Restorative & Preventive Dental Procedures Flashcards

What is the purpose of using a wedge during a Class II amalgam restoration?

Answer: To separate teeth and prevent matrix band overextension gingivally

Wedges separate the teeth slightly to compensate for matrix band thickness and prevent an open gingival margin.

A patient undergoing sealant placement shows a white chalky appearance on the enamel after acid etching. This indicates:

Answer: Proper etching has occurred

A frosty white appearance after etching confirms adequate microporosity has been created for sealant bonding.

Which property of zinc oxide eugenol (ZOE) cement makes it contraindicated under composite resin restorations?

Answer: Eugenol inhibits polymerization of resin-based materials

Free eugenol from ZOE inhibits the free-radical polymerization process, preventing composite resin from fully curing.

During a coronal polish, a patient has intrinsic tetracycline staining. The EFDA should know that:

Answer: Coronal polishing cannot remove intrinsic tetracycline stains

Intrinsic stains are incorporated within the tooth structure and cannot be removed by external polishing procedures.

When applying topical fluoride gel in trays, the maximum recommended time for a single application is:

Answer: 4 minutes

Professionally applied fluoride gel in trays requires 4 minutes of contact time to maximize fluoride uptake into enamel.

In a Class I composite preparation, the EFDA should bevel the cavosurface margin to:

Answer: Increase the surface area for enamel bonding and improve esthetics

Beveling exposes enamel rods for improved acid etching and creates a gradual color transition for better esthetic blending.

Which type of dental material is indicated for a Class V restoration in a high-caries-risk patient due to its fluoride-releasing properties?

Answer: Resin-modified glass ionomer

Resin-modified glass ionomer releases fluoride over time, providing cariostatic benefits ideal for high-risk patients.