A longitudinal sleeve has {HEAD ~ at least two radially spaced ligament contacting surfaces} located in {TAIL ~ lateral opposition} to a sleeve inner lumen 
located in
A longitudinal sleeve has { HEAD ~ at least two radially spaced ligament contacting surfaces } located in { TAIL ~ lateral opposition } to a sleeve inner lumen
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH