the digital dental models generated from 2 commercial intraoral scanners with manual measurements when performing 3-dimensional surface measurements along a curved line (curvilinear). Methods Dry mandibles (n = 61) with intact dentition were used. The mandibles were digitized using 2 chair-side intraoral scanners: Cadent iTero (Align Technology, San Jose, Calif) and Lythos Digital Impression system (Ormco, Orange, Calif). Digitized 3-dimensional models were converted to individual stereolithography files and used with commercial software to obtain the curvilinear measurements. Manual measurements were carried out directly on the mandibular teeth. Measurements were made on different locations on the dental arch in various directions. One-sample t tests and linear regression analyses were performed. To further graphically examine the accuracy between the different methods, Bland-Altman plots were computed. The level of significance was set at P Results There were no significant differences between any of the paired methods; this indicated a certain level of agreement between the methods tested (P >0.05). Bland-Altman analysis showed no fixed bias of 1 approach vs the other, and random errors were detected in all comparisons. Although the mean biases of the digital models obtained by the iTero and Lythos scanners, when compared with direct caliper measurements, were low, the comparison of the 2 intraoral scanners yielded the lowest mean bias. No comparison displayed statistical significance for the t scores; this indicated the absence of proportional bias in these comparisons. Conclusions The intraoral scanners tested in this study produced digital dental models that were comparatively accurate when performing direct surface measurements along a curved line in 3 dimensions. |
| Databáze: | OpenAIRE |
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