The Types axis of Interbody Cage segmentation classifies products by material and design architecture, including PEEK, titanium, 3‑D‑printed, and expandable cages. PEEK cages, comprising roughly 40 % of sales, are valued for radiolucency and elastic modulus matching that of bone, facilitating postoperative imaging and reducing stress shielding. Titanium cages hold about 35 % of the market; their high strength‑to‑weight ratio and osseointegration potential make them preferred for load‑bearing applications and revision surgeries. 3‑D‑printed cages, an emerging sub‑segment at ~15 %, leverage patient‑specific geometry and porous lattice structures to enhance fusion rates, attracting premium‑price positioning. Expandable cages, representing the remaining 10 %, address the need for intra‑operative height adjustment and minimally invasive insertion, thereby expanding the addressable patient pool. Together, these type categories delineate the market taxonomy, with each contributing a distinct share to the overall Interbody Cage market based on clinical performance, cost considerations, and adoption velocity.