Effectiveness of The Motivational Interview in Patients with Orthodontics Appliances
Objectives: To evaluate the effectiveness of the motivational interview changing the oral hygiene at home in patients with fixed orthodontics appliances.
Methods: This single blind randomized clinical trial enrolled 45 beginning their orthodontic treatment with fixed metal brackets and a good periodontal heath. Twenty–five patients were randomly assigned to receive a Motivational Interview (MI) in conjunction with traditional oral hygiene instruction (TOHI), and twenty were assigned just to receive a conventional oral hygiene instruction monthly for 6 months. Also, a demographic questionnaire, simplified oral hygiene index, gingival index, pocket depths, bleeding on probing were assessed by a blind evaluator at baseline, Three months and six months. After that, the main values were obtained and the analysis of Kolmogorov – Smirnov was performed to analyze the normality in the distribution of the data and then Friedman and Mann-Whit analyzes to compare the groups within and among them.
Results: Of the 45 patients 33 were women and 12 men with a mean age of 26.5 (SD=8.2). Friedman’s nonparametric analysis showed that there was a statistically significant difference at 6 months in the group of patients who were given the motivational interview with a value of p = 0.004. After performing the Mann–Whitney U we were able to observe that there was a statistically significant difference between the groups at 6 months with a value of p = 0.032.
Conclusions: This study showed that at 6 months the motivational interview was effective to reduce the biofilm accumulation in patients with fixed orthodontics appliances.