Hoppenbrouwers P M, Driessens F C, Borggreven J M
J Dent Res. 1986 Jul;65(7):955-8. doi: 10.1177/00220345860650071101.
Crowns and roots of human molars, the roots from which had not been exposed to the oral environment, were exposed for 0, 3.5, 7, and 14 days to buffer solutions which were undersaturated or supersaturated with respect to hydroxyapatite. Densitometric measurements on contact-microradiograms of transverse sections of the crowns and of the cervical parts of the roots yielded plots of the mineral content as a function of the distance to the outer surface. From these plots, the rate of demineralization was calculated. It was found that the mineral of the roots dissolved even in buffer solutions which were supersaturated with respect to hydroxyapatite. Comparison of the results obtained from the crowns with those from the roots showed that the root hard tissues were more vulnerable to demineralization than was the dental enamel.
将人磨牙的牙冠和牙根（牙根未暴露于口腔环境）分别置于相对于羟基磷灰石不饱和或过饱和的缓冲溶液中0天、3.5天、7天和14天。对牙冠横切面和牙根颈部横切面的接触式显微放射照片进行密度测量，得出矿物质含量随距外表面距离变化的曲线。根据这些曲线计算脱矿速率。结果发现，即使在相对于羟基磷灰石过饱和的缓冲溶液中，牙根的矿物质也会溶解。将牙冠和牙根的实验结果进行比较，发现牙根硬组织比牙釉质更容易脱矿。
