Rauhamaa-Mäkinen R, Meurman J H, Luomanen M, Torkko H, Viherkoski E, Paunio I
Department of Cariology, University of Helsinki, Finland.
Scand J Dent Res. 1991 Dec;99(6):470-5. doi: 10.1111/j.1600-0722.1991.tb01056.x.
Extracted third molars were used to study the effect of Nd:YAG laser irradiation combined with CO2 laser beam on dental hard tissues. The specimens were studied with SEM after lasing and the size of the impact areas and beam penetration into enamel and dentin were planimetrically analyzed. High-energy CO2 laser (e.g. 10 s irradiation with 10 W output energy) penetrated all enamel and dentin. The simultaneous addition of Nd:YAG irradiation to the CO2 beam was found to increase the effect of CO2 laser, while Nd:YAG irradiation alone, used with equivalent energy densities, did not cause any effect on enamel surface. Thus, Nd:YAG laser was found to potentiate statistically significantly the effect of CO2 irradiation, but the morphologic alterations on dental hard tissues, such as crater formation at the beam focus site, appeared to be due to CO2 irradiation alone.
提取的第三磨牙用于研究钕钇铝石榴石（Nd:YAG）激光照射联合二氧化碳（CO2）激光束对牙齿硬组织的影响。激光照射后，通过扫描电子显微镜（SEM）对标本进行研究，并对冲击区域的大小以及光束在釉质和牙本质中的穿透情况进行平面测量分析。高能CO2激光（例如，输出能量为10 W照射10秒）可穿透所有的釉质和牙本质。研究发现，在CO2光束中同时添加Nd:YAG照射可增强CO2激光的效果，而单独使用能量密度相当的Nd:YAG照射对釉质表面没有任何影响。因此，发现Nd:YAG激光在统计学上显著增强了CO2照射的效果，但牙齿硬组织上的形态学改变，如光束聚焦部位的坑洼形成，似乎仅归因于CO2照射。
