Nd:YAG와 Er:YAG 레이저를 이용한 구강내 절개의 유용성

Abstract

The purpose of this study was to irradiate the lingual sides of adult dogs with an Er:YAG or Nd:YAG laser and to compare their healing processes by histological evaluation.

Both lingual sides of adults dogs were resected with Er:YAG laser or Nd:YAG laser by varying the output to be 1.5 W or 3 W. The animals were sacrificed after 1 week or 2 weeks, and tissues were obtained and examined histologically both macroscopically and under a light microscope. The following results were obtained:

1.No significant macroscopic differences between the groups irradiated with Er:YAG and Nd:YAG lasers were detected after 1 week or 2 weeks, and similar wound healing features were observed.

2.In the Er:YAG laser group, in comparison with the findings after 1 week, the histological defect size after 2 weeks was observed to be noticeably smaller.

3.The Er:YAG laser group showed narrower distributions of defect size, fibroblast proliferative activity, inflammation, and neova- scularization than the Nd:YAG laser group, although the differ- ences were not statistically significant.

Based on the above results, resections performed with an Er:YAG laser showed good healing features comparable to those observed for resections performed with a Nd:YAG laser, which has been used primarily for incisions in soft tissues. Thus, an Er:YAG laser may also be useful for the incision of soft tissues.