Application of Erbium: YAG Laser for cavity preparation of metal inlay

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The dental Er:YAG laser which is mainly used for dental hard tissue cutting has been newly developed. In restorative denstry, this laser usually has been used in composite resin restoration, but not for cast metal inlay restoration. This is because it is difficult to make the cavity form, such as retention form and convenience form, by using laser irradiation. At 6^<th> ISLD meeting we reported an experimental chisel shaped contact tip (ESCS TIP) for use in cavity preparation for cast metal inlay. In this study we examine newly developed modified experimental tip in inlay cavity preparation using an Erwin(ML22:HOYA & MORITA).This tip is composed of arranging of 7 optical fibers having 0.2 or 0.3mm diameter at single row. The tooth cutting efficacy of this tip was examined using extracted human and bovine teeth, and the irradiated sites were observed with SEM. The cutting efficacy of the experimental tip for both enamel and dentin was better than that of the ECSC tip. It is suggested that inlay cavity preparation is possible using Erwin with this tip. The purpose of this study was to elucidate.