INITIAL TOOTH PREPARATION:

OUTLINE FORM

Definition – Extension to sound tooth structure at initial depth

1) Include all caries part
2) Place margins on sound tooth structure
3) Remove any caries undermined enamel
4) ideal cavity depth is 0.2-0.75 mm below DEJ / into dentin – floor should end in dentin.
5) Amalgam depth should be 1.5 – 2mm