Regarding the phases of wound healing, all of the following statements are correct EXCEPT:

## Phases of Wound Healing: Timeline and Characteristics ### Inflammatory Phase (0–5 days) **Key Point:** Begins immediately after injury with hemostasis and inflammatory cell infiltration. Neutrophils appear within hours; macrophages peak by day 3–5. ### Proliferative Phase (5–21 days) **Key Point:** Characterized by fibroblast proliferation, collagen deposition, angiogenesis, and epithelialization. **High-Yield:** Epithelialization typically begins within 24 hours and is NOT complete by the end of the inflammatory phase. In primary intention wounds, epithelialization is complete by 7–10 days (well into the proliferative phase). ### Remodeling Phase (21 days–2 years) **Key Point:** Collagen remodeling and cross-linking continue; tensile strength increases gradually. ### Why Option 2 is Wrong Epithelialization is an active process that spans from day 1 through the proliferative phase. Epithelial cells begin migration and proliferation within 24 hours and complete coverage typically by 7–10 days. Stating it is complete by the end of the inflammatory phase (day 5) is **factually incorrect** — this is the trap in this question. ### Verification of Other Options | Phase | Timeline | Key Events | |-------|----------|------------| | Inflammatory | 0–5 days | Hemostasis, neutrophil infiltration, macrophage activation | | Proliferative | 5–21 days | Fibroblast proliferation, collagen deposition, angiogenesis, epithelialization | | Remodeling | 21 days–2 years | Collagen cross-linking, tensile strength maturation | **Clinical Pearl:** In surgical practice, primary intention wounds (clean, well-approximated) achieve epithelialization by 7–10 days, allowing suture removal. Secondary intention wounds take weeks to months due to the need for granulation tissue formation and epithelialization from wound margins. **Mnemonic: FERN** — Fibroblasts, Epithelialization, Remodeling, Neovascularization (the hallmarks of proliferation and remodeling phases).