Actual situations of dental malformation and discoloration and coloration and their treatment

我们通过研究获得了以下结果。调查了变色和有色牙齿在日本的分布情况。我们还调查了与年龄或四环素类抗生素产量变化的关系。在接受咨询的258名患者中，没有发现分布范围的地区差异。许多患者出生在1960年后期，当时四环素的产量很大，从而发现产量与患者的年龄分布是一致的。虽然四环素的使用被认为会导致牙齿变色，但很明显，四环素溶液对羟基磷灰石的作用与磷灰石粘着在一起，而且发现四环素粘附剂的紫外线照射显著降低了磷灰石的亮度。此外，用塞曼原子吸收光谱仪对永久变色的牙齿进行了分析，发现铁(Fe)和镁(Mg)减少，z…减少More Inc.大幅增长。氨基酸分析结果表明，牙釉质外层分为着色部分和透明部分，氨基酸组成不同，谷氨酸、丙氨酸、酪氨酸等氨基酸组成不同，细菌来源的D小体所占比例较大，参与着色的细菌菌群也不同。变色牙齿的颜色分类是根据变色牙齿的听觉状况调查结果进行的，并在模型材料中再现颜色。在此基础上，以彩色模型材料为背景，利用CAD/CAM系统制作了遮色板，对遮色效果进行了评价。这种方法在表达自然颜色时非常有用，其中融合了变色牙齿的颜色。为了再现变色牙齿所具有的局部着色和微妙的明暗度，当通过耐热彩色铅笔的装饰方法组合在着色耐火模型中时，可以进行精细的配色并且颜色表达变得更容易。较少

We obtained the following results from the study. The distribution of discolored and colored teeth in Japan was investigated. We also investigated the relationship to age or to the shift in the amount of tetracycline antibiotics produced. No regional differences in the distribution range were found in 258 patients who were consulted. Many patients were born in the later period of 1960 when the production of tetracycline was large, and it was thus found that the production amount and patients' age distribution corresponded to each other. Although the use of tetracycline is said to cause discolored teeth, it became clear that the action of tetracycline solution on hydroxyapatite adheres to apatite, Moreover, it was found that ultraviolet irradation on tetracycline adhesion reagents significantly reduced the brightness of apatite. Moreover, permanently discolored teeth were analyzed by a Zeeman atomic absorption photometer, and it was found that iron (Fe) and magnesium(Mg) decreased and z … More inc increased significantly. The results of the analysis of aminoacids, in which the dental enamel outer layers were divided into colored part and transparent part, showed that amino-acid components such as Glu, Ala, and Tyr were different, and the proportion of D body derived from bacteria was large, as well as difference of bacterial flora involved in the coloration. Color classification of discolored teeth was conducted from the results obtained in surveys of acual situations of discolored teeth and the color was reproduced in model materials. Then, we evaluated color-shielding effects by beneer made by a CAD/CAM system with a color model material as a background color. This method is very useful in expressing natural color in which the color of discolored teeth is integrated. To reproduce a partial coloration and subtle lightness and darkness of color which discolored teeth have, a fine corolation becomes possible and color expression becomes easier when an ornament method by a heat-resisting color pencil is combined in a coloring fire-resisting model. Less