一种用于粘结正畸托槽的新型纳米填充修复材料的评估。

Evaluation of a new nano-filled restorative material for bonding orthodontic brackets.

作者信息

Bishara Samir E, Ajlouni Raed, Soliman Manal M, Oonsombat Charuphan, Laffoon John F, Warren John

机构信息

Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, IA 52242, USA.

出版信息

World J Orthod. 2007 Spring;8(1):8-12.

PMID:17373220

Abstract

AIM

To compare the shear bond strength of a nano-hybrid restorative material, Grandio (Voco, Cuxhaven, Germany), to that of a traditional adhesive material (Transbond XT; 3M Unitek, Monrovia, CA, USA) when bonding orthodontic brackets.

MATERIAL AND METHODS

Forty teeth were randomly divided into 2 groups: 20 teeth were bonded with the Transbond adhesive system and the other 20 teeth with the Grandio restorative system, following manufacturer's instructions. Student t test was used to compare the shear bond strength of the 2 systems. Significance was predetermined at P 5 .05.

RESULTS

The t test comparisons (t = 0.55) of the shear bond strength between the 2 adhesives indicated the absence of a significant (P = .585) difference. The mean shear bond strength for Grandio was 4.1 +/- 2.6 MPa and that for Transbond XT was 4.6 +/- 3.2 MPa. During debonding, 3 of 20 brackets (15%) bonded with Grandio failed without registering any force on the Zwick recording. None of the brackets bonded with Transbond XT had a similar failure mode.

CONCLUSIONS

The newly introduced nano-filled composite materials can potentially be used to bond orthodontic brackets to teeth if its consistency can be more flowable to readily adhere to the bracket base.

摘要

目的

比较纳米混合修复材料Grandio（德国库克斯港Voco公司）与传统粘接材料（Transbond XT；美国加利福尼亚州蒙罗维亚3M Unitek公司）在粘接正畸托槽时的剪切粘接强度。

材料与方法

40颗牙齿随机分为2组：20颗牙齿按照制造商说明用Transbond粘接系统进行粘接，另外20颗牙齿用Grandio修复系统进行粘接。采用学生t检验比较两种系统的剪切粘接强度。显著性水平预先设定为P≤0.05。

结果

两种粘接剂剪切粘接强度的t检验比较（t = 0.55）表明无显著差异（P = 0.585）。Grandio的平均剪切粘接强度为4.1±2.6 MPa，Transbond XT的平均剪切粘接强度为4.6±3.2 MPa。在脱粘过程中，20个用Grandio粘接的托槽中有3个（15%）在Zwick记录上未记录到任何力的情况下失败。用Transbond XT粘接的托槽均未出现类似的失败模式。