{HEAD ~ The attachment member} helps to facilitate {TAIL ~ the engagement} and cooperation of the bone screw 340 and the bone plate 
{ HEAD ~ The attachment member } helps to facilitate { TAIL ~ the engagement } and cooperation of the bone screw 340 and the bone plate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH