Preferably, the invention relates to a device wherein the brackets do not have {HEAD ~ extensions} that are directed perpendicularly to the distraction screw and perpendicularly to the brackets, at a level between the brackets and directed away from the distraction screw into {TAIL ~ the site} of osteogenesis 
are directed into
Preferably , the invention relates to a device wherein the brackets do not have { HEAD ~ extensions } that are directed perpendicularly to the distraction screw and perpendicularly to the brackets , at a level between the brackets and directed away from the distraction screw into { TAIL ~ the site } of osteogenesis
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH