Delmé K, Meire M, De Bruyne M, Nammour S, De Moor R
Service de Dentisterie Opératoire et d'Endodontie Université de Liège, Quai Godfroid Kurth, 45 4020, Liège.
Rev Belge Med Dent (1984). 2009;64(2):71-80.
Many lasers (i.e., different wavelengths) are available today for clinical applications. Not all lasers are to be used for cavity preparation and removal of carious tissues. Erbiumlasers (Er:YAG and Er,Cr:YSGG) are suitable for these purposes (the wavelengths coincide with the highest absorption peaks of water and hydroxyapatite). The advantages during cavity preparation and caries removal are smear layer free cavity walls, selective and localised removal of tooth substance, a restricted need or the absence of anaesthesia, and cavity walls with a higher acid resistance resulting in a better protection against secondary decay. Possible side effects of erbium lasers with water cooling and used with respect for correct power setting are minimal and can be compared with those of rotary instruments. Erbium laser tooth preparation is now one of the options in the minimal invasive approach. The needs for acid etching has been debated for long. At present it has become clear that acid etching is mandatory to obtain a good adhesion and retention with resin composites.
如今有许多种激光（即不同波长）可用于临床应用。并非所有激光都用于窝洞制备和龋坏组织的去除。铒激光（铒：钇铝石榴石激光和铒铬：钇钪镓石榴石激光）适用于这些目的（其波长与水和羟基磷灰石的最高吸收峰一致）。窝洞制备和龋坏去除过程中的优点包括窝洞壁无玷污层、牙体组织选择性和局限性去除、局部麻醉需求受限或无需麻醉，以及窝洞壁具有更高的耐酸性，从而能更好地防止继发龋。水冷铒激光在正确设置功率的情况下，其可能的副作用极小，可与旋转器械的副作用相比较。铒激光牙齿制备如今是微创治疗方法中的选择之一。酸蚀的必要性长期以来一直存在争议。目前已经明确，酸蚀对于获得树脂复合材料良好的黏附力和固位力是必不可少的。
