| 釉质发育不全乳牙的超微形态研究 |
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| 引用本文： | 郑树国,邓辉,高学军,曹采方.釉质发育不全乳牙的超微形态研究[J].北京大学学报(医学版),1997(3). |
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| 作者姓名： | 郑树国 邓辉 高学军 曹采方 |
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| 作者单位： | 北京医科大学口腔医院儿童牙科!100081(郑树国，邓辉)，北京医科大学口腔医院儿童牙科牙体牙髓科!100081(高学军)，北京医科大学口腔医院儿童牙科牙周科!100081(曹采方) |
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| 摘 要： | 目的：观察不同类型乳牙釉质发育不全的超微表面形态，分析其在分类、致病机制、龋齿易感性中的意义。方法：将发育不全的乳牙固定脱水，临界点干燥，喷金镀膜，日立S－450扫描电子显微镜观察，加速电压20kV。结果：发育不全釉质中存在不同程度形态缺损，病报部位还存在矿化不良。结论：釉质发育不全不仅有釉质量的减少，而且有质的改变，因而可能提高了发育不全釉质对龋齿的易感性。
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| 关 键 词： | 釉质发育不全／超微结构 牙.乳／超微结构 龋齿／病理学 |
SCANNING ELECTRON MICROSCOPIC STUDY ON HYPOPLASTIC PRIMARY TEETH |
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| ZHENG Shuguo, DENG Hui, GAO Xuejun, CAO Caifang.SCANNING ELECTRON MICROSCOPIC STUDY ON HYPOPLASTIC PRIMARY TEETH[J].Journal of Peking University:Health Sciences,1997(3). |
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| Authors: | ZHENG Shuguo DENG Hui GAO Xuejun CAO Caifang |
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| Abstract: | Objective: To observe the superficia1 ultrastructure of different types of hypoplastic primary teeth and to analyze its significance in enamel hypoplasia classification, pathogenesis and susceptibility to dental caries. Methods: Specimens were fixed, dehydrated f dried at critical point, coated with gold palladium by direct-current sputtering and examined with a HITACHI S-450 scanning electron microscope at 20kV. Results: There was a variety of irregular and hypomineralized enamel structures on defective enamel surfaces. Conclusion: There are both quantitative and qualitative changes in the enamel hypoplasia lesion, which may result in the increase of susceptibility of the defective teeth to caries. |
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| Keywords: | Dental enamel hypoplasia/ultrastruct Tooth deciduous/ultrastruct Dental caries/pathol |
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