How Long Does It Take for Stitches to Dissolve After Tummy Tuck?

Average time is 6 weeks to 3 months. But you can always have them removed by the surgeon if superficial. If you are asking about the deep sutures than time will allow the body to resorb them or phagocytize them.

From MIAMI Dr. B

There are many of different types of sutures used with some lastng 4-6 weeks, others 3-6 months while others are permanent

There really is no correct answer for this since there are tons of different kinds of stitches used by different surgeons during tummy tuck.  Some surgeons even use permanent stitches for the deeper areas.  If you have a more specific question or have a concern, please post that so we can give you a more complete answer.  Good luck.