Which sequence best describes the order of the healing stages?

• A. Acute stage involves signs of inflammation; Subacute stage involves proliferation and repair; Chronic stage involves maturation and remodeling
• B. Acute stage involves maturation and remodeling; Subacute stage involves chronic inflammation; Chronic stage involves proliferation
• C. Acute stage involves inflammation fully resolved; Subacute stage involves nothing; Chronic stage involves no remodeling
• D. Acute stage involves pain without inflammation; Subacute stage involves swelling; Chronic stage involves complete rest

Answer: (A)

Healing progresses through three overlapping but distinct phases: acute with inflammation, subacute with proliferation and repair, and chronic with maturation and remodeling. In the acute phase, the body's primary response is inflammation—vascular changes and immune cell activity bring in cells to clean up debris and control the injury, which is why signs like redness, swelling, heat, and pain are common. As healing moves into the subacute phase, proliferation and repair take the lead: fibroblasts synthesize collagen, new blood vessels form, granulation tissue fills the wound, and epithelial cells migrate to cover the surface. In the chronic phase, maturation and remodeling occur, with collagen fibers reorganizing along lines of stress, increasing tensile strength, and scar tissue gradually remodeling over time. This sequence aligns with the option that correctly assigns inflammation to the acute stage, proliferation and repair to the subacute stage, and maturation and remodeling to the chronic stage. Other descriptions misplace these processes—such as suggesting inflammation is fully resolved in the acute phase, or insisting proliferation occurs in the chronic phase—so they don’t fit the typical healing timeline.