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Differences in molar relationships and occlusal contact areas evaluated from the buccal and lingual aspects using 3-dimensional digital models

Title
Differences in molar relationships and occlusal contact areas evaluated from the buccal and lingual aspects using 3-dimensional digital models
Authors
Jang S.-Y.Kim M.Chun Y.-S.
Ewha Authors
전윤식김민지
SCOPUS Author ID
전윤식scopus; 김민지scopus
Issue Date
2012
Journal Title
Korean Journal of Orthodontics
ISSN
1225-5610JCR Link
Citation
vol. 42, no. 4, pp. 182 - 189
Indexed
SCOPUS; KCI WOS scopus
Abstract
Objective: The aims of this study were to use a 3-dimensional (3D) system to compare molar relationship assessments performed from the buccal and lingual aspects, and to measure differences in occlusal contact areas between Class II and Class I molar relationships. Methods: Study casts (232 pairs from 232 subjects, yielding a total of 380 sides) were evaluated from both the buccal and lingual aspects, so that molar relationships could be classified according to the scheme devised by Liu and Melsen. Occlusal contact areas were quantified using 3D digital models, which were generated through surface scanning of the study casts. Results: A cusp-to-central fossa relationship was observed from the lingual aspect in the majority of cases classified from the buccal aspect as Class I (89.6%) or mild Class II (86.7%). However, severe Class II cases had lingual cusp-to-mesial triangular fossa or marginal ridge relationships. Mean occlusal contact areas were similar in the Class I and mild Class II groups, while the severe Class II group had significantly lower values than either of the other 2 groups (p < 0.05). Conclusions: Buccal and lingual assessments of molar relationships were not always consistent. Occlusal contact areas were lowest for the Class II-severe group, which seems to have the worst molar relationships - especially as seen from the lingual aspect. © 2012 The Korean Association of Orthodontists.
DOI
10.4041/kjod.2012.42.4.182
Appears in Collections:
의과대학 > 의학과 > Journal papers
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