TT scar opening; advice on wound care? 4 weeks post-op (Photos)

Please insist on seeing your plastic surgeon. There may be a role for topical antibiotic cream. Your surgeon is best to evaluate and treat, with all due respect to his nurse.

I'm sorry to hear about the complication you have experienced. Yes, incision line separation and/or wound healing problems may occur after tummy tuck (or any other type of plastic surgical procedure). It may take several weeks to heal with dressing changes. Generally, patients do well but may require scar revision surgery down the line.

I would suggest that you continue to follow-up with your plastic surgeon and continue to be patient through the process. Sometimes, removal of an exposed suture and/or unhealthy tissue may help expedite the healing process. Emphasize good nutrition as well.
 I would expect that the wound will be completely closed in a matter of 1-2 weeks.
Best wishes. 

Suture reactions are common.  Keeping it moist with a dressing in place changed once or twice a day.  Medihoney is a great products as is Anasept gel.  Silvadene and some of the antibiotic ointments have been shown to retard healing.  It will all in from the inside out.  Periodic mechanical or sharp debridement by your PS will also facilitate healing.  The scar may be a hair wider but can always be revised.