Hope Christopher K, Wilson Michael
Department of Microbiology, Eastman Dental Institute for Oral Healthcare Sciences, University College London, UK.
Am J Dent. 2002 Nov;15 Spec No:7B-11B.
To compare the efficacy of interproximal plaque removal beyond the bristles by two electric toothbrushes, the new Sonicare Elite and Braun Oral-B 3D, in an in vitro model replicating the brushing of interproximal plaque as would occur in vivo.
Oral biofilms were grown, in vitro, in a constant-depth film fermenter on a hydroxyapatite (HA) disc substratum. Brushing experiments were conducted in a brushing machine representing the brushing of interproximal plaque between mandibular molars. The HA discs with oral biofilms were located a minimum of 1.6 mm away from the bristles. The efficacy of plaque removal was assessed by enumeration of the percentage of viable bacteria removed from the biofilms by 5 seconds of brushing with the brush motors either activated or inactivated.
In the activated state, both brushes removed a significantly higher percentage of plaque bacteria compared to the inactive brushes (Braun, P = 0.002; Sonicare, P = 0.005). The percentage of plaque bacteria removed by the Sonicare Elite (32.23%) beyond the bristles was significantly greater (P = 0.012) than that removed by the Braun Oral-B 3D (9.48%) in this model system.
在一个体外模型中比较两种电动牙刷（新型飞利浦声波震动牙刷精英版和博朗欧乐 - B 3D）在模拟体内邻面菌斑刷牙情况时，刷毛外邻面菌斑清除的效果。
在体外，于羟基磷灰石（HA）圆盘基质上的恒深膜发酵器中培养口腔生物膜。在一台模拟下颌磨牙间邻面菌斑刷牙的刷牙机中进行刷牙实验。带有口腔生物膜的HA圆盘距离刷毛至少1.6毫米。通过计算在刷电机激活或未激活状态下刷牙5秒后从生物膜中去除的活菌百分比来评估菌斑清除效果。
在激活状态下，与未激活的牙刷相比，两种牙刷去除的菌斑细菌百分比均显著更高（博朗，P = 0.002；飞利浦，P = 0.005）。在此模型系统中，飞利浦声波震动牙刷精英版在刷毛外去除的菌斑细菌百分比（32.23%）显著高于（P = 0.012）博朗欧乐 - B 3D（9.48%）。
