SCANNING ELECTRON-MICROSCOPIC ANALYSIS OF CANAL WALL DENTIN FOLLOWING NEODYMIUM-YTTRIUM-ALUMINUM-GARNET LASER IRRADIATION
SCANNING ELECTRON-MICROSCOPIC ANALYSIS OF CANAL WALL DENTIN FOLLOWING NEODYMIUM-YTTRIUM-ALUMINUM-GARNET LASER IRRADIATION
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DOI：
10.1016/s0099-2399(84)80264-2
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发表时间：
1984-01-01
影响因子：
4.2
通讯作者：
ZAKARIASEN, KL
中科院分区：
文献类型：
--
作者：
DEDERICH, DN;ZAKARIASEN, KL
5只上颌尖牙唇舌向劈开，清除根管凹陷。在一系列沿根管壁沿着均匀分布的位置，用倒锥形钻头将骨锉压平，形成小的圆形区域，用作靶位置。将样品储存在百里酚水溶液中，随后在激光发射前在5.25%NaOCl溶液中冲洗1分钟。将试样干燥，并用钕钇铝石榴石激光器从10至90 W和0.1至0.9进行激光照射。扫描电子显微镜分析表明，激光的影响，从没有影响到破坏涂抹层的实际熔化和重结晶的牙本质，这取决于这些因素，如功率水平，曝光时间，和颜色的牙本质。再结晶的根管壁牙本质似乎是无孔的和连续的性质，可以想象，表现出降低渗透性的液体。
Five maxillary canines were split labiolingually and the canal concavities were debrided. At a series of evenly spaced locations along the canal wall, the concavity was flattened by an inverted cone bur to form small circular areas to be utilized as target locations. The specimens were stored in a thymolwater solution and subsequently rinsed in a 5.25% NaOCl solution for 1 min before lasing. The specimens were dried and lased from 10 to 90 W and 0.1 to 0.9 with a neodymium-yttrium-aluminum-garnet laser. Scanning electron microscopic analysis showed the effects of lasing to vary from no effects to disruption of the smeared layer to actual melting and recrystallization of the dentin, depending on such factors as power level, duration of exposure, and color of the dentin. The recrystallized canal wall dentin appeared to be nonporous and continuous in nature and could conceivably demonstrate reduced permeability to fluids.