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http://dx.doi.org/10.4041/kjod.2020.50.2.98

Posterior dental compensation and occlusal function in adults with different sagittal skeletal malocclusions  

Hwang, Soonshin (Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University)
Choi, Yoon Jeong (Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University)
Jung, Sooin (Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University)
Kim, Sujin (Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University)
Chung, Chooryung J. (Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University)
Kim, Kyung-Ho (Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University)
Publication Information
The korean journal of orthodontics / v.50, no.2, 2020 , pp. 98-107 More about this Journal
Abstract
Objective: The aim of this study was to compare posterior tooth inclinations, occlusal force, and contact area of adults with different sagittal malocclusions. Methods: Transverse skeletal parameters and posterior tooth inclinations were evaluated using cone beam computed tomography images, and occlusal force as well as contact area were assessed using pressure-sensitive films in 124 normodivergent adults. A linear mixed model was used to cluster posterior teeth into maxillary premolar, maxillary molar, mandibular premolar, and mandibular molar groups. Differences among Class I, II, and III groups were compared using an analysis of variance test and least significant difference post-hoc test. Correlations of posterior dental inclinations to occlusal function were analyzed using Pearson's correlation analysis. Results: In male subjects, maxillary premolars and molars had the smallest inclinations in the Class II group while maxillary molars had the greatest inclinations in the Class III group. In female subjects, maxillary molars had the smallest inclinations in the Class II group, while maxillary premolars and molars had the greatest inclinations in the Class III group. Occlusal force and contact area were not significantly different among Class I, II, and III groups. Conclusions: Premolar and molar inclinations showed compensatory inclinations to overcome anteroposterior skeletal discrepancy in the Class II and III groups; however, their occlusal force and contact area were similar to those of Class I group. In subjects with normodivergent facial patterns, although posterior tooth inclinations may vary, difference in occlusal function may be clinically insignificant in adults with Class I, II, and III malocclusions.
Keywords
Cone beam computed tomography; Occlusal force; Sagittal skeletal malocclusion;
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