EFDA Amalgam and Composite Restorations 5

Question 1

Which symptom is MOST consistent with microleakage around a composite restoration?

Accepted Answer

Recurrent caries at the restoration margin months later

Answer

Microleakage allows bacteria and oral fluids to seep under the restoration margin, leading to secondary (recurrent) caries over time.

Question 2

The proper technique for burnishing an amalgam restoration just before initial set is called:

Accepted Answer

Pre-carve burnishing

Answer

Pre-carve burnishing is performed with a large burnisher to adapt amalgam to cavity walls and develop a mercury-lean surface layer before carving.

Question 3

Composite restorations are contraindicated in patients who:

Accepted Answer

Cannot maintain adequate moisture control or have a known methacrylate allergy

Answer

Composite bonding requires a dry field; poor moisture control leads to bond failure, and methacrylate allergy is a contraindication to resin-based materials.

Question 4

When adapting gingival margins of an amalgam Class II restoration, which instrument is MOST appropriate?

Accepted Answer

Gingival margin trimmer

Answer

Gingival margin trimmers are designed to bevel and smooth the gingival floor and walls, creating proper margin angles in Class II preparations.

Question 5

Which of the following BEST describes the purpose of polishing an amalgam restoration 24 hours after placement?

Accepted Answer

Remove surface tarnish and reduce plaque retention by smoothing the surface

Answer

Polishing an aged amalgam removes surface irregularities and tarnish, producing a smooth surface that is more resistant to corrosion and plaque accumulation.

(EFDA) Expanded Function Dental Auxiliary Practice Test

(EFDA) Expanded Function Dental Auxiliary Practice Test

EFDA Amalgam and Composite Restorations 5