Preferably, the invention relates to a device wherein the brackets do not have 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 {HEAD ~ the site} of {TAIL ~ osteogenesis} 
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Preferably , the invention relates to a device wherein the brackets do not have 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 { HEAD ~ the site } of { TAIL ~ osteogenesis }
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