Chunhacheevachaloke E, Tyas M J
Faculty of Dentistry, Srinakharinwirot University, Thailand.
Aust Orthod J. 1997 Oct;15(1):10-5.
In this study, two types of ceramic brackets--monocrystalline and polycrystalline--were bonded to unroughened and roughened resin-composite discs using a light-cured orthodontic adhesive, and the bonds tested under shear stress in a universal testing machine. There was no significant difference in the shear bond strength between the combinations of ceramic brackets, and between the surface treatments of the resin composite. A higher frequency of resin-composite fracture was observed with the polycrystalline brackets (12/20) than with the monocrystalline ceramic brackets (7/20). It is concluded that debonding any type of ceramic bracket from a resin-composite surface may cause damage to the resin composite itself.
在本研究中，使用光固化正畸粘合剂将两种类型的陶瓷托槽——单晶和多晶——粘结到未粗糙化和粗糙化的树脂复合材料圆盘上，并在万能试验机中对粘结进行剪切应力测试。陶瓷托槽组合之间以及树脂复合材料表面处理之间的剪切粘结强度没有显著差异。观察到多晶托槽（12/20）导致树脂复合材料断裂的频率高于单晶陶瓷托槽（7/20）。得出的结论是，从树脂复合材料表面去除任何类型的陶瓷托槽都可能对树脂复合材料本身造成损坏。
