不同处理方法对脱落托槽再粘接抗剪切强度的影响

›› 2018, Vol. 38 ›› Issue (3): 230-233.

不同处理方法对脱落托槽再粘接抗剪切强度的影响

操亚波,傅露,孙旭容,林新平

杭州口腔医院

收稿日期:2017-01-10 修回日期:2017-02-16 出版日期:2018-03-28 发布日期:2018-03-16
通讯作者: 林新平 E-mail:xplinzju@163.com

Influence of shear bond strength of rebonded metal brackets treated with three different methods

Ya-Bo CAO¹,Lu FU¹,Xu-Rong SUN

Received:2017-01-10 Revised:2017-02-16 Online:2018-03-28 Published:2018-03-16

摘要/Abstract

摘要： 目的：比较三种不同处理方法去除脱落正畸托槽底板残留粘接剂，对托槽再次粘接时抗剪切强度大小的影响。方法：挑选因正畸需要而拔除的完整前磨牙80颗，随机分成4组，每组20个样本，分别按常规方法粘接网底型直丝弓正畸托槽，通过万能材料测试仪测试并记录其脱落时的抗剪切强度后，第一组更换新托槽，第二组采用喷砂法、第三组采用燃烧法、第四组采用磨除法去除托槽底板残留粘接剂，再次粘接托槽，在同样条件下测试并记录其脱落时的抗剪切强度。结果：更换新托槽组、喷砂组再次粘接时其抗剪切强度与初次粘接无显著性差异（P＞0.05），燃烧组、磨除组再次粘接时其抗剪切强度与初次粘接相比明显减小（P＜0.05）。喷砂组再次粘接的抗剪切强度与更换新托槽组无显著性差异（P＞0.05）。燃烧组、磨除组再次粘接的抗剪切强度比更换新托槽组明显减小（P＜0.05）。结论：为了获得理想的粘接强度，脱落托槽再利用时宜采用喷砂法进行处理，不宜采用燃烧法和磨除法进行处理。

关键词: 托槽, 粘接, 抗剪切强度, 喷砂

Abstract: Objective：To compare shear bond strength(SBS) of rebonded metal orthodontic brackets between three kinds of treatment methods．Method：80 extracted human premolars were selected and evenly divided into four groups. The brackets were bonded to the 80 premolars and were debonded with shear tests to record the SBS. Residual adhesives on the base mesh of the brackets were treated with three different methods. In group I, new brackets were reused. In group Ⅱ, Ⅲ, Ⅳ, the base mesh were dealt with sandblasting, burning or carbide bur grinding, respectively. The brackets were rebonded and shear tests were performed among different groups. Results: In group I and group Ⅱ,the SBS of the second bonding was very closed to the first bonding, there was no significant difference between the second bonding and the first bonding ( P > 0 .0 5 ), In group Ⅲ and group Ⅳ, the SBS of the second bonding was significantly lower than the first bonding ( P ＜ 0 .0 5 ). There was no significant difference of the SBS of the second bonding between group Ⅱ and group I（P＞0.05）， In group Ⅲ and group Ⅳ, the SBS of the second bonding was significantly lower than the SBS of the second bonding In group I ( P ＜ 0 .0 5 ). Conclusion: To obtain enough bonding strength, was suggested to remove residual adhesives from the base mesh of bracket, carbide bur grinding and burning should not be used.

Key words: Orthodontic bracket, Bonding, Shear bond strength (SBS ), Sandblasting

中图分类号:

R783.5

操亚波傅露孙旭容林新平. 不同处理方法对脱落托槽再粘接抗剪切强度的影响[J]. , 2018, 38(3): 230-233.

Ya-Bo CAO Lu FU Xu-Rong SUN. Influence of shear bond strength of rebonded metal brackets treated with three different methods[J]. , 2018, 38(3): 230-233.

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