Study Of The Relationship Between Oral Actinomyces Spp. And Childhood Caries

Dental caries is considered to be one of the commonest chronic diseases of children. Studies about caries indicate that bacteria which form the dental plaque are the most important factors of caries. Up to now, the newest theory of dental caries is the plaque ecology theory. According to the theory, bacteria living in the plaque are the normal bacteria group in the oral cavity. Under normal situations, the ecology between bacteria and the host is in a balance, there is no chance of causing caries. The normal plaque changes its physiological structures into pathological ones when the circumstance change, the ecology of the plaque loses its balance. Some of the normal plaque bacteria become the chance pathogenic bacteria, producing much cariogenic subjects, and the dental caries begin. Lots of studies have shown that Actinomyces spp. is one kind of the earliest bacteria which colony in the oral cavity. Many attentions have been paid to the relationship between the Actinomyces spp. and root caries, while there is very limited data about the relationship between the Actinomyces spp.and...