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Un-coated braided sutures may provide increased resistance to passage through the tissues and may harbour bacteria within the braid.
Braided sutures are however easier to use and knots tend to be more secure
Coating a braided suture gives the suture qualities more like a mono-filament suture
Mono-filament sutures are generally easy to use with easy passage through tissue but may not hold a knot well. They also usually result in low tissue reactivity and the smooth surface does not harbour bacteria.
Natural materials generally result in greater tissue reactivity


Braided synthetic absorbable suture
Polyglactin 910
Retains 70% of initial strength at 10 days and 30% at 20 days
Complete absorption in 60 - 90 days

Coated Vicryl

As Above
Coated with a mixture of calcium stearate and polyglactin 370
Maintains 100% strength for ~ 45 days and then decreases to 70% by ~ 50 days
Needle sizes commonly used;
1       36mm taper
2/0     26mm cutting edge
3/0     22mm cutting edge

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