An umbrella review of the evidence linking oral health and systemic noncommunicable diseases

Previous studies have supported a potential bidirectional association between oral diseases and systemic noncommunicable diseases (NCDs) Here the authors perform an umbrella review of meta-analyses for the association between oral health and NCDs, and report that 27 NCDs were associated with oral disease, however, the overall strength of evidence was found to be unfavorable and with methodological inconsistencies.