Final answer:
The most likely suture type used for dural closure in an adult patient is 4-0 Neurolon because it's non-absorbable, providing necessary tensile strength and is appropriately sized for delicate dural tissue.
Step-by-step explanation:
The type of suture that would most likely be used to close the dura on an adult patient is 4-0 Neurolon. This choice is often preferred because Neurolon, which is a brand of nylon suture, is non-absorbable and provides the tensile strength required for dural closure. Additionally, the size 4-0 denotes a suture that is small enough to handle the delicate tissue of the dura without causing excessive trauma, yet strong enough to maintain dural closure during the healing process. Polyglactin 910 and chromic gut are absorbable sutures more commonly used for tissues where absorption is desirable, and polypropylene, while non-absorbable, is often used in cardiovascular and ophthalmic surgeries due to its characteristics.