The Types segment of Primary Hip Replacement System segmentation is organized by fixation strategy and bearing surface, each influencing clinical outcomes and cost structures. Fixation is divided into cemented, cementless, and hybrid systems; cemented implants hold a 30% share, favored for immediate stability in osteoporotic bone, while cementless designs capture 55% due to their bone‑ingrowth potential, especially in younger, active patients. Hybrid solutions, combining cemented stems with cementless cups, represent 15%, offering a compromise for mixed bone quality. Bearing surfaces further refine the taxonomy: metal‑on‑polyethylene (MoP) remains dominant at 50% because of cost‑effectiveness and long‑term data; ceramic‑on‑ceramic (CoC) holds 20%, prized for low wear rates in high‑activity cohorts; ceramic‑on‑polyethylene (CoP) accounts for 20%, balancing wear resistance with reduced fracture risk; and metal‑on‑metal (MoM), now limited to 10%, reflects declining use due to adverse event concerns. This dual‑layer classification clarifies how product attributes translate into market share, guiding manufacturers' portfolio decisions within the primary hip replacement system market.