Department of Diagnosis and Surgery, São Paulo State University, Araraquara, São Paulo, Brazil.
Am J Orthod Dentofacial Orthop. 2010 Feb;137(2):229-35. doi: 10.1016/j.ajodo.2008.03.032.
Orthodontic appliances hinder mechanical plaque control. In this study, we evaluated the effect of self-performed supragingival plaque removal with ultrasonic, electric, and manual toothbrushes on subgingival plaque composition in orthodontically banded molars.
Twenty-one patients wearing fixed orthodontic appliances were assigned to this single-blind crossover study. Samples of subgingival plaque were collected from banded molars, before and after each toothbrush usage period, for quantification of 22 bacterial species by the checkerboard DNA-DNA hybridization method. For each crossover, patients used a toothbrush for 30 days, followed by a washout period of 14 days.
The prevalence of Tannerella forsythia decreased significantly after a month of electric brush usage. In the manual brush group, the prevalences of Selenomonas noxia, Streptococcus sanguinis, and Prevotella melaninogenica also decreased significantly. However, there were no significant differences in the prevalences and levels of bacteria after usage of the ultrasonic brush. Intergroup comparisons showed no statistical differences among the 3 brushes for the microbiologic parameters.
All 3 brushes generally reduced bacterial prevalences, and, although electric and manual toothbrushes showed some isolated significant variations, we found no superiority with any toothbrush type when used three times daily for 2 minutes on microbiologic parameters in orthodontically banded molars.
正畸矫治器会妨碍机械性菌斑控制。本研究旨在评估使用超声、电动和手动牙刷自行进行龈上洁治对正畸带环磨牙龈下菌斑组成的影响。
本单盲交叉研究纳入了 21 名佩戴固定正畸矫治器的患者。在使用每种牙刷后的 30 天内，使用棋盘式 DNA-DNA 杂交法对龈下菌斑样本中的 22 种细菌进行定量分析。在每个交叉试验中，患者使用牙刷 30 天，然后进行 14 天的洗脱期。
电动牙刷使用一个月后，福赛拟杆菌的检出率明显下降。在手动牙刷组中，中间普氏菌、血链球菌和产黑色素普氏菌的检出率也明显下降。然而，使用超声牙刷后，细菌的检出率和水平没有显著差异。组间比较显示，三种牙刷在微生物学参数方面均无统计学差异。
所有三种牙刷均可普遍降低细菌检出率。虽然电动牙刷和手动牙刷在一些孤立的参数上显示出了一些显著的差异，但我们发现，在正畸带环磨牙上，每天使用三种牙刷三次，每次两分钟，在微生物学参数方面，任何一种牙刷类型都没有优势。
