Larmour C J, McCabe J F, Gordon P H
Orthodontic Department, Middlesbrough General Hospital, U.K.
Br J Orthod. 1998 Feb;25(1):35-9. doi: 10.1093/ortho/25.1.35.
The problems of ceramic bracket debond have been well documented. A peppermint oil material has been marketed previously as a debonding agent. This study assessed ex vivo the effects of peppermint oil application on the debond behaviour of ceramic brackets compared with ethanol and acetone which are recognized softening agents. Intrigue brackets were bonded to 100 extracted premolar teeth. Groups of 20 bonded teeth were then placed in a test solution, control (distilled water), peppermint oil (5 minutes and 1 hour), acetone (1 hour), and ethanol (1 hour). The teeth were debonded using an Instron. Universal Testing Machine and debond forces recorded. The site of bond failure along with the adhesive remnant index was recorded for each tooth. One hour placement in peppermint oil produced the lowest mean and maximal debond forces (77 and 114 N, respectively). Weibull analysis showed that the probability of failure at 100 N was increased for the 1-hour peppermint group at 88 per cent compared with 52 per cent for the control. Placement in peppermint oil produced the lowest levels of retained resin. There was no evidence of enamel fracture with any of the groups, but bracket fracture remained a problem.
陶瓷托槽脱粘的问题已有充分记录。之前有一种薄荷油材料作为脱粘剂上市。本研究在体外评估了与公认的软化剂乙醇和丙酮相比，应用薄荷油对陶瓷托槽脱粘行为的影响。将Intrigue托槽粘结到100颗拔除的前磨牙上。然后将20颗粘结牙一组分别置于测试溶液中，对照组（蒸馏水）、薄荷油组（5分钟和1小时）、丙酮组（1小时）和乙醇组（1小时）。使用英斯特朗万能材料试验机使牙齿脱粘并记录脱粘力。记录每颗牙齿的粘结失败部位以及粘结剂残留指数。在薄荷油中放置1小时产生的平均脱粘力和最大脱粘力最低（分别为77 N和114 N）。威布尔分析表明，与对照组的52%相比，1小时薄荷油组在100 N时的失败概率增加到88%。置于薄荷油中产生的残留树脂水平最低。没有证据表明任何一组存在牙釉质骨折，但托槽骨折仍然是一个问题。
