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Internal Anatomy of Teeth Dr. Mohammad Hammad. Endodontics is a specialty of dentistry, that deals with the tooth pulp and tissues surrounding the root.

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Presentation on theme: "Internal Anatomy of Teeth Dr. Mohammad Hammad. Endodontics is a specialty of dentistry, that deals with the tooth pulp and tissues surrounding the root."— Presentation transcript:

1 Internal Anatomy of Teeth Dr. Mohammad Hammad

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

3 Why do we need to perform root canal treatment? (1)Irreversibly inflamed pulp (pulpitis). (2)Pulp Necrosis.

4

5 What are the general steps of root canal treatment? (1)Access cavity. (2)Cleaning and shaping of the canals. (3)Obturation (filling) of the canals.

6 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).

7 Basic anatomy of a molar tooth

8 Vertuccis 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).

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

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

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

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

13 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).

14 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 ( ).

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

16 Weins four possible canal configurations

17 Apical root anatomy

18 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.

19 Apical constriction Apical foramen 1mm Anatomical apex 2mm


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