微波照射对牙本质晶体结构影响的研究

Effect of Microwave Irradiation on Crystallographic Structure of Human Dentin

目的:研究微波照射对人离体牙牙本质晶体结构的影响。方法:选取7对同名前磨牙,每对同名牙按照实验要求制备成4个试件,并将其随机分为4组,对照组不做任何处理,处理组分别用40W微波照射牙本质面3s、5s和7s后,应用X射线衍射方法检测全部牙本质试件的晶体结构。结果:牙本质的主要物相组成为羟基磷灰石。与对照组相比较,微波照射后的牙本质的晶体结构趋向于结晶度更高的羟基磷灰石。且随着照射时间的延长,作用效果更显著。结论:微波照射对牙本质的晶体结构有影响,使牙本质的晶体结构趋于更稳定。

Objective： To investigate the effect of microwave irradiation on crystallographic structure of human dentin. Methods： 7 pairs of premolars were extracted for orthodontic purpose. Each pair of them were prepared 4 specimens and they were randomly divided into 4 groups. They were treated by microwave for Os, 3s, 5s or 7s respectively. Then the crystallographic structure were analyzed by XRD. Results： The XRD diffraction patterns of the dentin were identified as hydroxyapatite. Compared with the control group which were not treated with microwave , the irradiated groups showed sharper peaks on the diffraction patterns. And the more time the dentine treated with microwave, the sharper peaks it showed. Conclusion： These observations suggest that microwave contribute to the changes in crystallographic properties . And the dentine get better crystallographic structure after microwave irradiation.