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ID 117256
Author
Kawai, Nobuhiko Kanagawa Dental University|Tokushima University KAKEN Search Researchers
Watanabe, Masahiko Tokushima University
Shibata, Manami Tokushima University
Fushima, Kenji Kanagawa Dental University
Keywords
Surgical orthodontic treatment
Camouflage orthodontic treatment
Skeletal class III
Masticatory function
Wits appraisal
Content Type
Journal Article
Description
Background/purpose: Surgical orthodontic treatment is recommended for patients with severe dentoskeletal discrepancies, while camouflage orthodontic treatment is recommended for patients with mild to moderate discrepancies. However, the decision as to which treatment should be chosen is complicated. The purpose of this study was to determine differences in masticatory function in patients who underwent camouflage and surgical orthodontic treatment for skeletal Class III malocclusion, as well as the usefulness of Wits appraisal in treatment decision based on masticatory functional analysis.
Materials and methods: The study subjects were 45 patients with skeletal Class III malocclusion (15 cases with camouflage orthodontics and 30 cases with orthognatic surgery) and 12 individuals with normal occlusion. We analyzed the pre-treatment records of electromyographic activities of masseter and temporalis muscles and jaw movements.
Results: There were no significant differences in various functional measurements between the camouflage and surgery groups. However, there were significant but not strong correlations between ANB and both masseter muscle activity (r = 0.36, p < 0.01) and expression ratio of abnormal chewing (r = −0.54, p < 0.01). Division of patients into two groups using a cutoff value of −6.0 mm for Wits appraisal showed a significant difference in masseter muscle activity between −6.0 mm or less group and the control (p < 0.01) but none between more than −6.0 mm group and the control.
Conclusion: Camouflage orthodontic treatment is inappropriate for patients with relatively severe dentoskeletal discrepancies. Wits appraisal of −6.0 mm is a potentially useful parameter for treatment decision.
Journal Title
Journal of Dental Sciences
ISSN
19917902
NCID
AA12795373
Publisher
Association for Dental Sciences of the Republic of China|Elsevier
Volume
17
Issue
2
Start Page
822
End Page
830
Published Date
2021-10-14
Rights
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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DOI (Published Version)
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FullText File
language
eng
TextVersion
Publisher
departments
Oral Sciences
University Hospital