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