There are various new surgical methods which utilize physical energy. They have different features one another. For understanding of feature of each new method we made macro and microscopic examinations of the tongue of adult healthy dogs after each treatment with these methods. The specimens are examined at immediately after treatment, and 1, 2, 3 and 4 weeks after the treatment. These therapies are cryosurgery, bipolar coagulator method, infrared coagulator method, ultrasonic aspirator method, CO
2LASER surgery, and NdYAG LASER surgery.
Immediately after cryosurgery, we recognized redness, swelling, and induration, and under a microscope there were many intrastructual gaps from the mucous membrane to the muscular layer. We found tissue defect or deep excavation 1week after, and re-epithelization occured in 2 weeks.
After bipolar and infrared coagulator methods, coagulation necrosis was remarkable, by which we could stop bleeding. Re-epitelization was found after 1 to 2 weeks.
Abration, tissue defect and coagulation necrosis were recognized immediately after ultrasonic aspiration method. Tissue defect reached the muscular layer at a high output. Re-epithelization began in 2 weeks.
At a small output and short radiating time of Nd-YAG LASER surgery, we found coagulation, and carbonization of the tissue, wheras tissue defect were remarkable at a high output and long radiating time. The tissue defect resulted in a large defect or perforation 1 week later, to that we must pay attention on clinical use. Re-epitelization was seen in 2weeks.
Immediately after CO
2 LASER surgery, carbonization and tissue defect increased its sphere according to the amount of output and radiating time. Re-epitelization occured a week later.
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