Subsurface porosity is due to_____________?
Correct answer: B. Thermal changes
- A. Thickness of the resin
- B. Thermal changes
- C. Lack of temperature
- D. Packing past the dough stage
Explanation
Subsurface porosity in acrylic resin commonly results from overheating, which vaporizes monomer within the resin mass; the risk rises in thick sections. Packing beyond the dough stage mainly causes poor adaptation or other packing defects rather than being the principal cause here.
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