Treatment effects of mandibular total arch distalization using a ramal plate.
10.4041/kjod.2016.46.4.212
- Author:
Jonghan YU
1
;
Jae Hyun PARK
;
Mohamed BAYOME
;
Sungkon KIM
;
Yoon Ah KOOK
;
Yoonji KIM
;
Chang Hyen KIM
Author Information
1. Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Distalizing;
Miniplate;
Class III treatment;
Total arch distalization;
Cephalometrics
- MeSH:
Adult;
Crowns;
Dentition;
Female;
Humans;
Lip;
Male;
Molar;
Orthognathic Surgery
- From:The Korean Journal of Orthodontics
2016;46(4):212-219
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: The purpose of this study was to evaluate treatment effects after distalization of the mandibular dentition using ramal plates through lateral cephalograms. METHODS: Pre- and post-treatment lateral cephalograms and dental casts of 22 adult patients (11 males and 11 females; mean age, 23.9 ± 5.52 years) who received ramal plates for mandibular molar distalization were analyzed. The treatment effects and amount of distalization of the mandibular molars were calculated and tested for statistical significance. The significance level was set at p < 0.001. RESULTS: The mandibular first molar distalization at the crown and root were 2.10 mm (p < 0.001) and 0.81 mm (p = 0.011), respectively. In the evaluation of skeletal variables, there was a significant increase in the Wits appraisal (p < 0.001). In the evaluation of the soft tissue, there was no significant effect on upper lip position, but the lower lips showed a significant retraction of 2.2 mm (p < 0.001). CONCLUSIONS: The mandibular molars showed a significant amount of distalization accompanied by limited extrusion and mesiobuccal rotation of the crowns. A ramal plate may be a viable device for mandibular total arch distalization in Class III patients who are reluctant to undergo orthognathic surgery.
