Question 19 · LDEK · Prosthodontic materials
Polymer powder in addition to its main constituent - methyl methacrylate (MMA) may also contain:
1) addition of other resins (vinyl derivatives, styrene, and dibutyl phthalate);
2) filler substances (zinc oxide);
3) pigments;
4) catalysts (most commonly benzoyl peroxide);
5) inhibitors (hydroquinone, pyrogallol).
The correct answer is:
2) filler substances (zinc oxide);
3) pigments;
4) catalysts (most commonly benzoyl peroxide);
5) inhibitors (hydroquinone, pyrogallol).
The correct answer is:
- A. 1,2,3.
- B. 1,2,3,4.
- C. 3,4,5.
- D. 1,2,5.
- E. 2,3,4,5.
Hint
Ask which component keeps the liquid monomer from setting during storage — it must be in the liquid, not the powder.
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