Hypertrophic scarring most commonly develops after deep second-degree burns because these burns damage the dermis extensively while preserving some dermal elements, leading to an aberrant wound healing response with excessive collagen deposition. In contrast, superficial and first-degree burns primarily involve the epidermis and heal without significant scarring. Deep second-degree burns risk prolonged inflammation and abnormal fibroblast activity, which are key factors driving hypertrophic scar formation. Proper management requires surgical intervention to optimize healing and minimize scarring.

Reference: Plastic Surgery, 4th Edition.