Komori T, Yokoyama K, Matsumoto Y, Matsumoto K
Department of Oral Surgery, Faculty of Medicine, University of Tokyo, Japan.
J Clin Laser Med Surg. 1997 Feb;15(1):9-13. doi: 10.1089/clm.1997.15.9.
Root resection of extracted human teeth was performed using the erbium:YAG (Er:YAG) and holmium:YAG (Ho:YAG) laser to investigate the clinical application of lasers on hard tissue. The CO2 laser and the mechanical drill were also used for comparison. After resection using these technologies, the morphological changes of the cut surface were investigated by optical and scanning electron microscope. Er:YAG laser irradiation produced smooth, clean resected surfaces without signs of thermal damages. Complete obturation of the root canal was maintained after Er:YAG laser irradiation. Ho:YAG laser irradiation, however, produced some signs of thermal damage. Relatively large voids between the gutta-percha and the canal walls were revealed after Ho:YAG laser irradiation. The sealing of the dentinal tubules was not completely attained as stipulated by original conditions of this study.
使用铒激光（Er:YAG）和钬激光（Ho:YAG）对拔除的人牙进行根管切除术，以研究激光在硬组织上的临床应用。同时使用二氧化碳激光和机械钻进行比较。在使用这些技术进行切除后，通过光学显微镜和扫描电子显微镜研究切割表面的形态变化。Er:YAG激光照射产生光滑、清洁的切除表面，没有热损伤迹象。Er:YAG激光照射后根管保持完全封闭。然而，Ho:YAG激光照射产生了一些热损伤迹象。Ho:YAG激光照射后，牙胶与根管壁之间出现了相对较大的空隙。本研究的原始条件规定的牙本质小管封闭未完全实现。
