Dental biofilms are complex and highly organized microbial communities that are essential in the pathogenesis of many oral diseases, including dental caries, periodontal diseases, and endodontic infections. The ability of bacteria to form biofilms on tooth surfaces or in the root canal system is a key factor in their survival and resistance to treatment. The unique properties of biofilms, including their ability to protect bacteria from antimicrobial agents and host immune defenses, make infections more persistent and challenging to treat. By understanding the ecological processes that govern biofilm formation and persistence, as well as the strategies bacteria use to adapt to their environment, we can develop more effective treatments and preventive measures for biofilm-related oral diseases. As science and technology continue to advance, new approaches to biofilm control and management will likely lead to better outcomes in the treatment of oral infections.