Huang A, Nakagaki H, Tsuboi S, Ji H, Ohno N, Chen R, Nguyen T T, Kim J B
Department of Preventive Dentistry and Dental Public Health, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Arch Oral Biol. 1998 Sep;43(9):669-77. doi: 10.1016/s0003-9969(98)00059-4.
Twenty-five premolars (from Nagoya, Japan < 0.1 parts/10(-6)F in drinking water) were sampled to determine the fluoride content in imbrication lines of Retzius between the grooves and ridges of perikymata on the enamel surface. Eight small windows were formed on each surface in groove and ridge regions using an etched microsampling technique. By using a regression curve, y = ax(-b), fluoride concentrations were compared at depths of 1, 3, 5, 10, 20, 30 and 50 microm in the perikymata regions. Fluoride concentrations increased gradually from the age of 10 to 12 years on the premolar surfaces, but were significantly higher in 12-year-olds or older (erupted teeth) than in 10-year-olds or younger (unerupted teeth). No obvious difference in fluoride concentrations was found between males and females. In the outermost enamel ( < 5 microm depth), fluoride concentrations were significantly higher in the grooves than the ridges of the perikymata. Comparison of the exponential regression coefficients (-b) of the fluoride profiles showed a significant difference between the grooves and ridges. It was concluded that fluoride concentrations and profiles were higher in grooves than in ridges of perikymata, probably because they are naturally porous and are stagnation areas attracting dental plaque.
选取了25颗前磨牙（来自日本名古屋，饮用水中氟含量<0.1 ppm），以测定牙釉质表面釉小皮嵴与沟之间芮氏线中的氟含量。使用蚀刻微量取样技术在每个表面的沟和嵴区域形成8个小窗口。通过使用回归曲线y = ax（-b），比较了釉小皮区域中深度为1、3、5、10、20、30和50微米处的氟浓度。前磨牙表面的氟浓度从10岁到12岁逐渐增加，但12岁及以上（已萌出牙齿）的氟浓度明显高于10岁及以下（未萌出牙齿）。男性和女性之间的氟浓度没有明显差异。在最外层牙釉质（深度<5微米）中，釉小皮沟中的氟浓度明显高于嵴。氟分布的指数回归系数（-b）在沟和嵴之间存在显著差异。得出的结论是，釉小皮沟中的氟浓度和分布高于嵴，可能是因为它们天然多孔，是吸引牙菌斑的滞留区域。
