Dentoskeletal effects of Class II malocclusion treatment with the Twin Block appliance in a Brazilian sample: A prospective study

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.

Severe Class II Division 1 malocclusion in an adolescent patient, treated with a novel sagittal-guidance Twin-block appliance

“…3,5,[11][12][13][14][15] However, there are also some potential disadvantages that include proclination of the mandibular incisors and the development of posterior open bites. [16][17][18] In our patient, the cephalometric analysis indicated mandibular retrusive positioning, reduced lower facial height, flat mandibular plane, deep curve of Spee, flaring maxillary incisors, and severe overjet and overbite. Using the SGTB combined with a fixed appliance and microimplant anchorage devices, we achieved a favorable result and a good sagittal jaw relationship with the dentoalveolar changes.…”

Management of Severe Class II Division 1 Malocclusion with Hybrid Functional Appliance by Double Advancement – A Case Report

“…15,16 However, there are also some potential disadvantages that include proclination of the mandibular incisors and the development of posterior open bites. [17][18][19] Management of distal occlusion with functional appliances can lead to improvement in orofacial function through better muscle adaptation concurrent to the dental and skeletal changes achieved. Ideal timming for orthopaedic treatment for mandibular deficiency is after onset of pubertal growth spurt.…”

Atypical Extraction of Maxillary Central Incisor for the Correction of Angle Class II Malocclusion

“…Dental Class II malocclusion is one of the most prevalent orthodontic problems. This type of malocclusion may present different clinical features, such as protruded upper teeth, retruded lower teeth, or even a combination of both (Saikoski et al, 2014;Nagayama et al, 2015).…”