Dental and skeletal effects after total arch distalization using modified Cpalatal plate on hypo- And hyperdivergent Class II malocclusions in adolescents
Document Type
Article
Publication Title
Angle Orthodontist
Abstract
Objectives: To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. Materials and Methods: The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 6 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. Results: The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.28 crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. Conclusions: The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.
First Page
22
Last Page
29
DOI
10.2319/031720-188.1
Publication Date
1-1-2021
Recommended Citation
Jung, Chang Yoon; Park, Jae Hyun; Ku, Ja Hyeong; Lee, Nam Ki; Kim, Yoonji; and Kook, Yoon Ah, "Dental and skeletal effects after total arch distalization using modified Cpalatal plate on hypo- And hyperdivergent Class II malocclusions in adolescents" (2021). ASDOH Faculty Publications. 91.
https://scholarworks.atsu.edu/asdoh-faculty/91