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