Braided suture is usually made of natural products (silk,
linen or cotton). It is acceptable in many situations, but is
contraindicated in a wound that is, or may be, contaminated.
Synthetic monofilament suture, such as nylon polypropamide, may
be left in the deeper layers, and is not contraindicated in situations
of contamination. It is often used as continuous suture. The
knots are less secure than those in braided suture or in polyglycolic
acid suture and more throws are used for a secure knot.
Use non-absorbable suture material when possible. Sterilized
polyester thread and nylon line produced for non-surgical purposes
are acceptable compromises when commercial suture is unavailable.