Barnes C M, Weatherford T W, Menaker L
University of Alabama School of Dentistry, Birmingham.
J Clin Dent. 1993;4(2):48-51.
This three-month clinical trial was designed to compare the effect of an electric and a manual toothbrush on reducing primarily gingivitis and secondarily, plaque, in a cohort of 70 healthy adults. After baseline evaluation of gingivitis, soft tissue trauma, and plaque, patients were randomly assigned to one of the two experimental groups, shown an instructional tooth brushing videotape, and had their teeth cleaned. Soft tissue trauma was again scored at 2 weeks. At 12 weeks all three clinical parameters were again evaluated. The results showed statistically significant reductions (baseline vs. 3-month) in both whole mouth (p = 0.003) and interproximal (p = 0.008) gingivitis scores for the electric toothbrush group. No significant reduction at three months compared to baseline was seen for the manual brush group. When gingivitis reductions were compared over the three-month test period, the electric brush was significantly better than the manual toothbrush in both whole mouth (p = 0.0007) and interproximal (p = 0.002) gingivitis reduction. No increase in soft tissue trauma and no significant differences in plaque reductions were seen for either toothbrush.
这项为期三个月的临床试验旨在比较电动牙刷和手动牙刷对70名健康成年人减少原发性牙龈炎以及继发性牙菌斑的效果。在对牙龈炎、软组织损伤和牙菌斑进行基线评估后,患者被随机分配到两个实验组之一,观看刷牙教学录像带,并进行牙齿清洁。在2周时再次对软组织损伤进行评分。在12周时再次评估所有三个临床参数。结果显示,电动牙刷组全口(p = 0.003)和邻面(p = 0.008)牙龈炎评分在统计学上有显著降低(基线与3个月时相比)。手动牙刷组在三个月时与基线相比未见显著降低。在三个月的测试期内比较牙龈炎减少情况时,电动牙刷在全口(p = 0.0007)和邻面(p = 0.002)牙龈炎减少方面均明显优于手动牙刷。两种牙刷均未出现软组织损伤增加,牙菌斑减少也无显著差异。