论文部分内容阅读
研究了调Q Er:YAG激光消融离体牙本质过程中水雾的作用及其对消融后牙本质微结构的影响。调Q Er:YAG激光重复频率为3 Hz,脉冲宽度为62ns,作用脉冲数为10,能量范围为4~70 mJ,水雾流量分别为0,4,9,13mL/min时消融牙本质。每种实验条件下消融10个牙本质样品,利用扫描电镜观察消融坑洞微结构。实验结果表明,随着水雾流量的增加,调Q Er:YAG激光对人牙本质的消融阈值呈逐渐增加的趋势,牙本质所受机械损伤减小。实验结果对了解调Q Er:YAG激光消融牙硬组织的微观结构及牙科治疗应用具有参考价值。
The effect of Q-switched laser with QAG laser ablation on isolated dentin and its effect on dentin microstructure after ablation were investigated. The modulation Q Er: YAG laser repetition rate of 3 Hz, the pulse width of 62ns, the number of pulses of 10, the energy range of 4 ~ 70 mJ, mist flow at 0,4,9,13mL / min ablation of dentin. Under each experimental condition, 10 dentin samples were ablated, and the microstructure of the ablation hole was observed by scanning electron microscopy. Experimental results show that with the increase of water mist flow, the Q-switched Er: YAG laser shows a gradual increase in ablation threshold of human dentin, and mechanical damage to dentin decreases. The experimental results of the Q = Q: YAG laser ablation of the microstructure of the microstructure and dental treatment has reference value.