Exchange of Nd: YAG Laser Irradiation and Damage of Microvascularization on the Rats Lingual Dorsum
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概要
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The purpose of this study was to examine the depth into penetration of the tissue and the circulatory structure of the microvasculature after irradiation the Nd: YAG laser on the lingual dorsum of a 9-week-old male wistar rat.<BR>The Nd: YAG laser was irradiated against the tongue of rats under the following condition; the energy level; 1, 2 and 3-Watts for 1.0, 2.0 and 3.0 seconds.<BR>Wounds of tongue were observed macroscopically, microscopically and also examined by SEM. The following results were obtained; Microscopical findings: The penetration was observed until the lamina propria in 1W1S and 1W2S groups<BR>The penetration of 1W3S, 2W2S and 3W1S groups were observed still superior tranversus linguae layer and also were observed in the muscle layer for 3 second group.<BR>SEM findings: The capillary loops of the papillae and the lamina propria venure networks were damaged in 1W1S and 1W2S groups.<BR>Irradiation wounds disappeared in the capillary loops of the papillae and the lamina propria venure networks.<BR>In 1W3S, 2W2S and 3W1S groups, and also disappeared in the capillaries of muscle layer in 3 second groups.<BR>(J. Jpn. Soc. Laser Dent. 8: 7-15, 1997 Reprints request to Dr. MATSUMOTO)
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