Abstract
In therapeutic application of lasers' thermal analysis of tissues with the laser-treatment it is extremely important to know the effect and the area of the lasers on tissues. The authors have examined experimentally the thermal effects and the light distribution of Nd: YAG laser on the alveolar bone in the periodontal laser surgery using the author's original simulative system. As the results this method has been proved to be useful to predict both the therapeutic effect and the thermal damage on per tissues with its laser treatment. In addition to this bone healing effect of Nd: YAG laser in its periodontal surgery,it was confirmed to make a little damage in such a weak range of the laser exposure.
