Suture material is either absorbable or nonabsorbable. Absorbable remains in place until it is absorbed or degraded by the body. It is either catgut, which is made from the intestine of sheep, or a synthetic material such as Vicryl. Nonabsorbable suture is made from silk, nylon, or cotton. The suture material will vary in strength and size dependent on the purpose and place that is sutured. Fine suture is used in areas such as the face or eye surgery. Medium and coarse suture is used for areas that need more support such as arms, legs, and abdomen.
Needles for suture are generally disposable and come with suture material attached. These needles are called atraumatic needles. There is no eye in the needle and the thread is attached. Needles come in different sizes and lengths for use in different areas and for different purposes. The needles may be curved or straight, dependant on the purpose. An instrument called a needleholder may be used for control of curved needles.
Alternatives to sutures include staples, surgical adhesive, and Steri-Strips to hold skin together.