Theoretical Perspectives on Dental Materials

What is recommended for dentists to use when selecting an amalgam alloy?

• ADA-accepted, high-copper alloys.

• Low-copper alloys.

• Non-ADA accepted alloys.

• High-silver content alloys.

What effect does moisture have on zinc-containing amalgams?

• Zinc-containing amalgams are more affected by moisture, leading to increased corrosion and reduced clinical longevity.

• Moisture has no effect on zinc-containing amalgams.

• Moisture improves the strength of zinc-containing amalgams.

• Moisture makes zinc-containing amalgams more resistant to wear.

Why is finishing and polishing important for amalgam restorations?

• Finishing and polishing produce a smooth and lustrous surface that reduces the likelihood of corrosion and the ability of plaque to adhere to the surface.

• They make the restoration more colorful.

• They increase the size of the restoration.

• They make the restoration invisible.

What is the most significant danger from mercury vapor in dentistry?

• Mercury has a high vapor pressure and evaporates at room temperature, posing a risk when inhaled.

• Mercury is highly flammable and can cause fires in dental offices.

• Mercury reacts with dental materials, causing them to degrade quickly.

• Mercury is a strong allergen and causes immediate allergic reactions in most patients.

What is another name for direct gold used in dental restorations?

• Cohesive gold

• Amalgam

• Composite resin

• Porcelain

Which of the following is a characteristic of gold foil restorations?

• High strength

• Long-lasting

• Used for large restorations

• Commonly used in young patients

What is the purpose of finishing and polishing dental amalgam?

• To produce a smooth and lustrous surface that reduces corrosion and plaque adherence.

• To increase the weight of the dental amalgam.

• To change the color of the dental amalgam.

• To make the dental amalgam edible.

According to the text, what is the role of the manufacturer in the context of dental amalgam?

• The manufacturer controls the alloy composition, particle shape, particle size, and particle size distribution.

• The manufacturer is responsible for the marketing and sales of dental amalgam.

• The manufacturer provides dental amalgam to dental clinics at a discounted rate.

• The manufacturer ensures the dental amalgam is environmentally friendly.

What does Figure 6.13 depict?

• gold foil restoration isolated with a #212 (butterfly) retainer and rubber dam

• dental implant procedure in progress

• cavity preparation for a composite filling

• orthodontic bracket placement