Final answer:
Wounds that heal by tertiary intention are those that are initially left open due to factors like infection or edema and are later closed manually, combining aspects of primary and secondary intention healing methods.
Step-by-step explanation:
The type of wounds that heal by what is known as tertiary intention are those that require a delay before closing the wound, for reasons such as the need for edema or infection to resolve or because there is a loss of tissue that requires a graft. Tertiary intention, sometimes referred to as delayed primary closure, involves leaving the wound open for a period of time to allow better resolution of swelling or infection, followed by the eventual closure of the wound, typically using sutures or other methods.
This method combines aspects of both primary and secondary intention healing. In primary intention, the edges of a clean and uninfected wound are aligned and held together to heal, commonly associated with surgical wounds. Secondary intention is where the wound heals by granulation, contraction, and epithelialization, typically done when the wound edges cannot be easily brought together.