4种防龋方法在固定矫治中预防牙釉质脱矿的研究

目的:比较4种防龋方法在正畸固定矫治中预防牙釉质脱矿的效果.方法:采用固定矫治器矫治的200名患者随机分为4组(n=50),分别用普通牙膏、含氟牙膏、氟保护漆和护牙素对牙釉质进行处理,定期随访,比较矫治完成后4组患者的牙釉质脱矿情况.结果:按牙齿数计算含氟牙膏、普通牙膏、氟保护漆和护牙素4组牙釉质的脱矿率分别为16.3％、21.9％、9.3％和8.5％ (x2=99.7,P=0.000001)氟保护漆和护牙素组脱矿率低于其他2组,该2组脱矿率之间的差异无统计学意义(x2=0.39,P=0.529851).结论:应用含氟制剂可以有效预防固定矫治中牙釉质脱矿的发生,护牙素和氟保护漆的效果更明显.

Clinical evaluation of the preventing effect of 4 anti-caries preparations on enamel decalcification in orthodontic treatment with fixed appliance

Objective:To evaluate the preventing effects of 4 anti-caries preparations on enamel demineralization in fixed appliance orthodontic treatment.Methods:200 patients treated with fixed appliance were included and randomly divided into 4 groups (n =50),the teeth were treated with fluoride-containing toothpaste,fluoride varnish,fluoride free toothpaste and casein phosphopeptide-amorphous calcium phoaphate(CPP-ACP) respectively.The enamel decalcification incidence was calculated after orthodontic treatment.Results:The incidence of enamel decalcification calculated by tooth number was 16.3％ in fluoride-containing toothpaste group,9.3％ in fluoride varnish group,21.9％ in fluoride free toothpaste and 8.5％ in CPP-ACP group(among groups,P ＜0.05;between CPP-ACP and fluoride varnish,P ＞ 0.05).Conclusion:Fluoride containing preparation can prevent the enamel demineralization during the fixed appliance orthodontic treatment,CPP-ACP and fluoride varnish are more effective.