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

我们从研究中得到了以下结果。对日本变色牙和彩色牙的分布进行了调查。我们还调查了与年龄或四环素抗生素产量变化的关系。在接受咨询的258例患者中，没有发现分布范围的区域差异。许多患者出生在四环素产量大的1960年代后期，因此发现产生量与患者的年龄分布相对应。虽然说四环素的使用会导致牙齿变色，但很明显，四环素溶液对羟基磷灰石的作用粘附在磷灰石上，而且发现紫外线照射四环素粘附剂会显著降低磷灰石的亮度。用塞曼原子吸收光度计分析永久性变色牙齿，发现铁（Fe）和镁（Mg）含量明显降低，z…More inc含量明显升高。将牙釉质外层分为有色部分和透明部分进行氨基酸分析，结果显示Glu、Ala、Tyr等氨基酸成分不同，来源于细菌的D体比例较大，参与着色的菌群也存在差异。根据对变色牙齿实际情况的调查结果对变色牙齿进行颜色分类，并在模型材料中再现变色牙齿的颜色。然后，以彩色模型材料为底色，利用CAD/CAM系统制作的beneer对颜色的屏蔽效果进行了评价。这种方法在表现变色牙齿的自然颜色时非常有用。为了再现变色牙齿所具有的局部着色和微妙的明暗颜色，在着色防火模型中结合耐热彩笔的装饰方法，可以实现精细着色，使色彩表现更加容易。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