The incisal edges and the incisal thirds of facial surfaces of mandibular incisors and canines generally oppose lingual surfaces of maxillary incisor and canines _____________? A. Within the incisor thirds B. At the junction of middle and cervical thirds C.…

The key to occlusion is_______________? A. Maxillary permanent first molar B. Maxillary permanent second molar C. Maxillary primary first molar D. Maxillary primary second molar

In normal occlusion , with which grooves / surface of the permanent mandibular first molar does the mesiobuccal cusp of the permanent maxillary first molar occlude______________? A. Distobuccal groove B. Mesial surfaceC. Mesiobuccal surface D. Transverse groove