Long-term stability of maxillary anterior alignment in non-extraction cases

Luiz Filiphe Gonçalves CANUTO, Marcos Roberto de FREITAS, Karina Maria Salvatore de FREITAS, Rodrigo Hermont CANÇADO, Leniana Santos NEVES

Objective: The purpose of this retrospective study was to evaluate long-term stability of maxillary incisors alignment in cases submitted to non-extraction orthodontic treatment. Methods: The sample comprised 23 patients (13 female; 10 male) at a mean initial age of 13.36 years (SD = 1.81 years), treated with ixed appliances. Dental cast measurements were obtained at three diferent time points (T1 – pretreatment, T2 – posttreatment and T3 – long-term posttreatment). Variables assessed in maxillary arch were Little Irregularity Index, intercanine, interpremolar and intermolar widths, arch length and perimeter. The statistical analysis was performed by one-way ANOVA and Tukey tests when necessary. Pearson’ correlation coeicients were used to investigate possible associations between the variables evaluated. Results: There was no signiicant change in most arch dimension measurements during and ater treatment, however, during the long-term posttreatment period, it was observed a signiicant maxillary incisors crowding relapse. Conclusion: The maxillary incisors irregularity increased signiicantly (1.52 mm) during long-term posttreatment. None of the clinical factors studied demonstrated to be predictive of the maxillary crowding relapse.

Keywords: Relapse. Corrective orthodontics. Malocclusion.

How to cite: Canuto LFG, Freitas MR, Freitas KMS, Cançado RH, Neves LS. Long-term stability of maxillary anterior alignment in nonextraction cases. Dental Press J Orthod. 2013 May-June;18(3):46-53.

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