INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the etchant used when bonding glass ceramic?

Monomolecular oxidative layer
Hydrofluoric acid
Sodium citrate
Potassium sulfate

The correct answer is: Hydrofluoric acid

Hydrofluoric acid is the correct etchant used when bonding glass ceramic in dentistry. It is a highly reactive acid that is capable of etching glass and ceramic materials, creating a roughened surface for improved bonding strength. Hydrofluoric acid is specifically designed to interact with the glass content of the ceramic, creating micromechanical retention and enhancing the bond between the ceramic restoration and the dental substrate. The other options are incorrect: - Monomolecular oxidative layer is not the etchant used for bonding glass ceramic. It does not play a role in the bonding process. - Sodium citrate and potassium sulfate are not typically used as etchants for bonding glass ceramic in dentistry. They do not have the ability to etch the ceramic surface effectively like hydrofluoric acid does.