Glass Ionomer Cement is described as a versatile dental cement that is a hybrid of which cements and adheres to enamel, dentin, and metallic materials?

• A. Silicate and polycarboxylate cements.
• B. Zinc phosphate and polycarboxylate cements.
• C. Resin-modified glass cement.
• D. Polycarboxylate and zinc oxide-eugenol cements.

Answer: (A)

Glass ionomer cement is designed to combine the bonding options of two established cements—silicate cements, known for sticking to tooth surfaces and releasing fluoride, and polycarboxylate cements, which chemically bond to tooth structure. Its powder and liquid react to form a matrix that bonds chemically to hydroxyapatite in enamel and dentin, giving adhesion to these tissues. It can also bond to metallic surfaces through interactions with oxide layers on metals, which is why it’s used as a luting cement for restorations involving metal alloys. This dual capability—to adhere to both tooth structure and metals—comes from marrying the properties of those two cement families. The other options describe cements that don’t provide this specific combination of tooth bonding and metal adhesion.