منابع مشابه
Bacterial sex in dental plaque
Genes are transferred between bacteria in dental plaque by transduction, conjugation, and transformation. Membrane vesicles can also provide a mechanism for horizontal gene transfer. DNA transfer is considered bacterial sex, but the transfer is not parallel to processes that we associate with sex in higher organisms. Several examples of bacterial gene transfer in the oral cavity are given in th...
متن کاملCurrent status of dental plaque
The review deals with global position of the dental plaque, development of dental plaque and species involved and their pathogenicity. Streptococci are the initial colonizers in development of the dental plaque. They attach to the acquired pellicle on tooth surface and later on they show receptors for bonding with the secondary colonizers and late colonizers The conditions leading to the develo...
متن کاملThe structure of dental plaque
Dental plaque has been defined as “the nonmineralized microbial accumulation that adheres tenaciously to tooth surface, restorations, and prosthetic appliances, shows structural organization with predominance of filamentous forms, is composed of an organic matrix derived from salivary glycoproteins and extracellular microbial products, and cannot be removed by rinsing or water spray” (102). The...
متن کاملIntergeneric communication in dental plaque biofilms.
Dental plaque is a complex biofilm that accretes in a series of discrete steps proceeding from a gram-positive streptococcus-rich biofilm to a structure rich in gram-negative anaerobes. This study investigated information flow between two unrelated plaque bacteria, Streptococcus cristatus and Porphyromonas gingivalis. A surface protein of S. cristatus caused repression of the P. gingivalis fimb...
متن کامل[Helicobacter pylori in the dental plaque].
Helicobacter pylori (Hp) were detected in the dental plaque in 40 patients with peptic ulcer, chronic gastritis or gastric cancer with rapid urease test, anti-Hp fluorescein-labelled antibody staining, bacterial culture and electronic microscopy. At the same time, biopsy specimens from the gastric antrum of these patients were studied with WS staining and rapid urease test to detect Hp. The res...
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ژورنال
عنوان ژورنال: Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)
سال: 1977
ISSN: 0385-0110,1880-408X
DOI: 10.2329/perio.19.369