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Multiple Choice: Chapter 41 Cavity preparation Question 1. Which one of the following statements about cavity preparations is FALSE? A Class II cavity preparations for amalgam restorations must be extended onto the occlusal surface to provide adequate retention B If thin walls remain following a multisurface cavity preparation, these should be reduced and a cuspal coverage restoration provided C Resin composite should not be used to restore a cavity with subgingival margins D The ‘slow’ hand piece should be used with water E Parallel-sided fissure burs will create a cavosurface angle that is greater than 90°
