Dental Assistant Practice Exam

What is a mamelon?

1. A deep pit on the tooth

2. A small rounded projection on the incisal edge of newly erupted teeth

3. A type of dental crown

4. A kind of dental filling

The correct answer is: A small rounded projection on the incisal edge of newly erupted teeth

A mamelon is accurately defined as a small rounded projection found on the incisal edge of newly erupted teeth, particularly on incisors. These projections are a normal part of the tooth's anatomy when it first emerges through the gums and are formed during the development of the tooth. Over time, as teeth come into contact with opposing teeth during biting and chewing, these mamelons often wear down and may become less noticeable. Understanding what a mamelon is involves recognizing its role in the development and morphology of teeth. Mamelons serve as indicators of a tooth's age and its eruption status. They are most commonly observed in children, as these features can diminish or completely wear away in adults due to normal wear and tear on the teeth. The other choices do not accurately represent the definition of a mamelon. A deep pit on a tooth refers to a different dental feature, such as a fossa. A type of dental crown suggests a restorative procedure, which is unrelated to mamelons. Lastly, a kind of dental filling denotes a material used to restore a tooth, contrasting with the anatomical characteristics of a mamelon. Hence, the correct identification of a mamelon relates specifically to its formation and appearance on newly erupted incisors.