Zenodo: Patient raw data for paper (Evaluation of Salivary HLA-DR4 and MMP-8 Levels Along with Porphyromonas gingivalis in Periodontitis Patients with Rheumatoid Arthritis),https://doi.org/10.5281/zenodo.15376986 (Nori et al., 2025a). This evidence concerns the gene MMP8 and periodontitis.