Abstract
The orthodontic removable traction appliance (ORTA) was introduced as an intraoral removable appliance to treat Class III patients, but the pure treatment effects of ORTA have not been established yet. The aim of the study was to evaluate the skeletal, dental and soft tissue changes following the use of ORTA in treating Class III growing patients, and to compare these changes with those observed in an untreated control group (UCG). Forty-two patients with Class III malocclusion (mean age: 9.04 ±0.84 years) were randomly allocated to either the intervention group (ORTA) or UCG with a 1:1 allocation ratio. The patients in the ORTA group were treated until a positive overjet was achieved, whereas those in UCG were observed for an average of 6 months. Lateral cephalograms were obtained before (T1) and at the end of the treatment or observation period (T2). Twenty-six variables were used to evaluate treatment changes. The paired and independent t tests were used to detect significant differences within and between the groups, respectively. Forty-two patients who met the inclusion criteria were included primarily. Two patients in UCG dropped out of the study. Therefore, 40 patients were included in the statistical analyses (ORTA: 21; UCG: 19). The orthodontic removable traction appliance was able to correct Class III malocclusion in a mean treatment time of 4.34 ±2.02 months. The maxilla moved forward by a mean of 1.31°, which was significantly greater than in the case of UCG (i.e., a mean difference of 1.02°). The mandible moved significantly backward in the ORTA group (the mean change in SNB: -1.85°) and significantly forward in UCG (the mean change in SNB: 0.97°), leaving the overall sagittal skeletal change significantly greater in the ORTA group as compared to UCG (the mean change in ANB: 3.81°) (p < 0.001). In the short term, ORTA seemed to be an effective intraoral removable appliance in the treatment of growing Class III patients.
Highlights
Skeletal Class III malocclusion is considered one of the most difficult orthodontic problems to treat.[1]
The aim of the study was to evaluate the skeletal, dental and soft tissue changes following the use of orthodontic removable traction appliance (ORTA) in treating Class III growing patients, and to compare these changes with those observed in an untreated control group (UCG)
40 patients were included in the statistical analyses (ORTA: 21; UCG: 19)
Summary
Skeletal Class III malocclusion is considered one of the most difficult orthodontic problems to treat.[1]. This con dition of malocclusion can result from a wide spectrum of skeletal and dental abnormalities.[2]. The early treatment of Class III malocclusion in growing patients is a matter exceedingly discussed in the literature.[3]. Several studies have recommended early interven tion in the case of developing Class III malocclusion to reduce the need for or the complexity of the 2nd phase of treatment,[4] and to reduce the need for an orthogna thic surgery at late adolescence.[5]. The orthodontic removable traction appliance (ORTA) was introduced as an intraoral removable appliance to treat Class III patients, but the pure treatment effects of ORTA have not been established yet
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
