where, Y: crowning curve having {HEAD ~ an origin} at {TAIL ~ the tooth surface} at the center of the tooth thickness, 
where , Y : crowning curve having { HEAD ~ an origin } at { TAIL ~ the tooth surface } at the center of the tooth thickness ,
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH