Does the laser procedure LANAP® really grow back the bone after periodontal disease or is it just a deep cleaning where you only clean out the bacteria?

Hopefully these xrays of one of my cases will be “worth a thousand words”.  If you look at the  bottom tooth (second from left to right)  you will noitice the notable difference in bone levels. This was achieved with the LANAP® laser without stitches or grafting.