restorative resins and luting agents- QUESTIONS ONLY

lecture given 4/16/2026- included bc we only got thru half of the lecture on the first exam

Eugenol containing temporary materials should be used when planning for a final composite resin restoration.

A. True

B. False

B. False

Polymerization in light cured composite resins is generally initiated by

A. Blue light.

B. Infrared Light.

C. Red Light.

A. Blue light.

The instructions for the bonding agent say to gently dry the tooth after application. To make sure it is dry, you blow air on the tooth for 1 minute. You bond the ceramic restoration to the tooth but the patient comes back to you after 1 week because it fell out. You notice that all the cement is stuck to the crown but none to the tooth. What is the most likely cause?

A. The ceramic was contaminated.

B. The collagen fibers in the dentin collapsed.

C. You forgot that you were not in the SLC and you tried to blow on the tooth to dry it.

B. The collagen fibers in the dentin collapsed.

You just graduated from Dental School and you need to buy composite resin. A single tube cost $200, a kit costs $2,000. One company offers 6 different types that they claim you need. You want to minimize your inventory but get the best material for all types of direct composite resin restorations? Of the following which best matches your requirement.

A. Nano-hybrid

B. Macrofill

C. Minifill

A. Nano-hybrid

If the index of refraction of the polymer matrix of the composite resin does not match that of the filler, it will appear?

A. Translucent

B. Opaque

C. Transparent

B. Opaque

One advantage of Bulk fill composite resins is:

A. There might be less porosity in the final restoration.

B. Translucency is always better than incremental fill.

C. Modulus is lower.

A. There might be less porosity in the final restoration.

Why do many composite resins need to be filled incrementally at 2 mm thickness values:

A. Make sure each layer is cured.

B. Decrease shrinkage stress in the restoration.

C. A and B

C. A and B

Mechanical properties of composite resins increase as:

A. Filler content increases.

B. Filler content decreases.

C. Filler size increases.

A. Filler content increases.

Wear of the composite resin decreases as filler particle size?

A. Increases.

B. Decreases.

C. Particle size does not affect wear.

B. Decreases.

Ease of polishing and gloss of the composite resin increases as filler particle size?

A. increases.

B. decreases.

C. Filler size has no affect.

B. decreases.

MDP is used to bond to:

A. Zirconia, Alumina, and Titanium

B. Zirconia, Glass Ceramics, and Porcelain

C. Feldspathic blocks, Glass Ceramics, and Porcelain

A. Zirconia, Alumina, and Titanium

You are bonding Vita MKII feldspathic crown on a molar. You acid etch, put bonding agent on the tooth, and fill the crown with a dual cure composite resin cement. It fell off when the patient eats soft bread. What is the most likely cause?

A. You forgot to silane treat the crown.

B. You used hydrofluoric acid.

C. You forgot to light cure the cement.

A. You forgot to silane treat the crown.

You are bonding an e.Max glass ceramic crown on a molar. You acid etch, put bonding agent on the tooth, and fill the crown with a dual cure composite resin cement. It fell off when the patient eats soft bread. What is the most likely cause?

A. You used phosphoric acid.

B. You used hydrofluoric acid.

C. You forgot to light cure the cement.

A. You used phosphoric acid.

where will captain kirk be born?

riverside, iowa