Which of the following cavity preparation features is important for retention of an amalgam restoration?
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Correct answer: Parallel or slightly convergent walls and a flat floor
Because amalgam does not bond chemically to tooth structure, mechanical retention is essential. Parallel or slightly convergent walls and a flat pulpal floor help resist displacement of the restoration.
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More Amalgam Restoration Assist questions
- What is the approximate proportion of mercury to alloy powder in dental amalgam by weight (traditional amalgam)?
- Which of the following is an advantage of amalgam restorations compared to some other restorative materials?
- What is the purpose of applying a cavity varnish or liner prior to placing amalgam in deep cavities?
- Which of the following is a common error when placing amalgam that may lead to marginal breakdown over time?
- Which instrument is used to carve proximal anatomy and remove excess amalgam adjacent to a matrix band?
- Why is it recommended to layer amalgam in increments rather than fill the cavity in one bulk mass?