Abstract
We compared the denaturation image of the enamel surface by observation of the SEM observation in with black ink material for the laser reaction and in with substitution use of HY Cement.
The summary of the result is as follows.
1. Under all the conditions of irradiation, use of black ink use and use of the substitution HY Cement were clearly different according to the denaturation condition of enamel surface.
2. With the use of black ink material use, the structure like lave which causes the efficiency of the acid resistant activity of the enamel and forming of cracks were observed with throughout.
3. With substitution of Nd: YAG laser adsorption instead of HY Cement which was originally used for lining and temporary sealing, obviously could not give the same range of denaturation as black ink material.
