The repair/regeneration phase of tissue healing lasts typically how long?

• A. 4-21 days
• B. 1-2 days
• C. 6 weeks
• D. 6 months

Answer: (A)

The repair phase is when the body rebuilds the damaged tissue after the initial inflammatory response. During this time, fibroblasts lay down collagen, granulation tissue forms, new blood vessels grow, and any surface epithelium begins to re-cover the wound where possible. This rebuilding typically lasts from a few days up to a few weeks, commonly about four to twenty-one days, depending on the tissue and the injury. Beyond this window, remodeling continues for weeks to months as the scar matures. The other timeframes don’t fit because 1–2 days is still mainly inflammatory, six weeks points to remodeling rather than the repair window, and six months is well into remodeling of the scar.