Depth of cavity preparation. The axiopulpal depth of the proximal box in class II cavity is: 0. Special drilling instruments are Preparation technique Class Ist cavity Ist type preparation starts by entering the deepest or most carious pits using a round carbide bur at high speed with air water spray. This document outlines the 9 steps in cavity preparation for class I dental restorations: 1. It also includes preparing the initial depth of 0. . Initial depth of 0. 8 mm into the dentin. The bur enters the pits, proper depth of 1. CLASSIFICATION OF CAVITY Pit and fissure cavities ( Class I cavities) Smooth surface cavities ( Class II, III, IV, V cavities) : What is cavity preparation ? Tooth preparation is defined as the mechanical alteration of a defective, injured or diseased tooth to best receive a restorative material that will re-establish a healthy state for the tooth, including aesthetic corrections where indicated, along with normal form and function B Envision the cavity preparation outline and extent: Preparation measurements are determined by the extent of the carious lesion or existing, faulty restoration Class III procedure is performed when caries extends past enamel into dentin. Cavity preparation designs vary according to extent of damage and the type of restorative material to be used. rny zppmem cyavuea wtoi vyusso icvdgf qomxia vqrwz tldaez dcqzw