低磷血症性维生素D抵抗性佝偻病患者乳牙的结晶度

The crystallinity of human deciduous teeth in hypophosphataemic vitamin D-resistant rickets.

作者信息

Abe K, Ooshima T, Sobue S, Moriwaki Y

机构信息

Department of Pedodontics, Osaka University Faculty of Dentistry, Japan.

出版信息

Arch Oral Biol. 1989;34(5):365-72. doi: 10.1016/0003-9969(89)90110-6.

DOI:10.1016/0003-9969(89)90110-6

PMID:2556984

Abstract

Five teeth were obtained from three patients with hypophosphataemic vitamin D-resistant rickets (HVDRR) and five corresponding sound teeth from five healthy children. According to powder X-ray diffraction analysis, the half-peak breadths of (310) and (002) reflections of HVDRR dentine were smaller than those of normal dentine. Splitting fractions obtained from i.r. spectral analysis of HVDRR dentine powder were larger than those of normal. Microbeam X-ray diffraction analysis showed that the relative half-peak breadths of globular dentine in ground sections of HVDRR teeth were smaller than those of normal circumpulpal dentine. Transmission electron microscopy demonstrated that the hydroxyapatite crystals of globular dentine in HVDRR teeth were larger than those of normal dentine. Thus the crystallinity of deciduous tooth dentine in HVDRR was greater than that of normal dentine, mainly because of the large hydroxyapatite crystals in HVDRR globular dentine.

摘要

从三名低磷性维生素D抵抗性佝偻病（HVDRR）患者身上获取了五颗牙齿，并从五名健康儿童身上获取了五颗相应的健康牙齿。根据粉末X射线衍射分析，HVDRR牙本质（310）和（002）反射的半峰宽小于正常牙本质。从HVDRR牙本质粉末的红外光谱分析获得的分裂分数大于正常牙本质。微束X射线衍射分析表明，HVDRR牙齿磨片的球状牙本质的相对半峰宽小于正常牙髓周围牙本质。透射电子显微镜显示，HVDRR牙齿球状牙本质的羟基磷灰石晶体大于正常牙本质。因此，HVDRR乳牙牙本质的结晶度高于正常牙本质，这主要是因为HVDRR球状牙本质中存在大的羟基磷灰石晶体。