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Accuracy of bracket positions with a CAD/CAM indirect bonding system in posterior teeth with different cusp heights

Title
Accuracy of bracket positions with a CAD/CAM indirect bonding system in posterior teeth with different cusp heights
Authors
Kim, JiyeonChun, Youn-SicKim, Minji
Ewha Authors
전윤식김민지
SCOPUS Author ID
전윤식scopus; 김민지scopusscopus
Issue Date
2018
Journal Title
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
ISSN
0889-5406JCR Link

1097-6752JCR Link
Citation
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS vol. 153, no. 2, pp. 298 - 307
Publisher
MOSBY-ELSEVIER
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Introduction: Our objective was to evaluate the effect of cusp height of posterior teeth (first premolar, second premolar, first molar) on the accuracy of the computer-aided design and computer-aided manufacturing (CADCAM) indirect bonding system. Material: Five kinds of maxillary arch models, without attrition, were divided into 2 groups: control group (with 0.5mmof grinding) and experimental group (with the addition of 0.5mmof wax to the cusp tip). Rapid prototype models were printed for both groups. Transfer jigs of the individual tooth brackets were designed using a digital model. 3-dimensional program to evaluate the differences between the intended digital bracket position and actual bracket position after indirect bonding. The differences were measured in the linear (mesiodistal, buccolingual, vertical) and angular (angulation, rotation, torque) dimensions. The Wilcoxon signed rank test was used for statistical analyses; significance was defined as P < 0.05. Results: Both groups had similar frequencies of errors between the intended and actual bracket positions. The frequencies of vertical errors over 0.5 mm were 3.3% and 6.7% in the control and experimental groups, respectively. The frequencies of angulation, rotation, and torque errors over 1 degrees were 53.3%, 43.3%, and 60%, respectively, for the control group; and 60%, 60%, and 73.3%, respectively, for the experimental group. Conclusions: A difference in cusp height of maxillary posterior teeth did not produce a statistically significant difference in the linear and angular dimensions of bracket placement with the CAD/CAM indirect bonding system. However, given the tendency for a higher frequency in bracket placement errors in posterior teeth with larger cusp tips, cusp height should be considered when using a CAD/CAM indirect bonding system.
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DOI
10.1016/j.ajodo.2017.06.017
Appears in Collections:
의과대학 > 의학과 > Journal papers
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