Final answer:
Nonabsorbable suture material is used for suturing dense connective tissue that requires long-term support during healing, such as fascia, ligaments, and tendons.
Step-by-step explanation:
Nonabsorbable suture material is typically used for suturing tissues that require long-term support, like connective tissue that has a high tensile strength, provided by collagen fiber. These materials are chosen for their durability and their ability to maintain wound closure over an extended period. Nonabsorbable sutures are particularly used in suturing dense connective tissue such as fascia, ligaments, tendons, and fibrous capsules of organs since these structures benefit from prolonged support during the healing process and often bear significant mechanical loads. In contrast, tissues with a fast healing rate might not require nonabsorbable sutures, as they can cause more irritation or infection risk over time.