3. Contents
• Introduction
• Objectives Access Cavity Preparation
• Principles of Endodontic Cavity Preparation
• Canal configurations
• Armamentarium
• Errors in cavity preparations
• Aids in locating canals
• Conclusion.
4. Introduction
“It is the efficient uncovering the roof of the pulp chamber &
providing the direct access to the apical foramina by the way of
the pulp canals”.
5. Objectives Access Cavity Preparation
• According to R.E. Walton, the 3
main objectives of Access Cavity
Preparation are :-
1. Straight line access.
2. Conservation of tooth structure.
3. Unroofing of chamber and exposure
of pulp horns.
6. Objectives Access Cavity Preparation
1. Straight line access:-
• Improved instrument control.
• Improved obturation.
• Decreased procedural errors.
2. Conservation of tooth structure:-
• Minimal weakening of tooth.
• Prevention of perforation
7. Objectives Access Cavity Preparation
3. Un roofing of chamber and exposure of pulp horns
• Maximum visibility
• Location of canals
8. Principles of Endodontic Cavity Preparation
• There are 4 Principles of Endodontic Cavity Preparation:-
I. Outline Form
II. Convenience Form
III. Removal of the remaining carious dentin and defective restorations.
IV. Toilet of the cavity
15. Aids in locating canals
• Presence of dark lines on the floor of the pulp chamber
(dentinal map).
• A drop of iodine on the floor of the pulp chamber.
• Use of fiber optic on buccal or lingual surface, either directly or
indirectly.
• Magnification and illumination.
