National Dental Examining Board of Canada (NDEB) Practice Exam

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Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

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The bond between porcelain and metal in a ceramometal (porcelain bonded to metal) crown is:

Mechanical
Chemical
Physical
Electrical

The correct answer is: Chemical

Porcelain bonded to metal crowns utilize a chemical bond between the two materials. This is because the porcelain is fused to the metal using an adhesive material, creating a strong bond through chemical reactions. The bond is not purely mechanical, as there is no interlocking of the two materials. It is also not physical, as there is no physical attachment or fusion between the materials. And it is not electrical, as there is no flow of electricity between porcelain and metal. Therefore, the correct answer is B, chemical.