Crow V
Orthodontic Department, Royal London Hospital, London, UK.
Br J Orthod. 1995 Nov;22(4):325-30. doi: 10.1179/bjo.22.4.325.
Fibreglass reinforced brackets (FGBs) and ceramic brackets were bonded to the enamel of extracted premolars to evaluate their shear bond strength and fracture mode. One-hundred extracted premolars were divided into five groups, and combinations of two-paste and no-mix composite, and plastic bracket conditioner were used in the test groups. Bond strength testing was carried out 24 hours after direct bonding. The shear strength of ceramic brackets with a two-paste composite was significantly higher than FGBs bonded with either two-mix or no-mix composite ( P < 0.05). Ceramic brackets bonded with two-mix and no-mix composite demonstrated a 30 and a 10 percent enamel fracture rate, respectively. There were no enamel or bracket fractures in any of the FGB groups.
将玻璃纤维增强托槽（FGBs）和陶瓷托槽粘结到拔除的前磨牙牙釉质上，以评估它们的剪切粘结强度和断裂模式。100颗拔除的前磨牙被分为五组，试验组使用双糊剂和非混合复合树脂以及塑料托槽粘结剂的组合。直接粘结24小时后进行粘结强度测试。使用双糊剂复合树脂的陶瓷托槽的剪切强度显著高于使用双混合或非混合复合树脂粘结的FGBs（P < 0.05）。使用双混合和非混合复合树脂粘结的陶瓷托槽的牙釉质骨折率分别为30%和10%。在任何FGB组中均未出现牙釉质或托槽骨折。
