Diabetes mellitus is a well documented disease that is present worldwide. This paper aims to explore the connection between DM and the oral cavity. Conditions or diseases which manifest themselves within the oral cavity as direct or indirect results of diabetes mellitus have been highlighted. Moreover, emphasis is made on the contol, management, treatment of DM. The conclusion to these findings show that there is positive correlation between the oral diseases mentioned and DM but statistically significant results are only found with regards to uncontrolled DM patients.