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Permanent maxillary molars



The Permanent Maxillary First Molar

A Complete presentation explaining the complete morphology of Maxillary first molar, for the benefit of people like me who tried and failed to find everything in one package

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The Permanent Maxillary First Molar

  1. 1. The Permanent Maxillary First Molar - Aaron Sarwal (BDS 1st Prof.)
  2. 2. INTRODUCTIONThe Permanent Maxillary First Molar The maxillary first molar is the tooth located laterally (away from the midline of the face) from both the maxillary second premolars of the mouth but mesial (toward the midline of the face) from both maxillary second molars. The function of this molar is similar to that of all molars in regard to grinding being the principal action during mastication, commonly known as chewing.
  3. 3. CHRONOLOGYChronology:  CHRONOLOGY:
  4. 4. DESCRIPTION DetailedDescription
  5. 5. BUCCAL ASPECT The Buccal Aspect Trapezoidal shape Parts of all 4 cusps visible Portion of distal surface can be seen because of the obtuse distopalatal line angle Mesiobuccal cusp larger of the buccal cusps Has a prominent buccal groove that continues over from the occlusal surface Proximal contact areas in middle third All three roots are visible, palatal root centered between buccal roots
  6. 6. BUCCAL ASPECTBuccal Aspect
  7. 7. PALATAL ASPECT Palatal Aspect Outlines reversed from the buccal aspect, still trapezoidal. Mesiopalatal largest cusp Distopalatal smallest cusp, almost spheroidal Has a palatal pit at the end of the distopalatal groove There may be a cusp on the palatal surface of the mesiopalatal cusp. This is a fifth cusp called the cusp of Carabelli, which is visible in addition to the four cusps on the occlusal surface
  8. 8. PALATAL ASPECTPalatal Aspect Cusp of Carabelli
  9. 9. MESIAL ASPECT Mesial Aspect Mesiobuccal and mesiopalatal and fifth cusps visible. Mesial marginal ridge confluent with the mesiobuccal, mesiopalatal cusp ridges and curved cervically The contact area at the junction of the middle and occlusal third, closer to the buccal aspect Shallow concavity just below the contact area Cervical line irregular and curves occlusally
  10. 10. MESIAL ASPECTMesial Aspect
  11. 11. DISTAL ASPECT Distal Aspect Basic outlines reverse from mesial aspect Distobuccal and distopalatal cusps are seen Marginal ridge dips sharply cervically More of occlusal surface seen because of distal tilt of crown. Cervical line almost straight
  12. 12. DISTAL ASPECTDistal Aspect
  13. 13. OCCLUSAL ASPECT Occlusal Aspect Roughly rhomboidal shape Crown mesially and palatally wider than distally and buccally Intersection of mesial and buccal surfaces form acute angle Three largest cusps form a triangle Distopalatal least developed cusp Pronounced oblique ridge from the distobuccal to the mesiopalatal cusp Three occlusal fossae: mesial, central, and distal
  14. 14. OCCLUSAL ASPECT Occlusal Aspect Cusp size: - Mesiopalatal: largest - Mesiobuccal - Distobuccal - Distopalatal: smallest Oblique Ridge Ridges: - Mesial and distal marginal ridges and oblique ridge Fossae: - Major: Central and Distal fossa - Minor: Mesial and distal triangular Grooves: - Central, buccal and palatal developmental groove Transverse Ridge - Distal oblique groove - Transverse groove - Fifth cusp groove - Supplemental grooves Pit: - Central Pit Fossae and Pits Sulci and Depressions
  15. 15. OCCLUSAL ASPECTOcclusal Aspect
  16. 16. THE ROOT The Root Maxillary first molar has three roots; 2 buccal , 1 Palatal Palatal root is long and slender Mesiobuccal root broader, curves distally. Distobuccal root narrow at base and a lot straighter Buccal roots are of equal size, smaller than the palatal root Level of bifurcation closer to the cervical line mesially than distally
  17. 17. MAXILARY FIRST MOLARDifferentiation Between RightAnd Left Maxillary First Molars LEFT RIGHT
  18. 18. MAXILARY FIRST MOLARThank You!
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A Complete presentation explaining the complete morphology of Maxillary first molar, for the benefit of people like me who tried and failed to find everything in one package


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