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

牙科Er:YAG激光器是近年来发展起来的一种主要用于牙科硬组织切割的激光器。在修复牙科中，这种激光通常用于复合树脂修复，而不是用于铸造金属镶嵌体修复。这是因为用激光照射很难使腔体形成保留腔体和方便腔体。在6^< > ISLD会议上，我们报道了一种用于铸造金属镶嵌体空腔制备的实验性凿形接触尖端（ESCS tip）。在这项研究中，我们研究了使用Erwin（ML22:HOYA & MORITA）制备镶嵌腔的新开发的改良实验尖端。该尖端由7根直径为0.2或0.3mm的光纤单排排列而成。用拔出的人牙和牛牙考察了该尖端的切牙效果，并对辐照部位进行了扫描电镜观察。实验尖对牙本质和牙釉质的切割效果均优于ECSC尖。建议使用该尖端的Erwin制备嵌体腔是可能的。本研究的目的是阐明。

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.