Long term dental transversal stability of Class II division 1 treated with cervical headgear

Márcio Bastos de Oliveira, Jean Nunes dos Santos, Vanessa Mascarenhas Lima, Tiago Fonseca Lima da Fonte, Telma Martins de Araujo, Carlos Jorge Vogel, Emanuel Braga Rêgo

Introduction: In several conditions, outcome stability is a great challenge for Orthodontics. Previous studies have reported that relapse commonly occurs along the years after orthodontic treatment finishing. Objective: The aim of the present study was to evaluate in the longterm transversal dental arch changes of Class II division 1 patients treated with cervical headgear and fixed appliance. Methods: Plaster study casts of 20 patients treated with cervical headgear without dental extractions were 3D-scanned and evaluated in three distinct times: initial (T1 ), immediate post-treatment (T2 ) and long-term retention (T3 - minimum 20 years). Transversal teeth distance of maxillary and mandibular canines, premolars and first molars were measured. Results: A statistically significant increase during treatment was observed for all maxillary teeth transversal distances (p < 0.05). In turn, a significant reduction was observed in the long term (p < 0.05). For the mandibular teeth, canine transversal distance presented statistically significant constriction in the retention period (p < 0.05). Mandibular first molars distance was significantly expanded by treatment (p <0.05) and remained stable in the long term. The changes observed for the other teeth or other times were considered not statistically relevant. Conclusions: For the accessed sample, transversal changes occurred during treatment and retention phases in Class II division 1 patients treated with cervical headgear and fixed appliance. Relapse was considered statistically relevant, even with the institution of a retention protocol.

Keywords: Relapse. Angle Class II malocclusion. Orthodontic treatment. Stability.

How to cite: Oliveira MB, Santos JN, Lima VM, Fonte TFL, Araujo TM, Vogel CJ, Rêgo EB. Long term dental transversal stability of Class II division 1 treated with cervical headgear. Dental Press J Orthod. 2022;27(2):e2220291.

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