^^Cali said^^
However, They may partially grow in a bit depending on how far you're in bud. And where on the bud the burn occurred, assuming it was the tip, all you can hope for is the bottom to grow in. If it was the side you can hope 4 a little bit a growth round edges. If they do begin to grow back, trim away the dead parts, they can lead down the road to budrot.
Good luck;)