Dentin ablation by Ho: YAG laser: correlation of energy versus volume using stereophotogrammetry.
Dentin ablation by Ho: YAG laser: correlation of energy versus volume using stereophotogrammetry.
复制标题
Ho: YAG 激光牙本质消融：使用立体摄影测量法测量能量与体积的相关性。
DOI：
10.1016/s0099-2399(06)80287-6
复制
发表时间：
1994
影响因子：
4.2
通讯作者：
Silverton,SF
中科院分区：
文献类型：
--
作者：
Stevens,BH;Trowbridge,HO;Harrison,G;Silverton,SF
激光在牙髓学中的未来应用取决于可预测和持续的牙本质消融。在这项初步研究中，我们使用Ho:YAG激光光纤传输系统将激光能量应用于体外制备的牙齿切片。纵向切片的单根人类牙齿在焦距为1 mm的单能量脉冲下承受25至1750 mJ的脉冲。在不同的能量水平上，我们观察到牙本质表面的变化，从微小的表面凹陷到大陨石坑的形成。采用扫描电镜和立体摄影测量法测定牙本质所受能量与牙本质消融程度之间的关系。牙本质陨石坑的形成通过确定产生的陨石坑的表面积、深度和体积来量化。激光能量的增加与在150到1200 mJ范围内产生的陨石坑的表面积、深度和体积的增加进行了比较。在本研究中使用的Ho:YAG激光光纤传输系统提供了一种有效的牙本质消融手段。三维立体摄影测量可能是进一步研究激光能量对矿化组织影响的一种有用方法。
The future use of lasers in endodontics is dependent upon predictable and consistent ablation of dentin. In this pilot study we used an Ho:YAG laser fiberoptic delivery system to apply laser energy to prepared tooth sections in vitro. Longitudinally sectioned single-rooted human teeth were subjected to single-energy pulses varying from 25 to 1750 mJ at a focal length of 1 mm. At different energy levels we observed changes in the dentin surface ranging from minute surface pitting to the formation of large craters. Scanning electron microscopy and stereophotogrammetry were used to determine the relationship between the amount of energy applied to dentin and the extent of dentin ablation. Dentin crater formation was quantified by determining surface area, depth, and volume of craters produced. Increases in laser energy were compared with increases in surface area, depth, and volume of craters produced within the range of 150 to 1200 mJ. The Ho:YAG laser fiberoptic delivery system used in this study provides an effective means of ablating dentin. Three-dimensional stereophotogrammetry may prove to be a useful method for further studies on the effects of laser energy on mineralized tissues.