Abstract
ObjectiveThe aim of this study was to assess the dentoskeletal effects of Class II malocclusion treatment performed with the Twin Block appliance. MethodsThe experimental group comprised 20 individuals with initial mean age of 11.76 years and was treated for a period of 1.13 years. The control group comprised 25 individuals with initial mean age of 11.39 years and a follow-up period of 1.07 years. Lateral cephalograms were taken at treatment onset and completion to assess treatment outcomes. Intergroup comparison was performed by means of the chi-square and independent t tests. ResultsThe Twin Block appliance did not show significant effects on the maxillary component. The mandibular component showed a statistically significant increase in the effective mandibular length (Co-Gn) and significant improvement in the maxillomandibular relationship. The maxillary and mandibular dentoalveolar components presented a significant inclination of anterior teeth in both arches. The maxillary incisors were lingually tipped and retruded, while the mandibular incisors were labially tipped and protruded. ConclusionsThe Twin Block appliance has great effectiveness for correction of skeletal Class II malocclusion in individuals with growth potential. Most changes are of dentoalveolar nature with a large component of tooth inclination associated with a significant skeletal effect on the mandible.
Highlights
ObjectiveThe aim of this study was to assess the dentoskeletal effects of Class II malocclusion treatment performed with the Twin Block appliance
This study prospectively assessed the dentoskeletal effects of the Twin Block appliance for treatment of the Class II malocclusion
The experimental group comprised 20 individuals, 11 males and 9 females, with initial mean age of 11.76 ± 1.64 years presenting Class II division 1 malocclusion at treatment onset and who were treated with the modified Twin Block functional orthopedic appliance
Summary
The aim of this study was to assess the dentoskeletal effects of Class II malocclusion treatment performed with the Twin Block appliance. Conclusions: The Twin Block appliance has great effectiveness for correction of skeletal Class II malocclusion in individuals with growth potential. Most of the aforementioned results have been obtained from retrospective studies, and a relatively small number of studies which aimed at assessing dentoskeletal changes were considered as prospective.[9,10,11,12] this study prospectively assessed the dentoskeletal effects of the Twin Block appliance for treatment of the Class II malocclusion
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