National Dental Examining Board of Canada (NDEB) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the National Dental Examining Board of Canada (NDEB) Test. Study with flashcards and multiple choice questions, each question offers hints and detailed explanations. Achieve success in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Zinc containing amalgam restorations demonstrate:

Poorer survival rates compared to non-zinc amalgams
Higher sensitivity to moisture
Lower strength
Better overall survival rates than high copper amalgams not containing Zn

The correct answer is: Better overall survival rates than high copper amalgams not containing Zn

Zinc containing amalgam restorations demonstrate better overall survival rates than high copper amalgams not containing Zn because zinc improves the handling and setting characteristics of the amalgam, leading to a better fit and decreased marginal leakage. Poorer survival rates (option A) and lower strength (option C) are incorrect because zinc improves the strength and durability of the amalgam. Higher sensitivity to moisture (option B) is also incorrect because zinc helps to protect the restoration from moisture and corrosion. Therefore, option D is the most accurate and complete answer.