1、Molars,Have large crowns with 4-5 well-formed cusps.Mult-roots,First molar：erupt at 6 years old Second molar：erupt at 12 years old Third molar：wisdom teeth,Maxillary First Molar,1 The largest tooth in the maxillary arch. 2 The crown is wider buccolingually than mesiodistally. 3 four well-development
2、al cusps, one supplemental cusp called cusp of Carabelli. 4 three roots.,Buccal Aspect,LingualAspect,MesialAspect,Distal Aspest,Occlusal Aspect:,Maxillary Second Molar,Smaller than the first molar 1）buccal surface:distal buccal cusp more smaller than mesial buccal cusp. 2）lingual surface:mesial ling
3、ual cusp is very large. Lack of Carabelle cusp. 3）proximal surface:mesial surface is larger than distal surface. 4）occlusal surface:more oblique than the first molar.No clear oblique rigde.5）root: less bifurcation.,Buccal surface,Lingual surface,Mesial surface,Diatal surface,Occlusal surface,Root,Mandibular First Molar,The largest of the madibular teeth.,Buccal surface,Lingual surface,Mesial surface,Distal surface,Occlusal surface,root,Mandibular Second Molar,Buccal surface,Lingual surface,Mesial surface,Distal surface,Occlusal surface,root,Thank you,good bye!,
