Department : Prostho
The upper central incisors are placed along a teeth arrangement line that runs perpendicular to the frontal plane and touches the front margin of the incisive papilla. The mandibular central incisors' located by a line drawn perpendicular to the frontal plane and slicing through the remaining ridge. The mandibular posterior teeth's bucco-lingual location is helped by a line that follows the crest of the residual ridge and extends from the canine tip to the middle of the retro molar pad.
Molar key of occlusion -the distal surface of the distobuccal cusp of the upper first permanent molar occluded with the mesial surface of the mesiobuccal cusp of the lower second molar.
