How Long Do I Have to Keep Taping my Breast Reduction Scars to Reduce Scarring?

I recommend patients tape their scars with micropore for three months. My rationale for this is that a cell type responsible for excessive scar deposition - the myofibroblast - is stimulated to do so by being stretched. So by applying one inch of tape along the length of the scar, when you move and stretch and your skin is pulled, that one inch of skin moves as a single unit without stretch being exerted across the scar (I tell my patients its like a bit of road with a speed camera on it - whatever else is happening along the rest of the road, there is no speeding happening on that little bit of road!). Three months is a bit arbitrary, but by 3 months myofibroblasts have left the wound site under usual circumstances.
If patient's can't tolerate the tape (i.e. the skin is hypersensitive and becomes itchy or red) then I discontinue early. It is only in those cases that I ever need to do anything else for my scars (silicone, steroid or any other concoction) because with taping they are simply thin and flat straight away - prevention rather than cure. 

An older wise professor of mine liked to have patients use micropore or paper tape on incision for 6-8 weeks. I do not know of any scientific evidence to support this technique, but I admit to recommending it as well because I think jsut like silicone sheets I believe the contact and the tape itself may help with tension on the wounds.