建立口内菌斑模型研究菌斑超微结构

目的:系统了解菌斑形成的超微结构。方法:建立一种口内的菌斑模型,并将1、5、9d形成的菌斑标本制成电镜切片后用透射电镜观察。结果:显示初期菌斑的细菌较少,主要为球状菌。随着时间的延长,细菌的数量和种类开始增加,出现丝状菌和杆状菌。成熟菌斑结构是两侧为丝状菌中间为球状菌的栅栏状结构,其中部分细菌会出现坏死的现象。结论:所建立的菌斑模型较接近天然菌斑结构,具有一定的参考价值。

A study of the plaque ultrastructure by a dental plaque model in vivo

Objective:To observe the structure and formation of plaque.Methods: A 1 mm in heigth and 3 mm in diameter plastic ring was adhered to enamel slice, then the enamel slices with plastic rings were adhered to right maxillary first molars in order to establish the model of dental plaque.The specimens of dental plaque for 1 day, 5 days and 9 days were serially sectioned and were imaged by TEM. Results:The TEM results showed that there were few microorganisms in early plaques, mainly of which were coccus. With the time went on, the kind and quantity of the microorganisms became more, and bacilli and hyphomycetes also appeared. In mature plaques, there were fence-like structure with coccus in center and bacilli and hyphomyceters at both sides, in which some bacteria went to necrosis. Conclusion:The ultrasrtucture of this dental plaque model was similar to nature's with a certain extent values.