Three-dimensional evaluation of maxillary dentoalveolar changes and airway space after distalization in adults

• Main Authors: Bayome, M. (Author), Hong, M. (Author), Kim, S. (Author), Kim, Y. (Author), Kook, Y.-A (Author), Lee, Y.-J (Author), Park, J.H (Author)
• Format: Article
• Language: English
• Published: Allen Press Inc. 2018
• Subjects: Airway space; alveolar bone; Alveolar Process; CBCT; cone beam computed tomography; Cone-Beam Computed Tomography; diagnostic imaging; Distalization; female; Female; human; Humans; Imaging, Three-Dimensional; male; Male; malocclusion; Malocclusion, Angle Class II; maxilla; Maxilla; Modified C-palatal plate; Molar; molar tooth; mouth; Mouth; orthodontic anchorage; Orthodontic Anchorage Procedures; orthodontic tooth movement; pathology; pharynx; Pharynx; procedures; Radiography, Dental; three dimensional imaging; tooth extraction; Tooth Extraction; Tooth Movement Techniques; tooth radiography; young adult; Young Adult
• Online Access: View Fulltext in Publisher

 Objectives: To evaluate the changes in position of the maxillary dentition and the airway space after distalization using a modified C-palatal plate (MCPP) in adult patients through CBCT images and to analyze the relationship between the amount of distalization and the changes in the airway space. Materials and Methods: CBCT images of 33 adult Class II patients (22.2 6 4.0 years old; 27 women and 6 men) treated by total maxillary arch distalization using the MCPP were evaluated before and after distalization. The patients were divided into nonextraction and extraction groups. The changes in the airway space as well as the changes in the positions of the maxillary dentition were evaluated. The distalization effects were calculated and assessed using paired t-tests. Results: After distalization, the first molar showed significant distalization and intrusion (P, .001) with no significant rotation of the crown and no significant buccal displacement of its root in the transverse dimension. There were no significant changes in the airway volume or the minimum cross-sectional area of the oropharynx. Conclusions: The application of the MCPP resulted in significant total arch distalization without a significant effect on the transverse dimensions or changes in the oropharynx airway space. The MCPP can be considered a viable treatment option for patients with Class II malocclusion. © 2018 by The EH Angle Education and Research Foundation, Inc.