The relationship between ABO blood groups and oral diseases: a narrative review

Human beings share identical blood systems, even though they differ in several particular types. The distribution sequence of RH and ABO systems is complicated around the world. Various research in recent years has demonstrated that non-O blood groups, also known as ABO blood groups, are associated with an increased risk of developing oral diseases such as Candida infection, periodontal diseases, and oral cancer. The major aim of this extensive literature review was to determine the relationship between oral diseases and ABO blood grouping. We searched PubMed and google scholar using different terms and combinations to find papers related to oral diseases and ABO blood types. There was no language restriction, and all studies that investigated the relationship between ABO blood types and any oral diseases were included. The findings of this study suggested that ABO blood subtypes could be considered risk factors in the evolution of several diseases in the oral cavity that affect teeth, periodontium, and oral mucosa.