Egan F R, Alexander S A, Cartwright G E
Postgraduate Orthodontics, School of Dental Medicine, State University of New York, Stony Brook, USA.
Am J Orthod Dentofacial Orthop. 1996 Jan;109(1):64-70. doi: 10.1016/s0889-5406(96)70164-6.
A study was undertaken to determine the bond strength of brackets rebonded with a no-mix resin system or a paste-paste resin system. The efficacy of plastic conditioner and Enhance adhesion booster (Reliance Orthodontic Products, Inc., Itasca, Ill.) as an aid in rebonding was also evaluated. Sixty extracted human premolars were divided into two groups based on the two adhesive systems used. Both groups of 30 were subdivided and (1) initial bond, (2) rebond, and (3) rebond using plastic conditioner and adhesion booster. Samples were stressed to bond failure using an Instron machine. Bond separation occurred in the majority of samples at the enamel/resin interface. Mean bond strengths ranged from 78.8 kg cm-2 for rebonding with a no-mix adhesive and no other conditioners, to 182.7 kg cm-2 for initial bonding using a paste-paste adhesive. Rebonding using a paste-paste adhesive with no other conditioners produced a bond strength statistically indistinguishable from initial bonding with either system. Plastic conditioner and adhesion booster failed to improve rebond strength. The data suggest that, given certain circumstances, rebonding is a viable option when a bracket has been debonded.
开展了一项研究，以确定使用免混合树脂系统或糊剂-糊剂树脂系统重新粘结的托槽的粘结强度。还评估了塑料调节剂和增强粘结促进剂（Reliance Orthodontic Products, Inc., Itasca, Ill.）在重新粘结中的辅助效果。根据所使用的两种粘结剂系统，将60颗拔除的人类前磨牙分为两组。每组30颗又进一步细分，分别进行(1)初始粘结、(2)重新粘结以及(3)使用塑料调节剂和粘结促进剂进行重新粘结。使用Instron机器对样本施加应力直至粘结失败。大多数样本的粘结分离发生在牙釉质/树脂界面。平均粘结强度范围从使用免混合粘结剂且无其他调节剂进行重新粘结时的78.8 kg cm-2，到使用糊剂-糊剂粘结剂进行初始粘结时的182.7 kg cm-2。使用糊剂-糊剂粘结剂且无其他调节剂进行重新粘结所产生的粘结强度在统计学上与使用任一系统进行初始粘结时无法区分。塑料调节剂和粘结促进剂未能提高重新粘结强度。数据表明，在某些情况下，当托槽脱粘时，重新粘结是一种可行的选择。
