人牙本质的动电效应研究  

Streaming potential in human dentin

作　　者：冯祖德[1] 王婷[1] 许彬彬[2] 姚荣迁[1] 

机构地区：[1]厦门大学材料学院,厦门361005 [2]厦门大学纳米科技中心,厦门361005

出　　处：《医用生物力学》2008年第4期257-261,共5页Journal of Medical Biomechanics

基　　金：国家自然科学基金资助项目(30470434)

摘　　要：目的探讨人牙本质的流动电位现象,初步考察其影响因素。方法利用实验室自制的微型动态加载装置,结合应变仪和材料力学性能试验机,建立流动电位连续测量系统,测量人牙本质在模拟人体生理环境的介质中的流动电位,并研究不同的加载频率(0.2、0.1、0.05Hz)和牙试样上人为引入的小通孔对于流动电位的影响。结果人类牙本质呈现流动电位效应,载荷频率越高,测得的流动电位越大。这是因为频率越高,液体通过牙本质小管的流速越快,样品上下表面的压力差值越大,使流动电位增大。并且样品上人为钻一个小通孔(模拟龋齿)会使其流动电位峰值减小。结论人类牙本质具有动电效应,并且加载频率越高流动电位越高,在相同加载频率下引入小通孔样品的流动电位较低。Objective To reveal the streaming potential in human dentin and the related influencing factors. M ethod Fresh human third molars without visible evidence of caries were used in this investigation. A cell was designed and manufactured for facilitating the measurement of steaming potential in human dentin under a simulated physiological condition. A system including the cell, a mechanical testing machine, a scanner and a personal computer was established for cyclic loading and data acquisition. The streaming...

关 键 词：人牙本质 动电效应 频率 

分 类 号：R318.01[医药卫生—生物医学工程]