CONVENIENCE FORM Definition: Convenience form is defined as that form of cavity preparation that allows adequate observation, accessibility and case of operation in preparing and restoring the cavity. Modification in tooth preparation for convenience form: Occlusal step in classII. Labial/lingual access for classIII/classIV. Occlusal divergence of cavity walls in cast restorations. INSTRUMENT MODIFICATION: Contra angling [&hellip

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