Initial cavity preparation stage. Presentation Summary : Cavity preparation is the mechanical alternation of defective, injured or diseased tooth in order to best receive a restorative material that will reestablish a. Academia.edu is a platform for academics to share research papers. Use a no.330 bur to extend the occlusal outline through the marginal ridge. Class 6. G.V. 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. Class 2. Class 1. Extend the no.330 bur into the proximal surfaces. Complete a class 1 cavity outline. CLASS I. www.FourthMolar.com Class II cavity preparation for amalgum restoration. 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. The 1.5 mm pulpal depth is measured at the central fissure (Fig. Place bonding agent in a thin layer. Class I, II, and VI Direct Composite Restorations. Step 3 Primary retention form. G.v. 14-3, D and E). Class 6: Cusps of posterior teeth. After the amalgam is removed, the tooth is prepped. The depth of the preparation is modified as needed so that the pulpal wall is established 0.1-0.2 mm into dentin. Keep the bur parallel to the long axis of the tooth. Initial cavity preparation stage Step 1 Outline form and initial depth. Black proposed a classification of carious lesions. Move the bur in a pendulating motion from lingual to buccal. Stages and Steps in Cavity Preparation. Depending on the cuspal incline, the depth of the prepared external walls is 1.5 to 2 mm (Fig. Final cavity preparation stage. Class 1. 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 4: Proximal surfaces of anterior teeth involving incisal angle. Two outline forms can be appreciated Black’s Classification Of Cavity PPT. Displaying class 1 cavity preparation for amalgam PowerPoint Presentations. Class II cavities are on the sides and chewing surfaces of your premolars and molars in the back of your mouth. Amalgam Cavity Preparation Class 1 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Class 5. Step 2 Primary resistance form. Class 5: Gingival third of facial or lingual surfaces of all teeth. 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class 1 cavity preparation

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