This is not a standard therapy but could provide improvement. Has your doctor shown you pictures of other scars he has treated with this technque?
There are some reports in the dermatologic literature that improvements were seen if a scar is dermabraded about 6- 8 weeks after injury. However, this is a different type of scar revision called a resurfacing technique that removes the top layer of skin. Fraxel is different in that it does not remove the top layer of skin. It creates laser holes in the skin similar to aerating your lawn.
I would advise avoidance of sun exposure with sunscreen and topical silicone preparations commonly available over the counter at the pharmacy.

