The author examined the clinical and histological changes on the dorsal ?tongue mucosa of adult S W
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rats after lasing by pulsed Nd:YAG laser. The dorsal tongue was lasgd for 3 seconds by 1.5, 2.0, 2.5, 3.0, 3.5, UP and 10, 15, 20, 30pps. After ´tissue changes were observed clinically, the excised samples were observed hi and the width of tissue destruction was analyzed quantitatively under the?Confocal laser.microscope
The following results were obtained:
1. Whitening of peripheral tissue was observed more as increasing pulses per second (Hz) below power 2.5W ad observed at all parameters above power 3.0W.
2. Charring of mucosal surface was observed at all parameters but mild at parameters below power 2.0W.
3. The destruction of epithelium was observed at all parameters and tissue destruction was extended to lamina propit at higher pulses per second.
4. The width of tissue destruction was more widening as increasing energies per pulse (p<0.01) and the narrowat at 20Hz than 10Hz, 15Hz and 3OHz(p<0.05).
As the above results, author suggests power below-3.5W and 20Hz as the lasing parameters for oral soft tissut therapy.
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