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Internal Anatomy of Teeth

Internal Anatomy of Teeth. Dr. Mohammad Hammad. Endodontics is a specialty of dentistry , that deals with the tooth pulp and tissues surrounding the root of a tooth. Why do we need to perform root canal treatment? Irreversibly inflamed pulp (pulpitis). Pulp Necrosis.

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Internal Anatomy of Teeth

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  1. Internal Anatomy ofTeeth Dr. Mohammad Hammad

  2. Endodontics is a specialty of dentistry, that deals with the tooth pulp and tissues surrounding the root of a tooth.

  3. Why do we need to perform root canal treatment? • Irreversibly inflamed pulp (pulpitis). • Pulp Necrosis.

  4. What are the general steps of root canal treatment? • Access cavity. • Cleaning and shaping of the canals. • Obturation (filling) of the canals.

  5. Root canal system: chamber and canals. • Root canals begins at the orifice and ends at the apical foramen. • Most root canals are curved. • Accessory canals: small canals extending from pulp to peridontium (horizontal, vertical, lateral or furcational).

  6. Basic anatomy of a molar tooth

  7. Vertucci’s canal configuration • A root with a tapering canal and a single foramen is the exception rather than the rule. • Type I: single canal extending from pulp chamber to the apex (1).

  8. Type II: Two separate canals leaving the pulp chamber but join short from the apex (2-1).

  9. Type III: one canal leaving the pulp chamber that divides into 2 canals then merges again to exit as one canal (1-2-1).

  10. Type IV: two separate canals extending from pulp chamber to apex (2).

  11. Type V: One canal leaving the pulp chamber and divides and exits the apex as two separate canals (1-2).

  12. Type VI: two separate canals leaving the pulp chamber then unite to form one canal then divides and exit as two canals (2-1-2).

  13. Type VII: One canal leaving the pulp chamber then divides into two canals then unite to form one canal then re-divides and exit as two canals (1-2-1-2).

  14. Type VIII: three separate canals leaving the pulp chamber and exit the apex (3).

  15. Wein’s four possible canal configurations

  16. Apical root anatomy

  17. Apical constriction=minor apical diameter: the narrowest part of the canal. • Apical foramen= major apical diameter. • Cementodentinal junction. • AF not usually coincident with anatomical apex.

  18. Apical constriction 1mm Apical foramen 2mm Anatomical apex

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