Class 6: Cusps of posterior teeth. Initial cavity preparation stage. Class 1. Class 2. Step 3 Primary retention form. Move the bur in a pendulating motion from lingual to buccal. Class 4: Proximal surfaces of anterior teeth involving incisal angle. Black’s Classification Of Cavity PPT. When a Class II carious lesion exists without involvement of the occlusal, a slot cavity is prepared which is essentially the proximal portion of the Class II preparation. Depending on the cuspal incline, the depth of the prepared external walls is 1.5 to 2 mm (Fig. Class 5. 14-3, D and E). It is the placement of cavity margins in the positions they will occupy in the final preparation, except for finishing enamel walls and margins and preparing an initial depth of 0.2 – 0.8mm pulpally of DEJ or normal root surface position. Class 3. Extend the no.330 bur into the proximal surfaces. Black proposed a classification of carious lesions. Amalgam Cavity Preparation Class 1 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Stages and Steps in Cavity Preparation. Initial cavity preparation stage Step 1 Outline form and initial depth. 14-3, D and E). Class 2. Class 6. Complete a class 1 cavity outline. Use a no.330 bur to extend the occlusal outline through the marginal ridge. Keep the bur parallel to the long axis of the tooth. Class II cavities are on the sides and chewing surfaces of your premolars and molars in the back of your mouth. 1-7 Because of the improved physical properties of composites and bonding systems, studies typically report successful results for their use in posterior teeth. This restoration shows an old amalgam that needs to be replaced with composite. Class I, II, and VI Direct Composite Restorations. Then place your cavity liner into the preparation before placement of a microhybrid or nanofill dental composite so you can clearly identify the composite on an X-Ray. CLASS I. Step 2 Primary resistance form. The depth of the preparation is modified as needed so that the pulpal wall is established 0.1-0.2 mm into dentin. Class 5: Gingival third of facial or lingual surfaces of all teeth. The 1.5 mm pulpal depth is measured at the central fissure (Fig. Place bonding agent in a thin layer. Class 1. Academia.edu is a platform for academics to share research papers. www.FourthMolar.com Class II cavity preparation for amalgum restoration. After the amalgam is removed, the tooth is prepped. Black's classification system defines five classes of cavity (the sixth class was added later): Class I cavities are in the pits and fissures (cracks) in your teeth. Class 4. Two outline forms can be appreciated Final cavity preparation stage. G.v. G.V. 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