amhsr-open access medicla research journals
Mohammed Awadh Al-Shahrani*
Department of Dental Education, College of Dentistry, Abha, Saudi Arabia, Email:
*Correspondence: Mohammed Awadh Al-Shahrani, Department of Dental Education, College of Dentistry, Abha, Saudi Arabia, Tel: 00966561343636, Email:,

Citation: Al-Shahrani MA. Microbiology of Dental Caries: A Literature Review. Ann Med Health Sci Res. 2019;9: 655-659

This open-access article is distributed under the terms of the Creative Commons Attribution Non-Commercial License (CC BY-NC) (, which permits reuse, distribution and reproduction of the article, provided that the original work is properly cited and the reuse is restricted to noncommercial purposes. For commercial reuse, contact


Aim: to review the current knowledge on dental caries microbiology and critically appraise the literature.

Methodology: An electronic search of the available dental literature was done using different databases (PubMed, Google Scholar, Scopus). The following keywords were used: dental caries, carcinogenic bacteria and oral biofilm. In addition, classic textbooks that related to dental caries and oral microbiology were searched.

Findings: Oral bacteria can grow in two ways: in planktonic or biofilm forms. In the past, most microbial studies were studies of the planktonic form. Only around 0.1% of oral bacteria grow in the planktonic state. Bacterial cells usually aggregate and attach to the tooth surface to form an oral biofilm. The polysaccharides in the biofilm matrix are a resource that acidogenic bacteria metabolise and produce acids to initiate or progress the dental caries lesion. Different types of acids are created as a result of biofilm metabolism, which cause a shift in oral pH under the critical level. This reduction in the pH level will influence the chemical composition of the tooth surface. The bacterial cells start to multiply to form a microcolony within 24 hours. If left undisturbed the growth is continued, resulting in a mature type of biofilm within a week.

Summary of findings: The most frequent species found associated with dental caries were mutans streptococci and lactobacilli, which shift the balance towards tooth tissue demineralisation.

Select your language of interest to view the total content in your interested language

Awards Nomination
20+ Million Readerbase
Abstracted/Indexed in

  • Include Baidu Scholar
  • CNKI (China National Knowledge Infrastructure)
  • EBSCO Publishing's Electronic Databases
  • Exlibris – Primo Central
  • Google Scholar
  • Hinari
  • Infotrieve
  • National Science Library
  • ProQuest
  • TdNet
  • African Index Medicus
Annals of Medical and Health Sciences Research The Annals of Medical and Health Sciences Research is a bi-monthly multidisciplinary medical journal.
Submit your Manuscript