含二氧化钛的激光活化漂白剂对人牙釉质的微观结构影响
Microstructural effect of a laser-activated bleaching agent containing titanium dioxide on human enamel.
作者信息
Besegato João Felipe, Silva Aryvelto Miranda, de Almeida Eran Nair Mesquita, Rastelli Alessandra Nara de Souza, Takahashi Ricardo, Dezan-Garbelini Cássia Cilene, Hoeppner Márcio Grama
机构信息
Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil.
Department of Oral Medicine and Paediatric Dentistry, State University of Londrina - UEL, Londrina, PR, Brazil.
出版信息
J Conserv Dent. 2020 Nov-Dec;23(6):558-562. doi: 10.4103/JCD.JCD_312_19. Epub 2021 Feb 11.
AIM
This study aimed to evaluate the effect of a laser-activated bleaching agent containing titanium dioxide (TiO) nanoparticles on enamel roughness and hardness.
MATERIALS AND METHODS
Twenty human premolars were randomized into two groups according to the bleaching treatments performed: HP - 35% hydrogen peroxide and HP + TiO - 30% hydrogen peroxide containing TiO light-activated by diode laser (980 nm). It was performed two bleaching sessions with an interval of 7 days. Microhardness and roughness of the enamel were assessed at three times: T0 - Before 1 appointment, T1 - after 2 appointment, and T2-7 days after 2 appointment.
RESULTS
The HP + TiO did not cause changes on enamel roughness and hardness and presented the same effects of the HP.
CONCLUSIONS
Both bleaching agents showed no difference between them. Then, it is possible to conclude that both are viable for clinical use during in-office dental bleaching technique regarding the microstructural changes that they might cause.
目的
本研究旨在评估含二氧化钛（TiO）纳米颗粒的激光激活漂白剂对牙釉质粗糙度和硬度的影响。
材料与方法
根据所进行的漂白处理，将20颗人类前磨牙随机分为两组：HP组——35%过氧化氢；HP + TiO组——30%过氧化氢含经二极管激光（980 nm）光激活的TiO。进行了两次漂白疗程，间隔7天。在三个时间点评估牙釉质的显微硬度和粗糙度：T0——第一次就诊前，T1——第二次就诊后，以及T2——第二次就诊后7天。
结果
HP + TiO组未引起牙釉质粗糙度和硬度的变化，且呈现出与HP组相同的效果。
结论
两种漂白剂之间无差异。因此，可以得出结论，就它们可能引起的微观结构变化而言，在诊室牙齿漂白技术中，两种漂白剂都适用于临床使用。
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