Crest抗牙石牙膏对中学生龈上牙石形成的影响

The Effect of a Crest Toothpaste on Calculus Formation: A 12 month Study

１３１名学生使用含５％可溶性焦磷酸盐Ｃｒｅｓｔ牙膏，评价该牙膏对牙石形成的影响。采用Ｖ－Ｍ指数检查牙石，ＢＩ指数检查牙龈情况。１２个月后符合标准纳入统计者１００人。６个月结果表明，实验牙膏组Ｖ－Ｍ均数为５．０６，对照组为６．９８。差别为２７．５％（Ｐ＜０．０５）。１２个月检查实验组Ｖ－Ｍ均数为７．２０，而对照组为９．３８，差别为２３．２％（Ｐ＜０．０５）。结果表明该牙膏对牙石形成有一定预防效果。

The purpose of this study was to evaluate the clinical effect of the Crest toothpaste containing 5% pyrophosphate on dental calculus reduction. A single blind clinical study was conducted among 131 students over 12 months. The examiner employed the criteria described by Volpe Manhold for assessing supragingival calculus. Following baseline calculus and gingivitis examinations and a dental prophylaxis, these students were randomly assigned to three groups, Group One and Group Two used a Crest toothpaste with or without a pyrophosphate, Group Three used toothpastes formulation. Subjects were instructed to brush their teeth using their assigned dentifrice at home twice daily. Calculus and gingivitis were examinated after using of the dentifrice for three months, six months and twelve months. After 12 months completion of the study, 100 subjects were available for examination. The results showed that the group using the Crest tartar control toothpaste experienced a significant 23.2% decrease in calculus formation as compared with the placebo group, and significant 35.5% decrease with the control group. Both Crest dentifrices were equally well tolerated by the oral soft tissues.