The following statements are problems with bonding agents and solutions in various environments or clinical situations. Choose which of these combinations are correct.
Problem: Debonding of a composite core build-up occurred during removal of an impression.
Solution: Compatible composite core material should be used. Certain self-cured composite cores are incompatible with certain light cured bonding agents. Choose a dual cured bonding agent or used a light –cured composite core material.
Problem: A dentist etched tooth structure prior to using a 6th generation bonding agent.
Solution: Sixth generation bonding agents bond effectively to enamel and dentin without prior etching with phosphoric acid. The additional etching could result in over etching of dentin and may lead to nanoleakage.
Problem: After etching, a dentist over dried the tooth.
Solution: Most modern bonding agents bond best to a moist tooth surface. Dentin should be rehydrated by applying a moist cotton pellet until the dentin surface glistens before applying the primer of the bonding agent.
Problem: A ceramic restorative surface has fractured on your patient with a 3-unit anterior FPDPFM, exposing only the fractured porcelain.
Solution: The fractured surface should be isolated, prepared and then micro-etched with 50 um aluminum oxide particles; it is then treated with 5-9% hydrofluoric acid for 4 minutes; ; it is then treated with silane to wet the surface and act as a chemical coupling agent; then the bonding system is applied and light cured; and finally, the composite material is applied incrementally and light cured.
Problem: A dentist uses a standard unfilled bonding agent to bond a laboratory composite restoration.
Solution: Bonding requires agents for both the tooth structure and the undersurfaces of the indirect restoration.
1. is correct
1 and 2 are correct
1, 2, and 3 are correct
1, 2, 3, and 4 are correct
all of the above
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