Rotstein I
Department of Endodontics, Hebrew University, Jerusalem, Israel.
Oral Surg Oral Med Oral Pathol. 1991 Nov;72(5):602-6. doi: 10.1016/0030-4220(91)90500-c.
Bleaching pulpless teeth with 30% hydrogen peroxide was reported to cause external cervical root resorption. It was hypothesized that H2O2 penetrated open dentin tubules to initiate an inflammatory response that could result in root resorption. No direct experimental evidence was provided to support this theory. An in vitro model for determination and quantification of H2O2 penetration during bleaching procedures is suggested. Artificial defects of the cementum covering the cementoenamel junction were performed in 22 extracted human premolars. After 15 minutes of thermocatalytic bleaching, H2O2 could be detected in the medium surrounding all the tested teeth. Cervical root permeability to 30% H2O2 could reach up to 82% of the total amount applied.
据报道，用30%的过氧化氢漂白无髓牙会导致颈外牙根吸收。据推测，过氧化氢通过开放的牙本质小管渗透，引发炎症反应，进而可能导致牙根吸收。但并未提供直接的实验证据来支持这一理论。本文提出了一种用于测定和量化漂白过程中过氧化氢渗透情况的体外模型。在22颗拔除的人类前磨牙上制作覆盖牙骨质牙釉质交界的牙骨质人工缺损。经热催化漂白15分钟后，在所有受试牙齿周围的介质中均可检测到过氧化氢。颈牙根对30%过氧化氢的渗透率可达所用总量的82%。
