How long on average does a wound like this take to heal? Breast Reduction. (Photo)

The "T" incision dehiscence can take 30 to 60 days to heal in most cases. Continue local wound care... 

Thank you for your question!  This is an unexpected, but not uncommon complication from breast reduction procedures.  The most likely location for wounds such as this is exactly where you have yours - the 'T' portion, as the three corners converge in this area and is at the most susceptible to breakdown as it is the most devascularized at this point.  Your wound appear clean with some healthy granulating tissue beneath.  It appears that your plastic surgeon has evaluated this and deemed it unnecessary for any further debridement or surgical intervention.  This will likely be treated well via local wound care, as you are doing.  Typically, if it continues to progress as expected, you should see results within 4-8 weeks.  Hope that this helps!  Best wishes for a greast result!

I'm sorry to hear about the complication you are experiencing. As you are aware however these wound healing problems can occur after breast reduction surgery;  with local wound care,  these wounds generally go on to heal over the course of the next 4-8 weeks. Best wishes; hopefully, you will be very pleased with the longer-term outcome of the procedure performed.