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Wounds contract over time. (A) Contraction of porcine wounds left to heal by secondary intention for 20 days. (B) Human contact burn to the leg, at admission and at days 8, 12, 15, 20, and 32 after injury (i–vi, respectively). A skin graft was applied at day 8. Black arrow indicates the tension on the surrounding tissue caused by the contracting scar. White arrow indicates hypertrophic scar, possibly developing into contracture.
