Sutures are used by your doctor to close wounds to your skin or other tissues. When your doctor sutures a wound, they’ll use a needle attached to a length of “thread” to stitch the wound shut.These sutures are made up of special silk, or synthetics like polyester, poly propylene or nylon. Non-absorbable sutures may or may not include coatings that enhance their performance characteristics and are typically used to close skin wounds. The suture is removed after a few weeks.Sutures, also known as stitches, are sterile surgical threads used to repair cuts. They are also commonly used to close incisions from surgery. Some wounds may require an alternative method like metal staples instead of sutures. It all depends on the wound.These sutures are made up of special silk, or synthetics like polyester, poly propylene or nylon. Non-absorbable sutures may or may not include coatings that enhance their performance characteristics and are typically used to close skin wounds. The suture is removed after a few weeks.