Ramsköld L O, Fong C D, Strömberg T
Department of Clinical Oral Sciences, Karolinska Institutet, Huddinge, Sweden.
J Endod. 1997 Feb;23(2):96-100. doi: 10.1016/S0099-2399(97)80253-1.
Thermal effects and antibacterial properties of an Nd:YAG laser were studied to establish clinically safe levels of energy to deliver into the root canal and to determine the energy level needed to sterilize infected root canals. The results indicate that lasing cycles of 3 J-s for 15 s followed by a 15-s recovery interval can be continued for prolonged periods without risk of thermal damage to surrounding tissues. In vitro lasing of root canals inoculated with dark stained bacteria showed that two such lasing cycles sterilized only two out of eight canals, whereas when four cycles were used seven out of eight canals were sterilized. Guidelines for energy levels in endodontic Nd:YAG laser work are discussed, and base data for calculating appropriate energy levels are given.
研究了Nd:YAG激光的热效应和抗菌性能，以确定临床上安全的根管内能量输送水平，并确定感染根管消毒所需的能量水平。结果表明，以3J-s的激光脉冲持续15秒，随后有15秒的恢复间隔，可以长时间持续进行，而不会对周围组织造成热损伤风险。对接种深色细菌的根管进行体外激光照射显示，两个这样的激光脉冲仅使八根管中的两根得到消毒，而使用四个脉冲时，八根管中的七根得到了消毒。讨论了牙髓Nd:YAG激光治疗中的能量水平指南，并给出了计算适当能量水平的基础数据。
