Potiguar University, Natal, RN, Brazil.
Braz Oral Res. 2012 Jul-Aug;26(4):360-5. doi: 10.1590/s1806-83242012000400013.
The objective of this study was to compare the effectiveness of two manual toothbrushes (conventional and orthodontic). The following clinical parameters were used: VPI (visible plaque index) and GBI (gingival bleeding index). Patients, 64 total (30 males and 34 females), in the permanent dentition, with a mean age of 17.8 years, were randomly selected from a practice specializing in orthodontics. Each participant received audio-visual instructions on oral hygiene as well as a kit of materials containing two manual toothbrushes (orthodontic and conventional). Each toothbrush was randomly allocated to one side of the mouth (split-mouth design) and used for a period of approximately 4 weeks. The VPI and GBI were measured by a single calibrated examiner before (T0) and after (T1) the implementation of interventions. The Mann-Whitney test was used to compare the VPI values between the groups, and the Student t-test for independent samples was used to compare GBI values. The level of significance was set at 5%. No statistically significant difference was observed between the groups at T0 for both VPI and GBI, and at T1 for the GBI. The manual orthodontic toothbrush produced a statistically lower VPI (P < 0.05) at T1, but this did not seem to be of clinical importance.
本研究旨在比较两种手动牙刷（普通型和正畸型）的效果。使用以下临床参数：VPI（可见菌斑指数）和 GBI（牙龈出血指数）。从专门从事正畸的诊所中随机选择了 64 名恒牙患者（30 名男性和 34 名女性），平均年龄为 17.8 岁。每位参与者都接受了口腔卫生的视听指导以及包含两支手动牙刷（正畸型和普通型）的材料包。每支牙刷都随机分配到口腔的一侧（分侧设计），使用约 4 周。在实施干预措施之前（T0）和之后（T1），由一位经过校准的检查者测量 VPI 和 GBI。使用曼-惠特尼检验比较组间 VPI 值，使用独立样本 t 检验比较 GBI 值。显著性水平设为 5%。在 T0 时，两组的 VPI 和 GBI 均无统计学差异，而在 T1 时，GBI 也无统计学差异。在 T1 时，正畸型手动牙刷的 VPI 明显降低（P < 0.05），但这似乎没有临床意义。
