Grossman E, Cronin M, Dembling W, Proskin H
NISCO, Northfield, NJ 08225, USA.
Am J Dent. 1996 Jul;9 Spec No:S25-9.
To evaluate the efficacy and safety of two oscillating/rotating toothbrushes, (Braun Oral-B Plaque Remover-D7 and Braun Oral-B Ultra Plaque Remover-D9) and a manual toothbrush with respect to removing extrinsic dental stain.
This randomized, three-way cross-over study investigated 24 subjects entering the trial, which was divided into three, 5-day periods. Over the first 4 days of the study, an intense chlorhexidine/tea rinsing regimen was employed to induce extrinsic tooth staining. On day 5, each subject was assessed for tooth stain; they then brushed for a total of 2 minutes with one of the three randomly allocated toothbrushes. Stain evaluations were repeated after 30 seconds, 1 and 2 minutes brushing, with the intensity of stain, area of stain and number of sites with < 10% stained tooth area, being recorded at each assessment.
Analysis of the results showed that the two electric toothbrushes were significantly better at removing stain than the manual toothbrush. In addition, the D9 was consistently more effective than the D7, with the difference with respect to stain area achieving statistical significance (P < 0.05) after 2 minute's brushing. All three brushes were found to be safe, and there was no evidence of any soft or hard tissue abrasion. It was concluded that the oscillating/rotating electric toothbrushes were more effective in removing extrinsic dental stain than a manual brush, and that compared with the D7, the newly designed Braun Oral-B Ultra Plaque Remover has an increased potential for stain removal.
评估两款振动/旋转式牙刷（博朗欧乐-B牙菌斑清除器-D7和博朗欧乐-B超效牙菌斑清除器-D9）以及一款手动牙刷在清除外源性牙渍方面的疗效和安全性。
这项随机、三向交叉研究对24名进入试验的受试者进行了调查，试验分为三个为期5天的阶段。在研究的前4天，采用强力洗必泰/茶漱口方案来诱导外源性牙齿染色。在第5天，对每位受试者的牙齿染色情况进行评估；然后他们用随机分配的三款牙刷之一总共刷牙2分钟。在刷牙30秒、1分钟和2分钟后重复进行染色评估，每次评估时记录染色强度、染色面积以及牙齿染色面积小于10%的部位数量。
结果分析表明，两款电动牙刷在清除牙渍方面明显优于手动牙刷。此外，D9始终比D7更有效，在刷牙2分钟后，染色面积方面的差异达到统计学显著性（P < 0.05）。发现所有三款牙刷都是安全的，没有任何软组织或硬组织磨损的迹象。得出的结论是，振动/旋转式电动牙刷在清除外源性牙渍方面比手动牙刷更有效，并且与D7相比，新设计的博朗欧乐-B超效牙菌斑清除器具有更强的清除牙渍潜力。
