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  1. 1. M.E. Mermigas, DDS 1Dental Anatomy
  2. 2. M.E. Mermigas, DDS 2Nomenclature• Maxilla• Mandible
  3. 3. M.E. Mermigas, DDS 3Deciduous Teeth• Primary Teeth• Post-natal development spans 2-1/2years• Usually 20 in number– 4 incisors– 2 canines– 4 molars per arch
  4. 4. M.E. Mermigas, DDS 4Deciduous Teeth• In clinical practice they are designatedby letters: A to T
  5. 5. M.E. Mermigas, DDS 5Permanent Teeth• Development begins with the eruptionof the first molars and exfoliation of thedeciduous incisors• Process requires 20 years to complete• Usually 32 in number• In clinical practice they are designatedby numbers: 1 to 32
  6. 6. M.E. Mermigas, DDS 6The Crown and Root• Crown- portion above thegingivae covered withenamel• Root- portion belowcovered with cementum• They are joined at thecemento-enamel junction(CEJ)
  7. 7. M.E. Mermigas, DDS 7Dentin• Comprises the main bulkof tooth structure• Histologically analagous tobone in composition
  8. 8. M.E. Mermigas, DDS 8Pulp Chamber and Canal• Contain the pulpaltissue– Nervous, arteriolarand venous tissue– fibrous tissue
  9. 9. M.E. Mermigas, DDS 9The Crown• Incisors have an incisal edge• Canines have a single cusp• Premolars and Molars have 2 or morecusps• These are the cutting surfaces of theteeth
  10. 10. M.E. Mermigas, DDS 10Incisor
  11. 11. M.E. Mermigas, DDS 11Canine
  12. 12. M.E. Mermigas, DDS 12Premolar
  13. 13. M.E. Mermigas, DDS 13Molar
  14. 14. M.E. Mermigas, DDS 14The Root• May be single or multiple• Firmly positioned in the boney processof the jaw called the alveolus• The alveolus together with the teethforms the dental arch• The cervical area of the teeth areusually covered with a soft tissue, thegingivae
  15. 15. M.E. Mermigas, DDS 15Surfaces and Ridges• Incisors and Canines- four surfaces anda ridge• Molars and Premolars- five surfaces
  16. 16. M.E. Mermigas, DDS 16Surfaces- named according topositions and uses• Facial- toward the lips or cheeks• Lingual- toward the tongue
  17. 17. M.E. Mermigas, DDS 17Surfaces• Occlusal- come in contact with those ofthe opposing jaw, molars and premolarsonly• Incisal- Those surfaces on the incisorsand canines coming into contact withthe opposing teeth
  18. 18. M.E. Mermigas, DDS 18Proximal Surfaces• Surfaces coming into contact with theadjacent teeth• Mesial- toward the midline• Distal- away from the midline• Which teeth have the mesial surfacestouching each other?
  19. 19. M.E. Mermigas, DDS 19Cusp• an elevation or mound on the crownportion of a tooth making up a divisionalpart of the occlusal surface
  20. 20. M.E. Mermigas, DDS 20
  21. 21. M.E. Mermigas, DDS 21Tubercle• A smaller elevation on the sameportion of the crown produced by anextra formation of enamel. Deviationfrom typical form.
  22. 22. M.E. Mermigas, DDS 22Cingulum• The lingual lobe of an anterior tooth
  23. 23. M.E. Mermigas, DDS 23
  24. 24. M.E. Mermigas, DDS 24Ridge• Any linear elevation on the surface of atooth and is named according to itslocation
  25. 25. M.E. Mermigas, DDS 25Marginal RidgeThose rounded borders ofenamel that form the mesial anddistal margins of the occlusalsurfaces of premolars or molars,and the lingual surfaces ofanterior teeth
  26. 26. M.E. Mermigas, DDS 26
  27. 27. M.E. Mermigas, DDS 27Triangular Ridges• descend from the cusp tips of molarsand premolars toward the central part ofthe occlusal surface
  28. 28. M.E. Mermigas, DDS 28
  29. 29. M.E. Mermigas, DDS 29Oblique Ridge• Crosses the occlusal surface ofmaxillary molars in an oblique fashion
  30. 30. M.E. Mermigas, DDS 30
  31. 31. M.E. Mermigas, DDS 31Fossa• An irregular depression or concavity
  32. 32. M.E. Mermigas, DDS 32
  33. 33. M.E. Mermigas, DDS 33Sulcus• A long depression or valley in thesurface of a tooth between ridges andcusps
  34. 34. M.E. Mermigas, DDS 34
  35. 35. M.E. Mermigas, DDS 35Developmental Groove• A shallow groove or line between theprimary parts of the crown or root
  36. 36. M.E. Mermigas, DDS 36
  37. 37. M.E. Mermigas, DDS 37Pits• Small pinpoint depressions located atthe junction of the developmentalgrooves
  38. 38. M.E. Mermigas, DDS 38
  39. 39. M.E. Mermigas, DDS 39
  40. 40. M.E. Mermigas, DDS 40