Recent research, conducted by Brewer et al. in 2023, using the latest genetic methods, showed that not only is periodontal disease more common in people diagnosed with RA, but also it is associated with the detection of antibodies against citrullinated proteins (ACPA), which indicates the involvement of oral mucositis in the pathogenesis of RA [115]. The gene discussed is PRTN3; the disease is rheumatoid arthritis.