Treatment effects of mandibular total arch distalization using a ramal plate
유종한, 박재현, Bayome Mohamed, 김성곤, 국윤아, 김윤지, 김창현,
소속 상세정보
유종한 ( Yu Jong-Han ) - Catholic University Graduate School of Clinical Dental Science Department of Orthodontics
박재현 ( Park Jae-Hyun ) - Kyung Hee University Graduate School of Dentistry
( Bayome Mohamed ) - Catholic University Graduate School Department of Dentistry
김성곤 ( Kim Sung-Kon ) - Catholic University College of Medicine Department of Orthodontics
국윤아 ( Kook Yoon-Ah ) - Catholic University College of Medicine Department of Orthodontics
김윤지 ( Kim Yoon-Ji ) - Catholic University College of Medicine Department of Orthodontics
김창현 ( Kim Chang-Hyen ) - Catholic University Seoul St. Mary’s Hospital Department of Oral and Maxillofacial Surgery
KMID : 0361920160460040212
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.
키워드
Distalizing; Miniplate; Class III treatment; Total arch distalization; Cephalometrics
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