Mesio-distal direction of the tooth to be reconstructed will be controlled and corrected. I allows you to control the extrapolated crown in the cross section. The extrapolated crown is corrected by moving the cusp marks into the center of these clouds . Cross section shows the situation after the first correction. Equator and fissure are not yet in perfect position.
Fissure is corrected.
Check fissure in the cross section. Equator is corrected. Corrections are done, contour lines are congruent. Following this construction the crown becomes milled. The margins are supragingival.