Michelich V, Pashley D H, Whitford G M
J Dent Res. 1978 Nov-Dec;57(11-12):1019-24. doi: 10.1177/00220345780570110301.
Two independent techniques (filtration and surface tension) were developed to measure the functional tubular radii of 11 dentin and 2 glass discs. Anatomic radii were determined using SEM for comparative purposes. The functional radii of the dentin discs ranged from 5 to 40% of the anatomic radii. This differences was due to the fact that SEM visualizes only the surface while the functional techniques measure the radii within dentin tubules. It is concluded that the functional methods are preferred whenever the dynamics of fluid flow through dentin are under consideration.
开发了两种独立的技术（过滤和表面张力）来测量11个牙本质盘和2个玻璃盘的功能性管状半径。为了进行比较，使用扫描电子显微镜（SEM）确定解剖学半径。牙本质盘的功能性半径范围为解剖学半径的5%至40%。这种差异是由于扫描电子显微镜仅显示表面，而功能性技术测量的是牙本质小管内的半径。得出的结论是，每当考虑流体通过牙本质的流动动态时，功能性方法更为可取。
