<abstract xmlns="http://www.w3.org/1999/xhtml"><sec><h3>Objectives</h3><p>The aim of the present study was to evaluate the dentoskeletal and airway effects of three different functional appliances (Frankel-2, Trainer and X-Bow) in prepubertal Class II division 1 patients.</p></sec><sec><h3>Methods</h3><p>The sample consisted of 54 patients with a Class II relationship as a result of mandibular retrognathia and relative maxillary constriction. Group I included 15 patients treated with a Frankel-2 appliance. Group II consisted of 14 patients treated with a T4-K Trainer. Group III consisted of 15 patients treated with the X-Bow appliance. Group IV consisted of 10 untreated Class II patients who served as a control group. Pretreatment (T1) and post-treatment (T2) cephalograms were used to evaluate dentoskeletal and airway changes. Parametric one-way variance analysis (ANOVA) and a paired <italic>t</italic>-test were used to perform statistical analysis.</p></sec><sec><h3>Results</h3><p>The decrease in SNA angle was significant in groups I and III, compared with the control group (<italic>p</italic> &lt; 0.05). SNB angle and Co-GN length changes from T1 to T2 were statistically significant in groups I and II (<italic>p</italic> &lt; 0.05), but not relative to the control group. The upper and lower incisors were significantly retruded and protruded, respectively, in all treatment groups (<italic>p</italic> &lt; 0.05). Except PNS-AD2 and MAS measurements in group I, nasopharyngeal and oropharyngeal airway dimensions did not significantly change from T1 to T2 in all groups.</p></sec><sec><h3>Conclusions</h3><p>The Frankel-2 and X-Bow appliances were efficient in restricting the forward growth of the maxilla. The Frankel-2 and Trainer appliances produced a larger sagittal increase in mandibular length than the X-Bow appliance. Lower incisor proclination was more pronounced in the X-Bow group. The effect of the treatment protocols was similar and matched the control group with respect to the airway.</p></sec></abstract>

ObjectivesThe aim of the present study was to evaluate the dentoskeletal and airway effects of three different functional appliances (Frankel-2, Trainer and X-Bow) in prepubertal Class II division 1 patients.MethodsThe sample consisted of 54 patients with a Class II relationship as a result of mandibular retrognathia and relative maxillary constriction. Group I included 15 patients treated with a Frankel-2 appliance. Group II consisted of 14 patients treated with a T4-K Trainer. Group III consisted of 15 patients treated with the X-Bow appliance. Group IV consisted of 10 untreated Class II patients who served as a control group. Pretreatment (T1) and post-treatment (T2) cephalograms were used to evaluate dentoskeletal and airway changes. Parametric one-way variance analysis (ANOVA) and a paired t-test were used to perform statistical analysis.ResultsThe decrease in SNA angle was significant in groups I and III, compared with the control group (p < 0.05). SNB angle and Co-GN length changes from T1 to T2 were statistically significant in groups I and II (p < 0.05), but not relative to the control group. The upper and lower incisors were significantly retruded and protruded, respectively, in all treatment groups (p < 0.05). Except PNS-AD2 and MAS measurements in group I, nasopharyngeal and oropharyngeal airway dimensions did not significantly change from T1 to T2 in all groups.ConclusionsThe Frankel-2 and X-Bow appliances were efficient in restricting the forward growth of the maxilla. The Frankel-2 and Trainer appliances produced a larger sagittal increase in mandibular length than the X-Bow appliance. Lower incisor proclination was more pronounced in the X-Bow group. The effect of the treatment protocols was similar and matched the control group with respect to the airway.

Dentoskeletal and airway effects of the X-Bow applian ce versus removable functional appliances (Frankel-2 and Trainer) in prepubertal Class II division 1 malocclusion patients

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

ObjectivesThe aim of the present study was to evaluate the dentoskeletal and airway effects of three different functional appliances (Frankel-2, Trainer and...

Dentoskeletal and airway effects of the X-Bow applian ce versus removable functional appliances (Frankel-2 and Trainer) in prepubertal Class II division 1 malocclusion patients

Published Online: Jul 30, 2021

Page range: 3 - 13

Received: Jan 01, 2016

Accepted: Sep 01, 2016

DOI: https://doi.org/10.21307/aoj-2020-079

© 2017 Ezgi Atik et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.