Suture: Synthetic absorbable suture Component part: Ethanoic acid, lactic acid Structure: Stranded tight braided Absorbtion: By hydroliysis. Complete between 60& 90 days Colour: Violet or undyed Specification: Usp8/0-2 Sterilization: By ethylene oxide Chromic catgut(absorbable) suture Component parts: Produced from purified animal intestines(beef of sheep) Structure: Monofilament, smooth surface Absorbtion: By enzymatic digestion. Complete from 90 days. Colour: Green or tan Diameters of sutures: Usp6/0-4 Packaging: In a conditioning fluid containing isopropanol water. Sterilization: By gamma radiation Plain catgut(absorbable) suture Component parts: Produced from purified animal intestines(beef of sheep) Structure: Monofilament, smooth surface Absorbtion: By enzymatic digestion. Complete from 90 days. Colour: Straw Diameters of sutures: Usp6/0-4 Packaging: In a conditioning fluid containing isopropanol water. Sterilization: By gamma radiation Silk(braided) suture Component part: Natural silk Structure: Braided Absorbtion: Non-absorbable Colour: Black or ivory Diameters of sutures: Usp6/0-4 Sterilization: By gamma radiation. The choice of needle shape is frequently governed by the accessibility of the tissue to be sutured, and normally the more confined the operative site the greater the curvature required. The basic shapes involved are: Straight,1/4 circle,3/8 circle or curved,1/2 circle,5/8 circle, half curved, j needle and compound curve.