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Gate toward Operative Dentistry

Dr. Hicham Nuaimi
BDS, PG Dip in Operative and Esthetic Dentistry
PGDip in Implantology
MClin in Operative and Esthetic Dentistry

What are the objectives of Restorative Dentistry

is the mechanical procedure for eliminating decay lesion and establish proper design for retention and resistance of dental restoration withdraw its functional and esthetical approach.
What do We mean by Tooth Preparation?

Categories for tooth preparation

How can design our Preparation??

Classifications

Black’s Classification

Class III

Class IV

Charbeneu’s classification

Modification of Charbeneu’s classification
Class II: Cavities on single proximal surface of bicuspids and molars.

STURDEVANT ’S CLASSIFICATION

Finn’s Modification
For
deciduous teeth


BAUME’S CLASSIFICATION

Mount and Hume’s Classification

They tried in 1998 to find classification according to conservative approach in the extent and complexity, which encourage tooth structure for healing

INITIAL AND FINAL STAGES OF TOOTH PREPARATION

Initial tooth preparation stage:

Step 1: Outline form

Step 2 Resistance form
Step 3 Retention form
Step 4 Convenience form

Final tooth preparation stage:

Step 5 Eliminate any remaining infected dentin
Step 6: Pulp protection, if indicated
Step 7: Secondary resistance and retention forms
Step 8: Procedures for finishing external walls
Step 9: Final procedure--cleaning, inspecting sealing


Step 1

Step 2. Primary Resistance Form

Design walls to shape the final restoration and enable restoration withstand without fracture either tooth structure or restorative materials.

BY

Prepare round Internal Line angles

Step3: Primary Retention Form

Is the form to obtain resistance of dental restorative from displacement during mastication forces.

Step4: Convenience Form.

Is the step to provide a proper vision during decay removal.

Step 5:

Cases for removal old restoration

Step 7

Step 8: Procedure for Finishing the External Walls
Finishing the preparation wall is the further development, when indicated, of a specific Cavo surface design & degree of smoothness or roughness that produces the maximum effectiveness of the restorative material being used.

Objectives: -

1) create the best marginal seal possible between the restorative material and the tooth structure.
2)afford a smooth marginal junction.
3) provide maximal strength of the tooth & the restorative materials.

Step 9: Final Procedure: Cleaning, Inspecting. & Sealing

The usual procedure in cleaning is to decay free. Preparation of visible debris with warm water from the syringe & then to remove the visible moisture with a few light surges of air from the air syringe .


Thank You.