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探讨激光辅助诊室牙齿漂白的疗效:使用二极管激光(445nm)研究不同辐照时间和功率设置。

Exploring the efficacy of laser-assisted in-office tooth bleaching: A study on varied irradiation times and power settings utilizing a diode laser (445 nm).

机构信息

Department of Operative Dentistry, Faculty of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.

Department of Operative Dentistry, Faculty of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.

出版信息

J Photochem Photobiol B. 2024 Aug;257:112970. doi: 10.1016/j.jphotobiol.2024.112970. Epub 2024 Jun 28.

Abstract

The aim of this study was to evaluate the effectiveness of a laser-assisted in-office tooth bleaching treatment, employing a diode laser (445 nm) using different power and time settings. Two hundred human incisors were collected for evaluating tooth color change (ΔΕ) and whiteness index in dentistry (ΔWI) following laser-assisted tooth bleaching treatment. The specimens were distributed into 25 groups (n = 8) according to laser output power (0.5-2 W) and duration of irradiation (10-60 s) that was applied. ΔΕ and ΔWI were evaluated using a spectrophotometer at three points of time (24 h, 1 week and 1 month after treatments). Three-way ANOVA revealed that power, duration of laser irradiation, and time of measurement after bleaching treatments significantly affected both ΔΕ and ΔWI(p < 0.05). Furthermore, laser irradiation increased ΔΕ and ΔWI at all applied powers compared to the control group (p < 0.05), but this increase was dependent on the duration of irradiation. Laser irradiation significantly increased ΔΕ when the duration of operation was 50-60 s at 0.5-1 W, while at 1.5-2 W was significantly increased when the duration was 30-60 s. ΔWI was significant higher in the laser groups compared to the control group at all powers, except for 0.5 W where it was significant higher when the duration was 50-60 s. The outcomes of the study can help in selecting the suitable power settings and duration of laser exposure to achieve the optimal whitening results while ensuring the safety of the tooth pulp.

摘要

本研究旨在评估使用二极管激光(445nm)不同功率和时间设置进行诊室辅助牙齿漂白治疗的效果。收集了 200 个人类切牙,用于评估激光辅助牙齿漂白治疗后牙齿颜色变化(ΔΕ)和牙科白度指数(ΔWI)。根据激光输出功率(0.5-2W)和照射时间(10-60s)将标本分为 25 组(n=8)。使用分光光度计在三个时间点(治疗后 24 小时、1 周和 1 个月)评估ΔΕ和ΔWI。三因素方差分析表明,功率、激光照射时间和漂白治疗后测量时间对ΔΕ和ΔWI均有显著影响(p<0.05)。此外,与对照组相比,激光照射在所有应用功率下均增加了ΔΕ和ΔWI(p<0.05),但这种增加取决于照射时间。当操作时间为 50-60s 时,在 0.5-1W 时激光照射显著增加了ΔΕ,而当操作时间为 30-60s 时,在 1.5-2W 时显著增加了ΔΕ。与对照组相比,所有功率下的激光组的ΔWI 均显著升高,除了 0.5W 时,当操作时间为 50-60s 时,ΔWI 显著升高。本研究的结果可以帮助选择合适的功率设置和激光暴露时间,以达到最佳的美白效果,同时确保牙髓的安全性。

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