Bennett Zackary Yale, Walsh Laurence James
School of Dentistry, The University of Queensland, Brisbane, Australia.
Professor, School of Dentistry, The University of Queensland, Brisbane, Australia, Phone: 61733658160, e-mail:
J Contemp Dent Pract. 2015 Feb 1;16(2):126-9. doi: 10.5005/jp-journals-10024-1648.
Tetracycline-stained tooth structure is difficult to bleach using nightguard tray methods. The possible benefits of in-office light-accelerated bleaching systems based on the photo-Fenton reaction are of interest as possible adjunctive treatments. This study was a proof of concept for possible benefits of this approach, using dentine slabs from human tooth roots stained in a reproducible manner with the tetracycline antibiotic demeclocycline hydrochloride.
Color changes overtime in tetra-cycline stained roots from single rooted teeth treated using gel (Zoom! WhiteSpeed(®)) alone, blue LED light alone, or gel plus light in combination were tracked using standardized digital photography. Controls received no treatment. Changes in color channel data were tracked overtime, for each treatment group (N = 20 per group).
Dentin was lighter after bleaching, with significant improvements in the dentin color for the blue channel (yellow shade) followed by the green channel and luminosity. The greatest changes occurred with gel activated by light (p < 0.0001), which was superior to effects seen with gel alone. Use of the light alone did not significantly alter shade.
This proof of concept study demonstrates that bleaching using the photo-Fenton chemistry is capable of lightening tetracycline-stained dentine. Further investigation of the use of this method for treating tetracycline-stained teeth in clinical settings appears warranted.
Because tetracycline staining may respond to bleaching treatments based on the photo-Fenton reaction, systems, such as Zoom! WhiteSpeed, may have benefits as adjuncts to home bleaching for patients with tetracycline-staining.
使用夜间护齿托盘法难以漂白四环素染色的牙齿结构。基于光芬顿反应的诊室光加速漂白系统作为可能的辅助治疗方法，其潜在益处备受关注。本研究使用可重复用四环素抗生素盐酸地美环素染色的人牙根牙本质薄片，对该方法的潜在益处进行概念验证。
使用标准化数码摄影跟踪单根牙的四环素染色牙根在单独使用凝胶（Zoom! WhiteSpeed(®)）、单独使用蓝色发光二极管（LED）光或凝胶加光联合处理后的随时间颜色变化。对照组未接受治疗。对每个治疗组（每组N = 20）随时间跟踪颜色通道数据的变化。
漂白后牙本质颜色变浅，蓝色通道（黄色调）的牙本质颜色有显著改善，其次是绿色通道和亮度。光激活凝胶处理时变化最大（p < 0.0001），优于单独使用凝胶的效果。单独使用光未显著改变色度。
本概念验证研究表明，使用光芬顿化学法漂白能够减轻四环素染色的牙本质。进一步研究该方法在临床环境中治疗四环素染色牙齿的应用似乎是有必要的。
由于四环素染色可能对基于光芬顿反应的漂白治疗有反应，诸如Zoom! WhiteSpeed等系统可能作为四环素染色患者家庭漂白的辅助手段具有益处。
