摘要
目的:观察、比较不同黏结材料、不同酸蚀方法黏结正畸金属托槽后的微渗漏情况。方法:选择因正畸拔除的健康前磨牙36颗,随机分成3组,每组12颗。A组:37%磷酸酸蚀,京津釉质黏结剂黏结金属托槽;B组:37%磷酸酸蚀,3MTransbond光固化黏结剂黏结;C组:自酸蚀系统+3MTransbond光固化黏结剂。所有样本进行冷热循环,1%亚甲蓝溶液染色后,立体显微镜下观察并测量各组托槽周围微渗漏情况。用SPSS11.0统计软件对试验结果先进行方差齐性检验,F检验有统计学意义,进一步用Q检验进行组间比较。结果:①3组间微渗漏差别有统计学意义(F=22.462,P<0.01),两两比较发现,A组与B组的微渗漏差别无统计学意义(P>0.05);而A、B组均较C组的微渗漏小,差别有显著性(P<0.05)。②3组龈方微渗漏均大于牙合方,差别有统计学意义(分别为P<0.05、P<0.01、P<0.01)。结论:①微渗漏的大小与黏结剂的种类无明显关系。②不同酸蚀方法间的微渗漏差别明显,自酸蚀组较磷酸酸蚀组的微渗漏明显大。③同种材料、同种酸蚀方法,托槽龈方微渗漏明显大于牙合方。
PURPOSE： To observe and compare the effect of different types of adhesive materials and different types of etching methods on microleakage around bonded metal brackets. METHODS： 36 healthy premolars extracted for orthodontic reason were selected in the study. The samples were divided into three groups, 12 in each. Group A was etched with 37% phosphate and bonded with Jingjin adhesive; Group B was with 37% phosphate＋3M Transbond ; Group C was self-etching primer ＋ 3M Transbond . All samples were thermalcycled for 500 times, then put into 1% methylenum solution for 24 hours. Microleakage of samples was observed under stereomicroscope. Multiple comparison and Student t test were used for the comparison of data samples （α=0.05）. RESULTS： ①Significant difference of microleakage was found among three groups （F=22.462, P〈0.01）; Multiple comparison showed no significant difference between Group A and Group B （P〉0.05）, significant differences of microleakage were found between group A and C （P〈0.05）, group B and C （P〈 0.05）, respectively. ② Significant differences between occlusal microleakage and gingival microleakage were found in group A （P〈0.05）, group B （P〈0.01） and group C （P〈0.01）, respectively. CONCLUSIONS： ① The type of adhesive had no effect on microleakage. ②Different etching methods are relevant to microleakage, the microleakage of self-etching groups is much more than that of phosphate-etching groups. ③ Gingival microleakage is significantly larger than occlusal microleakage.
出处
《上海口腔医学》
CAS
CSCD
2005年第6期645-647,共3页
Shanghai Journal of Stomatology
关键词
酸蚀
黏结剂
金属托槽
微渗漏
Etching
Bonding adhesive
Metal bracket
Microleakage
