Williams D L, Tsamtsouris A, White G E
J Dent Res. 1978 Jan;57(1):31-5. doi: 10.1177/00220345780570011401.
Electrical resistance of the tooth was measured through the dental pulp by a relatively simple method. The primary resistance is in the enamel, and the total resistance drops severalfold as dental caries develop. This resistance has been measured on the occlusal surfaces of 122 teeth of children. The differences between explorer categories showed statistically different resistance values (P greater than 0.9995, excluding the offscale sound-tooth category). After 3 to 4 months, 9 of the 32 teeth of the incipient caries category became obviously carious, while none of the caries-free teeth became carious.
通过一种相对简单的方法，经牙髓测量牙齿的电阻。主要电阻存在于牙釉质中，随着龋齿的发展，总电阻会下降数倍。已在儿童的122颗牙齿的咬合面上测量了这种电阻。探查类别之间的差异显示出具有统计学差异的电阻值（P大于0.9995，不包括超出范围的健康牙齿类别）。3至4个月后，初期龋齿类别的32颗牙齿中有9颗明显龋坏，而无龋牙齿均未龋坏。
