Tummy Tuck/scar: how long does it take for the stitches to dissolve?

Hello and thank you for your
question.  I placed all the stitches under the skin and they are dissolving sutures.  The scar tends to improve over the course of six months.  If you are an appropriate candidate for a tummy tuck, this can be done
through a low and short incision, all completely below the bikini line.  The belly button can be designed to look
natural and have no scars on the exterior.  
Your muscles can also be plicated resulting in a flat abdomen.  Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.  The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D. FACS
Harvard-trained plastic surgeon

It depends on the sutures used, but most of the time the sutures used to tighten the muscles are permanent and don't dissolve while the other sutures will dissolve over 3 months maybe 6 months for the deepest ones. The scar should start to look better after about 6 months. The scar continues to change for up to a year, but the strength of the scar is as good as it can be after about 6 to 12 weeks.  

Recovery after tummy tuck is typically based not on the speed of the incision healing but by the speed of the muscle repair healing. The skin incision typically heals quickly and is usually well healed within 2 to 3 weeks. If dissolvable stitches are used some may take up to 6 weeks or longer to dissolve. The muscle repair takes 6 weeks to heal for allowing patients to resume  unrestricted activities. Hope this helps. Good luck.