The market taxonomy under Types segments supply into in-vivo, in-vitro and ex-vivo classes, each shaping cost structure and endpoint granularity. In-vivo (≈74 % market value) encompasses ligature, endotoxin and diabetes-associated rodent or canine platforms that recreate complex inflammatory crosstalk; high ethical compliance and husbandry costs keep average selling prices above USD 1,300, but translational read-outs (alveolar bone loss, CEJ-AC distance) justify spend, especially for multinational pharma. In-vitro (≈19 %)—3-D gingival organoids, oral mucosa equivalents and microfluidic “gum-on-chip”—offers medium-throughput screening at USD 200-500 per replicate; scalability and 3Rs alignment accelerate adoption among CROs, pushing segment CAGR above 11 %. Ex-vivo (≈7 %) utilizes freshly harvested rodent mandibles or precision-cut tissue slices maintained in bioreactors for up to 72 h; lower labour intensity and quicker turnaround appeal to academia, yet limited shelf-life restrains share, completing the Periodontal Disease Model segmentation matrix.