INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

Question: 1 / 1180

What is the main element in amalgam?

Silver

Copper

Zinc

50% Mercury

Amalgam is a type of metal alloy commonly used in dentistry for fillings. The main element in amalgam is mercury, which makes up approximately 50% of the alloy composition. While silver, copper, and zinc may also be present in small amounts, they are not the main element in amalgam. Therefore, options A, B, and C are incorrect. It is important to note that the use of amalgam has been controversial due to the potentially harmful effects of mercury on health. However, the American Dental Association and other organizations have stated that the use of amalgam in dental fillings is safe.

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