不同类型保持器对固定矫治后再矿化的影响

摘要

AIM:To observe the effect of enamel remineralization by different retainers and the effect of remineralization by fluoride protector after fixed orthodontic treatment.METHODS:Patients were randomly assigned into traditional retainer group (Group A,1 17 teeth)and vacuum-formed retainer group (Group B,1 16 teeth).In group A and B the patients were divided into 3 groups.In group 1 ,the teeth surface was coated with 0.9% sodium chloride solution;in group 2,fluoride protector (1 mg/mL F-IvoclarVivadent)was directly applied;in group 3,the demineralization area of the teeth was acid etched,then fluoride protector was spreaded on the whole tooth surface.The demineralization area of each tooth was measured by software ZWCAD2010.The data were analyzed by SPSS 17.0. RESULTS:When the fixed appliance was removed the demineralization area was similar in all the groups(P>0.05). After 3 months of remineralization treatment the demineralization area change in groups B was more significant than that of groups A(P<0.05),that of groups 2 and 3 was more significant than that of groups 1 (P<0.05),and there was no difference between groups 2 and groups 3(P>0.05).COMCLUSION:Using traditional Hawley retainer is more prone to remineralization.Topical fluoride application is effective for remineralization.%目的：观察不同类型保持器对固定矫治后牙釉质再矿化的影响，以及氟保护剂的再矿化作用。方法：将30名固定矫治结束后釉质脱矿患者随机分为2组（n＝15），传统保持器组（A组，117个牙）和压膜保持器组（B组，116个牙）每组再分为3个亚组，分别进行不同再矿化处理。1组：生理盐水；2组：1 mg/mL氟保护剂；3组：350 g/L磷酸凝胶酸蚀＋1 mg/mL氟保护剂。每月复诊处理1次并观察半年，用ZWCAD2010软件测量数据并进行统计学分析。结果：拆除固定矫治器时A、B组内以及相应各亚组间釉质脱矿面积差异无统计学意义（P＞0．05）。再矿化处理后釉质脱矿面积改变量：A1组＜A2、A3组（P＜0．05）；A2和A3组无统计学差异（P＞0．05）；B1组＜B2、B3组（P＜0．05），B2和B3组无统计学差异（P＞0．05）；A1＞B1、A2＞B2、A3＞B3，均P＜0．05。结论：用传统保持器更有利于再矿化；给予氟保护剂能够促进再矿化。