Final answer:
Alginate dressings are used for deep granulation of pressure ulcers as they are highly absorbent and promote wound healing by creating a moist environment for granulation tissue formation.
Step-by-step explanation:
The material used for deep granulation of a pressure ulcer is called alginate dressings
These dressings are made from seaweed and come in the form of a gel or a powder. They are highly absorbent and can help remove excess fluid and promote healing of the wound.
Alginate dressings are often used for wounds with moderate to heavy drainage and help create a moist environment to support granulation tissue formation and wound healing.