Abstract
BackgroundThe purpose of this study was to evaluate the treatment effectiveness of Carriere Distalizer in comparison to Class II intermaxillary elastics and Forsus.MethodsThree groups of patients treated with Class II intermaxillary elastics (n = 18), Carriere Distalizer (n = 18), and Forsus appliance (n = 18) were collected from three private orthodontic practices. Inclusion criteria were as follows: (1) 10–14 years old of start age with permanent dentition, (2) no history of previous orthodontic treatment, (3) complete pre- and post-treatment records, (4) dental Class II division 1 (end-to-end or more), (5) no pre-treatment transverse discrepancy, (6) non-extraction treatment plan, and (7) Class I post-treatment occlusal relationship. The data consisted of cephalometric and study model measurements from pre- and post-treatment records and treatment time. Two-tail Student t test was used to analyze the differences in cephalometric changes and dental corrections between Carriere Distalizer group and Class II elastics/Forsus group.ResultsAll three groups of patients showed no differences in the age of treatment initiation, pre-treatment cephalometric measurements and discrepancy index (DI). The time of Class II correction for Carriere Distalizer was significantly shorter than that for Class II elastics; there was no difference in the length of Class II correction between Carriere Distalizer and Forsus groups. The amount of Class II correction (canine/molar relationship) was significantly lower for Carriere Distalizer when compared with Forsus appliance. Carriere Distalizer, similarly to Class II elastics, did not induce any statistically significant correction in skeletal component (ANB and Wits appraisal).ConclusionsThere is no clinically significant skeletal correction induced by Carriere Distalizer in growing patients. Carriere Distalizer can be applied to treatment of mild to moderate Class II dental malocclusion over 6 months on average, although the total treatment time may be prolonged due to various side effects. Overall, the Carriere Distalizer appears to be no more effective or efficient than alternatives in the treatment of Class II malocclusion.
Highlights
The purpose of this study was to evaluate the treatment effectiveness of Carriere Distalizer in comparison to Class II intermaxillary elastics and Forsus
The 78 patients were allocated into the three corresponding groups: (1) Class II intermaxillary elastics, (2) Carriere Distalizer, and (3) Forsus appliance
Total treatment time and time for elastics/appliance use Based on the subjects collected for the study, the length of treatment with Carriere Distalizer as the Class II corrector was 32.3 ± 8.4 months
Summary
Treatment of Class II malocclusion is a common challenge that orthodontists encounter on a daily basis. Class II division I malocclusion caused by mandibular deficiency and/or maxillary excess is characterized by distally positioned lower molars relative to the upper molars, and protrusive appearance of upper incisors [1]. Patients with Class II division 1 often exhibit convex facial profile, recessed chin, everted lower lip, and short chin-to-neck length. These dental and soft tissue features can pose negative influences on affected children both functionally and emotionally. The prevalence of Class II division 1 malocclusion varies from 8.6% to 33.7% in the US population [2, 3]. Many different treatment modalities exist for Class II malocclusion depending on whether the problem is skeletal or dentoalveolar
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