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  • Title: Two different applications of Class II elastics with nonextraction segmental techniques.
    Author: Uzel A, Uzel I, Toroglu MS.
    Journal: Angle Orthod; 2007 Jul; 77(4):694-700. PubMed ID: 17605495.
    Abstract:
    OBJECTIVE: To evaluate the relative effects of Class II elastics applied directly with utility arches (UAs) or with the Reciprocal Mini-Chin Cup (RMCC) appliance. MATERIALS AND METHODS: Thirty patients with Class II division 1 malocclusion were included. Fifteen of them were treated with the RMCC appliance and the other 15 treated with Class II elastics on UAs. Lateral cephalograms of an additional 15 untreated persons having the same characteristics as the treatment groups were used as a control group. RESULTS: The mean control period was 10 months. Class I molar and canine relationships were achieved in a mean treatment time of 4.6 months with the RMCC appliance and in 8.5 months with the elastics on UAs. The amount of overjet reduction was 4.7 mm in the RMCC group (87.87% dental) and 5.2 mm in the UA group (80.76% dental). The molar correction was 4.5 mm in the RMCC group (87.36% dental) and 2.0 mm in the UA group (51.47% dental). The anterior lower facial height increased in both of the treatment groups. CONCLUSIONS: The RMCC appliance is a valuable alternative for Class II elastic use in Class II cases in which the upper molars need to be moved to the distal more than the upper incisors.
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