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KMID : 0361920170470060375
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Korean Journal of Orthodontics
2017 Volume.47 No. 6 p.375 ~ p.383
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Comparison of treatment effects between the modified C-palatal plate and cervical pull headgear for total arch distalization in adults
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Park Chong-Ook
Sa’aed Noor Laith
Bayome Mohamed
Park Jae-Hyun
Kook Yoon-Ah
Park Young-Seok
Hanh Seong-Ho
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Abstract
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Objective: The purpose of this study was to evaluate the dental and skeletaleffects of the modified C-palatal plate (MCPP) for total arch distalizationin adult patients with Class II malocclusion and compare the findings withthose of cervical pull headgear.
Methods: The study sample consisted of thelateral cephalograms of 44 adult patients with Class II Division 1 malocclusion,including 22 who received treatment with MCPP (age, 24.7 ± 7.7 years) and22 who received treatment with cervical pull headgear (age, 23.0 ± 7.7 years).Pre- (T1) and post-treatment (T2) cephalograms were analyzed for 24 linearand angular measurements. Multivariate analysis of variance was performed toevaluate the changes after treatment in each group and differences in treatmenteffects between the two groups.
Results: The mean amount of distalization atthe crown and root levels of the maxillary first molar and the amount of distaltipping was 4.2 mm, 3.5 mm, and 3.9o in the MCPP group, and 2.3 mm, 0.6mm, and 8.6o in the headgear group, respectively. In addition, intrusion by 2.5mm was observed in the MCPP group. In both groups, the distal movementof the upper lip and the increase in the nasolabial angle were statisticallysignificant (p < 0.001). However, none of the skeletal and soft tissue variablesexhibited significant differences between the two groups.
Conclusions: Theresults of this study suggest that MCPP is an effective treatment modality fortotal arch distalization in adults.
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KEYWORD
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Class II, Headgear, Orthodontic implant, Palatal plate
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