Sheridan J J, Brawley G, Hastings J
Am J Orthod. 1986 Jan;89(1):21-7. doi: 10.1016/0002-9416(86)90109-0.
The contemporary techniques of bracket removal require shearing or compression forces. The force necessary to separate the bracket from the tooth is sufficient to cause deformation of the bracket and, in some cases, is capable of damaging the tooth. An alternative to conventional bracket removal is electrothermic debracketing (ETD). ETD is the technique of removing bonded brackets from enamel surfaces with a cordless battery device that generates heat. The heat is transferred to the bracket by a blade that is placed in the bracket slot. The bracket is firmly held by a thumb-activated lock-on arm of the ETD unit. When the heat applied to the bracket is transferred to and deforms the adhesive-bracket interface, the bracket can be gently lifted from the enamel surface without distortion of the bracket or excessive force to the underlying enamel. Part I of this study measured the in vitro rise in temperature at the pulpal wall when ETD is used. These data are correlated with established primate threshold temperatures that have been reported to cause pulpal pathosis. All ETD procedures in the sample elicited pulpal wall temperatures that were significantly below the primate baseline. When water spray was used in conjunction with ETD, the mean ultimate increase in pulpal wall temperature was less than 1 degree C.
当代的托槽拆除技术需要剪切力或压缩力。将托槽从牙齿上分离所需的力足以使托槽变形，在某些情况下，还可能损坏牙齿。传统托槽拆除的一种替代方法是电热脱槽（ETD）。ETD是一种使用无线电池设备产生热量从牙釉质表面拆除粘结托槽的技术。热量通过放置在托槽槽沟中的刀片传递到托槽。托槽由ETD装置的拇指激活锁定臂牢固固定。当施加在托槽上的热量传递到粘结托槽界面并使其变形时，托槽可以从牙釉质表面轻轻抬起，而不会使托槽变形或对下方的牙釉质施加过大的力。本研究的第一部分测量了使用ETD时牙髓壁的体外温度升高。这些数据与已报道的导致牙髓病变的灵长类动物阈值温度相关。样本中的所有ETD操作引起的牙髓壁温度均显著低于灵长类动物基线。当将喷水与ETD结合使用时，牙髓壁温度的平均最终升高小于1摄氏度。
