Question 340 · LDEK · Composites
Indicate the true statements concerning microfilled composites:
1) microfilled composites contain filler particles with a mean diameter of 0.04 μm;
2) polymerization of the composites can be activated by an exposure to visible blue light of 470-480 nm wavelength;
3) microfilled composites contain filler particles with a mean diameter of 0.4 μm;
4) resin-modified glass ionomer cements are used in the atraumatic restorative treatment technique;
5) hybrid composites are known as compomers.
The correct answer is:
2) polymerization of the composites can be activated by an exposure to visible blue light of 470-480 nm wavelength;
3) microfilled composites contain filler particles with a mean diameter of 0.4 μm;
4) resin-modified glass ionomer cements are used in the atraumatic restorative treatment technique;
5) hybrid composites are known as compomers.
The correct answer is:
- A. 1,5.
- B. 2,3.
- C. 1,2.
- D. 4,5.
- E. 2,4.
Hint
Compare the filler sizes of microfilled and microhybrid composites, and recall the absorption peak of camphorquinone.
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