Larsen M J, Fejerskov O
Scand J Dent Res. 1978 Sep;86(5):337-45. doi: 10.1111/j.1600-0722.1978.tb00636.x.
The structural changes in human enamel during exposure to an acetate buffer, pH 4, containing 150 parts/10(6) fluoride have been studied using scanning electron microscopy and polarized light microscopy. After exposure for 2 h the enamel surface was covered by a fine-granular layer of calcium fluoride. The underlying enamel was highly eroded with an increased pore volume in the outer layer. Following an equilibration period of 3 months the uptake of fluoride in the apatite lattice had resulted in a highly mineralized, 100-micrometer-thick surface layer rich in fluoride covering a subsurface porous zone with an unchanged fluoride content. The deeply located, caries-like porous zone may have provided calcium and phosphate for saturation of the liquid.
利用扫描电子显微镜和偏光显微镜研究了人牙釉质在暴露于pH值为4、含有150 ppm氟化物的醋酸盐缓冲液中的结构变化。暴露2小时后，牙釉质表面覆盖着一层细小颗粒状的氟化钙。其下方的牙釉质被高度侵蚀，外层孔隙体积增加。经过3个月的平衡期后，磷灰石晶格中氟化物的吸收导致形成了一个高度矿化、厚度为100微米、富含氟化物的表面层，覆盖着一个氟化物含量不变的亚表面多孔区域。位于深部的、类似龋齿的多孔区域可能为液体的饱和提供了钙和磷酸盐。
