Evaluation of effectiveness of Er,Cr:YSGG laser for root canal disinfection: theoretical simulation of temperature elevations in root dentin.
Evaluation of effectiveness of Er,Cr:YSGG laser for root canal disinfection: theoretical simulation of temperature elevations in root dentin.
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Er,Cr:YSGG 激光根管消毒效果评价：根部牙本质温度升高的理论模拟。
DOI：
10.1115/1.3147801
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Meza,F
中科院分区：
文献类型：
--
作者：
Zhu,L;Tolba,M;Arola,D;Salloum,M;Meza,F
铒、铬、钇、钪、镓、石榴石（Er、Cr:YSGG）激光目前正在研究用于消毒根管系统。在使用激光治疗之前，了解温度分布和评估周围组织的热损伤是很重要的。在本研究中，使用Pennes生物热方程进行了理论模拟，以评估Er，Cr:YSGG激光如何从管表面传播热量。调查结果表明，一些提出的治疗方案，杀死细菌在深层牙本质是无效的，即使长时间的加热持续时间。基于模拟，确定了一种替代治疗方案，该方案提高了有效性，并且不太可能对周围组织造成附带损伤。另一种方案使用350兆瓦的激光功率和重复的激光尖端运动来实现深层牙本质（从根管表面外侧）的细菌消毒，同时避免对周围组织的热损伤。替代治疗方案不仅有可能实现深层牙本质的细菌消毒，而且还可以缩短治疗时间，从而最大限度地减少激光治疗过程中潜在的患者不适。
Erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) lasers are currently being investigated for disinfecting the root canal system. Prior to using laser therapy, it is important to understand the temperature distribution and to assess thermal damage to the surrounding tissue. In this study, a theoretical simulation using the Pennes bioheat equation is conducted to evaluate how heat spreads from the canal surface using an Er,Cr:YSGG laser. Results of the investigation show that some of the proposed treatment protocols for killing bacteria in the deep dentin are ineffective, even for long heating durations. Based on the simulation, an alternative treatment protocol is identified that has improved effectiveness and is less likely to introduce collateral damage to the surrounding tissue. The alternative protocol uses 350 mW laser power with repeating laser tip movement to achieve bacterial disinfection in the deep dentin (lateral from the canal surface), while avoiding thermal damage to the surrounding tissue. The alternative treatment protocol has the potential to not only achieve bacterial disinfection of deep dentin but also shorten the treatment time, thereby minimizing potential patient discomfort during laser procedures.