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

牙齿畸形变色的实际情况及其治疗

基本信息

批准号：
11307045
负责人：
HIRAI Yoshito
金额：
$ 24.04万
依托单位：
TOKYO DENTAL COLLEGE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

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

我们从研究中获得了以下结果。调查了日本变色牙和着色牙的分布情况。我们还调查了与年龄或四环素抗生素产生量变化的关系。258例患者的分布范围无地区差异。许多患者出生于四环素生产量较大的1960年后期，因此发现生产量与患者年龄分布相对应。虽然四环素的使用据说会导致牙齿变色，但很明显，四环素溶液对羟基磷灰石的作用会粘附到磷灰石上。此外，发现紫外线照射四环素粘附试剂会显著降低磷灰石的亮度。此外，通过塞曼原子吸收光度计分析永久变色的牙齿，发现铁（Fe）和镁（Mg）减少，z ...更多信息 inc显著增加。将牙釉质外层分为着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，细菌来源的D体比例较大，着色所涉及的细菌植物群也不同。根据变色牙的实际情况调查结果进行变色牙的颜色分类，并在模型材料中再现颜色。然后，我们评估颜色屏蔽效果的beneer由CAD/CAM系统与颜色模型材料作为背景颜色。这种方法在表达自然颜色，其中变色牙齿的颜色是非常有用的。为了再现变色牙齿所具有的局部着色和颜色的微妙的明暗，当在着色耐火模型中结合耐热彩色铅笔的装饰方法时，精细的着色变得可能，并且颜色表达变得更容易。少