摘要
目的 :研究托槽直接黏结技术中酸蚀牙面、树脂黏结剂、托槽及黏结剂去除过程等因素对牙面颜色的影响。方法:取新鲜离体前磨牙100颗,随机分为空白对照组、酸蚀组、黏结剂组、酸蚀+黏结剂组和酸蚀+黏结剂+金属托槽组。实验前、实验后7、30d时,使用电脑比色仪测量牙面颜色的L*、a*和b*值,计算实验前、后的△E*值。采用SPSS16.0软件包对数据进行统计学分析。结果:7 d时间点,各实验组较对照组ΔE*值显著增加,酸蚀+黏结剂+金属托槽组和酸蚀组ΔE值均>3.3,即出现临床可识别的变化,但2组间无显著差异;30 d时间点,ΔE*值酸蚀+黏结剂+托槽组>酸蚀组和酸蚀+黏结剂组>黏结剂组>空白对照组,所有处理组△E*均>3.3。结论:固定矫治过程中,牙面酸蚀处理和长时间配戴矫治器的托槽腐蚀,是导致牙面颜色改变的重要因素。黏结剂去除过程造成的牙面损伤,也会影响牙面颜色。
PURPOSE： To investigate effects of acid etching, adhesives, brackets and debonding process on tooth color during direct bonding technique. METHODS： One hundred freshly extracted premolars were divided into blank control,acid etching, adhesive, acid etching ＋adhesive and acid etching ＋adhesive ＋bracket group. Computerized colorimeter was utilized to evaluate L＊, a＊ and b＊ of tooth color parameters before treatment, 7 days and 30 days after treatment. SPSS16.0 software package was utilized for statistical analysis. RESULTS： At 7 day,ΔE＊ value in all experimental groups were significantly higher than blank control group. ΔE＊ values of acid etching＋adhesive＋bracket group, and acid etching group were greater than 3.3,showing that recognizable clinic change was observed, but no significant difference was observed between the 2 groups. At 30 d, for ΔE＊ value, acid etching＋adhesive＋bracket group〉 acid etching group, and acid etching ＋adhesive group 〉adhesive group 〉blank control group. Recognizable clinic change was observed in all experimental groups（ΔE＊ 〉3.3）. CONCLUSIONS： In fixed orthodontic procedures, acid etching and metal erosion resulting from long time wearing braces are two important factors leading to enamel discoloration, and adhesives removing procedures may also affect tooth discoloration.
出处
《上海口腔医学》
CAS
CSCD
2015年第4期415-418,共4页
Shanghai Journal of Stomatology
基金
福建省自然科学基金(2014J01318)
福建省卫生厅中青年骨干培训面上项目(2014ZQN-JC21)~~
关键词
酸蚀
黏结
托槽
牙着色
Acid etching
Bonding
Bracket
Tooth discoloration
