Restorative & Materials · single question
Of the following dental materials, which one is LEAST soluble?
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Correct answer: C. Resin Modified Glass Ionomer
Resin Modified Glass Ionomer (C) is the least soluble among the options listed. The addition of resin (HEMA) to the glass ionomer matrix significantly improves its resistance to dissolution by oral fluids, giving it superior marginal integrity compared to conventional glass ionomer.
Solubility ranking (most to least soluble):
1. ZOE — most soluble, used as temporary cement intentionally
2. Zinc Polycarboxylate — moderately soluble
3. Conventional Glass Ionomer — moderate solubility
4. Resin Modified Glass Ionomer — low solubility
5. Pure Resin Cements — least soluble overall
Note: If resin cement was listed, it would be less soluble than RMGI. In this question, RMGI is the best answer available.
Solubility ranking (most to least soluble):
1. ZOE — most soluble, used as temporary cement intentionally
2. Zinc Polycarboxylate — moderately soluble
3. Conventional Glass Ionomer — moderate solubility
4. Resin Modified Glass Ionomer — low solubility
5. Pure Resin Cements — least soluble overall
Note: If resin cement was listed, it would be less soluble than RMGI. In this question, RMGI is the best answer available.
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