If curing occurs at temperature more than 100°C porosity results in which area of denture______________?
Correct answer: D. Hard thick central area
- A. Porosity is uniformly distributed
- B. Thin Palatal area
- C. Thin area of flanges
- D. Hard thick central area
Explanation
Heating denture acrylic above the boiling point of its monomer produces gaseous monomer porosity, especially in the thick central portion where heat is retained. Thin areas allow heat and monomer vapour to escape more readily.
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