Class-I cavity preparations are those done on the occlusal surfaces of premolars and molars, as well as the occlusal two-thirds of the facial and lingual surfaces of molars and the lingual surfaces of maxillary incisors. The steps for cavity preparation include outlining the cavity, creating an initial depth cut, forming the primary resistance and retention shapes, adding a convenience form, removing any infected dentin or old restorative material, providing pulp protection if needed, finishing the secondary resistance and retention forms, smoothing the external walls, and doing final cleaning, inspection, and desensitization procedures.
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Class 1 cavity preparation
1. CLASS-I CAVITY PREPARATION
CLASS-I CAVITY PREPARATION: - ALL PIT-AND-FISSURE
PREPARATIONS ARE TERMED AS CLASS-I PREPARATION.THESE INCLUDE
PREPARATION ON: -
OCCLUSAL SURAFCEOF PREMOLARS AND MOLARS
OCCLUSAL TWO-THIRD OF THE FACIAL AND LINGUALSURFACESOF MOLARS
LINGUALSURFACES OF MAXILLARY INCISORS.
STEPS OF CAVITY PREPARATION: -
SS
INITIAL TOOTH PREPARATION STAGES FINAL TOOTH PREPARATION STAGES
OUTLINE FORMAND INITIAL DEPTH
PRIMARY RESISTANCE FORM
PRIMARY RETENTION FORM
CONVENIENCE FORM
REMOVAL OFANY REMAININGINFECTED DENTIN OR OLD
RESTORATIVE MATERIAL
PULP PROTECTION, IF INDICATED
SECONDARY RESISTANCE AND RETENTION FORM
PROCEDURE FOR FINISHING EXTERNAL WALLS
FINAL PROCEDURE-CLEANING, INSPECTING,
DESENSITIZING
PRIMARY RESISTANCEFORM PRIMARY RETENTION FORMOUTLINE FORM
