摘要
为激光照射技术在临床牙齿疾病治疗中的应用提供理论依据,采用Crank-Nicolson有限差分法,求解热传导方程,模拟了Nd:YAG脉冲激光照射牙齿温升过程,研究了脉冲波形(矩形波、左三角波、正三角波、右三角波和高斯波等)对温升过程的影响.结果表明:矩形波照射时,牙齿表面温度最高,牙髓温度最低;高斯波照射时,牙齿表面温度最低,牙髓处温度最高.随着激光能量密度增大,不同波形照射引起的牙齿表面温差增大,牙髓温差减小.给出了5种波形照射牙齿表面时能量阈值.
For giving a basis for clinical treatment of dental diseases by laser radiation, based on the Crank-Nieolson finite difference, the temperature distribution varying with the time of the tooth was simu- lated by heat conduction equation. The influence of the pulse waveforms （rectangular waves, left triangu- lar waves, isosceles triangle waves, right triangular waves and Gaussian waves etc. ） on the temperature distribution of the tooth is investigated. The results show that the tooth surface temperature is the maxi- mum, and the dental pulp temperature is the minimum radiated by laser with rectangular wave. If it is ra- diated by laser with Gaussian wave, the tooth surface temperature is the minimum, and the dental pulp temperature is the maximum. The temperature difference increases at the tooth surface and decreases at dental pulp radiated by laser with different waveforms. The energy thresholds are given radiated by five types of waveforms.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2013年第5期464-467,共4页
Journal of Hebei University(Natural Science Edition)
基金
973计划前期研究专项资助项目(2011CB612305)
河北省自然科学基金资助项目(E2012201035
2011201134)
河北大学自然科学研究计划项目(2013-252)
关键词
脉冲波形
牙齿
温度分布
pulse types
tooth
temperature distribution
