Please answer the following: Describe the overall anatomy of the crown and root
ID: 3513897 • Letter: P
Question
Please answer the following: Describe the overall anatomy of the crown and root of the maxillary molars. Describe the overall anatomy of the crown and root of the mandibular molars. What are the differences between the upper and lower 1st molars? What are the differences between the upper and lower 2nd molars? Explain grooves and pits of the maxillary and mandibular molars. What are the developmental disturbances that can affect 3rd molars? How can you distinguish the right maxillary 1st molar from the left? At what ages do the molars erupt? How could you tell the difference between a maxillary 1st and maxillary 2nd molar? Where are the furcations on mandibular molars and maxillary molars? What is the order of cusps from largest to smallest on # 19 and #30? What is the order of cusps from largest to smallest on #3 and #14? What is an oblique ridge and where would you find it? What tooth numbers are associated with 3rd molars? What tooth numbers are associated with 2nd molars?
Explanation / Answer
Maxillary molars:
Maxillary first molar:
It is the largest tooth. Four cusps present; mesiobuccal cusp, distobuccal cusp, mesiolingual cusp, distolingual cusp. A fifth cusp called cusp of carabelli present on mesial half of mesiolingual cusp. The mesiolingual cusp is largest cusp. 3 roots are present; mesiobuccal root, distobuccal root and palatal root. Palatal root is largest root. Distobuccal root is smallest. The occlusal outline is rhomboidal. The mesiobuccal and distolingual angle of occlusal aspect is acute, whereas mesiolingual and distobuccal angle is obtuse. An oblique ridge runs between mesiolingual cusp and disto buccal cusp. The four major cusps are seperated by H shaped occlusal groove.
Maxillary second molar:
It is smaller than first molar. Cusp of carabelli absent. Rhomboidal outline is more pronounced.
Maxillary third molar:
It shows heart shaped occlusal form. It is the tooth that form greatest variation in occlusal form. The roots are shorter and commonly fused and shows greatest variation in morphology