Segmentation by types of scar fillers classifies products into five technical categories: Hyaluronic Acid Fillers, Collagen‑based Fillers, Calcium Hydroxylapatite Fillers, Poly‑L‑lactic Acid Fillers, and Autologous Fat Transfer. Hyaluronic Acid Fillers lead the segment, capturing the largest share due to their reversible nature, safety profile, and broad acceptance across all scar applications. Collagen‑based Fillers hold a modest portion of the market, primarily used for superficial scar remodeling where biocompatibility is paramount. Calcium Hydroxylapatite Fillers are favored for deeper, volumetric correction, especially in surgical and traumatic scar contexts, contributing a growing share as clinicians seek longer‑lasting outcomes. Poly‑L‑lactic Acid Fillers stimulate endogenous collagen production, making them attractive for progressive scar improvement, though adoption remains limited by higher cost and longer treatment timelines. Autologous Fat Transfer, while technically distinct, is classified within filler types for its natural tissue integration, serving niche cases where volume restoration and tissue regeneration are required. Each type’s market contribution reflects its clinical efficacy, safety, cost, and alignment with specific scar characteristics.