Stability of anterior open-bite treatment with occlusal adjustment

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• 作者：Guilherme Janson ; Marcus Vinicius Crepaldi ; Karina Maria Salvatore Freitas ; Marcos Roberto de Freitas ; Waldyr Janson
• 刊名：American Journal of Orthodontics and Dentofacial Orthopedics
• 出版年：2010
• 出版时间：July 2010
• 年：2010
• 卷：138
• 期：1
• 页码：14.e1-14.e7
• 全文大小：429 K

文摘

Introduction

In this study, we aimed to evaluate the long-term stability of anterior open-bite treatment with occlusal adjustment and the dentinal sensitivity caused by this procedure in the long term.

Methods

The sample comprised 17 open-bite patients who experienced relapse of the negative vertical overbite after orthodontic treatment and were retreated with occlusal adjustment. The cephalometric changes were evaluated on lateral cephalograms obtained before and after the occlusal adjustment and in the long term (mean, 3.4 years after occlusal adjustment). Dentinal sensitivity was also evaluated before the occlusal adjustment, and 1.35 months, 4.61 months, and 3.4 years later. The cephalometric statuses between the 3 evaluations were compared with analysis of variance (ANOVA) and Tukey tests. The percentages of clinically significant relapse were calculated. To compare dentinal sensitivity at the several stages, nonparametric Friedman and Wilcoxon tests were performed.

Results

Statistically significant relapse of anterior open bite occurred in 33.3 % of the patients. Those who had the procedure before 21 years of age were most likely to experience relapse. Dentinal sensitivity remained within the normal range in the long term.

Conclusions

Despite the statistically significant relapse of anterior open bite, clinically significant stability was found in 66.7 % of the patients.