Dostálová T, Jelínková H, Kucerová H, Krejsa O, Hamal K, Kubelka J, Procházka S
Institute of Dental Research, Prague, Czech Republic.
J Clin Laser Med Surg. 1998 Oct;16(5):273-82.
The aim of this study is to evaluate the quality of laser ablation in comparison with the classical drilling preparation.
For the experiment, the Er:YAG laser drilling machine was used. The system had a laser head, water cooler, and power supply with automatic control. Spot size of 300-350 microns was used for the preparation. Repetition rate of 1-4 Hz, and pulse energies of 100-400 mJ with water spray were chosen. Cavity shape in comparison with classical drill, time of preparation, and influence of cavity shape on filling materials retention in accordance with the U.S. Public Health Service System were used. The evaluation criteria for noncontact Er:YAG ablation were done.
The cavity shape is irregular, but spot surface has larger area and microretentive appearance. Caries of enamel and dentin were treated with a noncontact preparation. It was possible to remove the old insufficient fillings, except for amalgam or metal alloys. The average number of pulses was 111.22 (SE 67.57). Vibrations of microexplosions during preparation were felt by patients on 14 cavities; however, nobody felt unpleasant pain. The qualities of filling materials in laser cavities were very stable; however, cavo surface margin discoloration of 82-86% of Alfa rating could be a problem. Changes of the color and anatomic form of the tooth were observed in 4-8%.
In comparison with the classical treatment, it could be said that the retention and quality of filling materials is the same or very similar.
本研究旨在评估激光消融与传统钻孔预备相比的质量。
实验使用铒：钇铝石榴石激光钻孔机。该系统有一个激光头、水冷器和带自动控制的电源。预备时使用的光斑尺寸为300 - 350微米。选择1 - 4赫兹的重复频率和100 - 400毫焦的脉冲能量并喷水。根据美国公共卫生服务系统，比较与传统钻头相比的洞形、预备时间以及洞形对充填材料固位的影响。制定了非接触式铒：钇铝石榴石消融的评估标准。
洞形不规则，但光斑表面面积较大且有微固位外观。采用非接触式预备治疗釉质和牙本质龋。除汞合金或金属合金外，有可能去除旧的不足充填物。平均脉冲数为111.22（标准误67.57）。14个洞在预备过程中患者感觉到微爆炸的震动；然而，没有人感到不适疼痛。激光预备洞中的充填材料质量非常稳定；然而，82 - 86%的阿尔法评级的洞缘变色可能是个问题。观察到4 - 8%的牙齿颜色和解剖形态发生变化。
与传统治疗相比，可以说充填材料的固位和质量相同或非常相似。
