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Posterior composite restorations were introduced in the late 1960s and early 1970s. Place bonding agent in a thin layer. Amalgam Cavity Preparation Class 1 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Displaying class 1 cavity preparation for amalgam PowerPoint Presentations. Class 6: Cusps of posterior teeth. 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. Final cavity preparation stage. Initial cavity preparation stage. Move the bur in a pendulating motion from lingual to buccal. Step 3 Primary retention form. Keep the bur parallel to the long axis of the tooth. Class 6. Class 2. Class 4. Depending on the cuspal incline, the depth of the prepared external walls is 1.5 to 2 mm (Fig. G.v. The 1.5 mm pulpal depth is measured at the central fissure (Fig. Class 3. Class 4: Proximal surfaces of anterior teeth involving incisal angle. 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. Extend the no.330 bur into the proximal surfaces. 14-3, D and E). www.FourthMolar.com Class II cavity preparation for amalgum restoration. G.V. Stages and Steps in Cavity Preparation. 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 I, II, and VI Direct Composite Restorations. Class 5: Gingival third of facial or lingual surfaces of all teeth. After the amalgam is removed, the tooth is prepped. Step 2 Primary resistance form. Class 1. Class 1. Black’s Classification Of Cavity PPT. Black proposed a classification of carious lesions. Initial cavity preparation stage Step 1 Outline form and initial depth. 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. Class 2. Use a no.330 bur to extend the occlusal outline through the marginal ridge. 14-3, D and E). Class 5. Complete a class 1 cavity outline. CLASS I. 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. Academia.edu is a platform for academics to share research papers. 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. This restoration shows an old amalgam that needs to be replaced with composite. 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