牙膏对牙齿表面润湿性影响的研究

Effect of toothpaste on the wettability of enamel surface

目的:研究比较佳洁士皓爽白牙膏、防蛀牙膏对离体牙釉质表面润湿性的影响。方法:选择近期拔除的切牙15个,在唇面磨出一个4×4 mm2的釉质平面,将牙齿试样分为3组,每组5个。对釉质表面进行各种处理,并用佳洁士皓爽白牙膏、防蛀牙膏刷牙,然后分别用蒸馏水、人工唾液和人唾液作为湿润液测定釉质表面接触角。结果:粗糙釉质表面的接触角小于光滑釉质;用皓爽白、防蛀牙膏刷牙均可显著降低液体在釉质表面的接触角;刷牙后,皓爽白牙膏降低唾液在光滑釉质表面接触角的效果优于防蛀牙膏。结论:含有多聚磷酸钠的佳洁士皓爽白牙膏在提高釉质表面润湿性方面优于一般防蛀牙膏,能明显提高刷牙者牙齿滑爽的程度。

AIM：To evaluate the effect of dentifrice （ Crest Whitening - containing polyphosphate, and Crest anti-cavity,P＆G Co. ）on wetting of enamel surfaces in vitro by measuring contact angles. METHODS： A flat surfaces measured 4×4mm^2 was prepared on labial surfaces of 15 freshly extracted human incisors and the surfaces were then treated with toothpaste slurry, distilled water, artificial saliva and saliva accordingly, and contact angles were measured. RESULTS： The contact angles were significantly decreased after treated with polyphosphate containing toothpastes. These results indicate that brushing with toothpastes containing polyphosphate could increase users cleaning experience and satisfaction of tooth shine. CONCLUTION ： Toothpastes containing polyphosphate can increase wetting of enamel surface, which can improve consumer＇s tooth - brushing experience.