Read R P, Baumgartner J C, Clark S M
School of Dentistry, Oregon Health Sciences University, Portland 97201, USA.
J Endod. 1995 Jan;21(1):4-8. doi: 10.1016/S0099-2399(06)80548-0.
The effects of the Luxar LX-20 CO2 dental laser on resected apical root dentin were examined using stereomicroscopy and scanning electron microscopy. The surfaces of 2-mm-thick sections of dentin from freshly extracted human teeth were exposed to CO2 laser radiation. Fluences used ranged from 2.1 to 625.0 J/cm2. The effects of the laser energy on the dentin ranged from no visible effects, to charring, cracking, cratering, and glazing. The most dramatic effect was cracking. Cracking was evident on all specimens having any visible modification of the dentin. A prototype-curved laser tip was used and compared with a standard straight tip. The curved tip did not deliver laser energy to the dentin as efficiently as a straight tip. CO2 laser radiation did not consistently obliterate dentin tubules.
使用体视显微镜和扫描电子显微镜检查了Luxar LX - 20二氧化碳牙科激光对切除的根尖牙本质的影响。将新鲜拔除的人牙2毫米厚的牙本质切片表面暴露于二氧化碳激光辐射下。使用的能量密度范围为2.1至625.0 J/cm²。激光能量对牙本质的影响范围从无明显影响到碳化、开裂、形成凹坑和釉化。最显著的影响是开裂。在所有牙本质有任何可见改变的标本上都明显出现了开裂。使用了一个原型弯曲激光头并与标准直激光头进行比较。弯曲激光头向牙本质传递激光能量的效率不如直激光头。二氧化碳激光辐射并没有始终如一地封闭牙本质小管。
