Two different applications of Class II elastics with nonextraction segmental techniques.
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.


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.
Uzel
Aslihan
A
Department of Orthodontics, Faculty of Dentistry, Cukurova University, Adana, Turkey. asliuzel@cu.edu.tr
Uzel
Ilter
I
Toroglu
M Serdar
MS
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D020724:Elastomers; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000295:instrumentation* / Q000379:methods*; D011446:Prospective Studies; D016896:Treatment Outcome
D020724:Elastomers