Zhang Zhe-chen, Giordano Russell, Shen Gang, Chou L Lee, Qian Yu-fen
Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Room 213, Building No.1, Zhi-Zao-Ju Road, 639, Shanghai, China.
J Orofac Orthop. 2013 Jul;74(4):319-31. doi: 10.1007/s00056-013-0154-z. Epub 2013 Jun 28.
The in vitro shear bond strength of MZ100 brackets (an experimental composite bracket developed by the Dental Biomaterial Laboratory at Boston University) and the effect of different treatment methods on these brackets were evaluated.
As the bonding substrates, 80 Vitablocs® Mark II (Vident, Brea, CA, USA) were chosen. Three treatment methods were employed on 60 MZ100 bracket bases (20 brackets per treatment): silane coupling agent (Porcelain Primer; Ormco, Orange, CA, USA), sandblasting (Basic Professional Model Sandblaster; Renfert GmbH, Germany), and non-treatment. Two different orthodontic adhesives were also used: Blugloo™ (Ormco, Orange, CA, USA) and Enlight™ (Ormco, Orange, CA, USA). Twenty metal brackets were used as controls. Shear bond strength tests were performed after sample preparation and bracket bonding.
The mean shear bond strength of non-treated MZ100 brackets bonded with Enlight™ had the lowest value (7.9 MPa), while that of sandblasted MZ100 brackets bonded with Blugloo™ showed the highest value (17.9 MPa). The mean shear bond strength of non-treated MZ100 brackets was significantly lower than that of the other groups (p<0.05). The mean shear bond strength of sandblasted MZ100 brackets bonded with Blugloo™ was significantly higher than that of those bonded with Enlight™ (p<0.05). With the exception of the silane-Blugloo™ group, the treated MZ100 brackets demonstrated shear bond strengths that did not significantly differ from metal brackets.
The use of sandblasting and silane coupling agent significantly increases the shear bond strength of the MZ100 brackets to values resembling those of metal brackets.
评估MZ100托槽（由波士顿大学牙科生物材料实验室研发的一种实验性复合托槽）的体外剪切粘结强度以及不同处理方法对这些托槽的影响。
选用80个维他必克®Mark II（美国加利福尼亚州布雷亚市Vident公司）作为粘结基底。对60个MZ100托槽底座采用三种处理方法（每种处理20个托槽）：硅烷偶联剂（瓷用底漆；美国加利福尼亚州奥兰治市奥美科公司）、喷砂处理（基础专业型喷砂机；德国Renfert有限公司）和不处理。还使用了两种不同的正畸粘结剂：Blugloo™（美国加利福尼亚州奥兰治市奥美科公司）和Enlight™（美国加利福尼亚州奥兰治市奥美科公司）。使用20个金属托槽作为对照。在样本制备和托槽粘结后进行剪切粘结强度测试。
用Enlight™粘结的未处理MZ100托槽的平均剪切粘结强度最低（7.9兆帕），而用Blugloo™粘结的喷砂处理MZ100托槽的平均剪切粘结强度最高（17.9兆帕）。未处理MZ100托槽的平均剪切粘结强度显著低于其他组（p<0.05）。用Blugloo™粘结的喷砂处理MZ100托槽的平均剪切粘结强度显著高于用Enlight™粘结的（p<0.05）。除了硅烷 - Blugloo™组外，处理后的MZ100托槽的剪切粘结强度与金属托槽相比无显著差异。
喷砂处理和硅烷偶联剂的使用显著提高了MZ100托槽的剪切粘结强度，使其值与金属托槽相近。
