HOSA Dental Terminology Practice

Percussion involves which of the following actions during a dental examination?

1. Tapping the tooth

2. Measuring gum pockets

3. Taking X-rays

4. Applying pressure to the gum

The correct answer is: Tapping the tooth

Percussion in the context of a dental examination refers specifically to the action of tapping on a tooth to evaluate its condition. This method helps dentists assess the health of the tooth and surrounding structures. When a tooth is tapped, the response can indicate the presence of various conditions such as infection, inflammation, or other dental issues. A painful response might suggest pulpitis or periapical abscess, while a non-painful response usually indicates a healthier tooth. Measuring gum pockets involves checking the depth of the spaces between the teeth and gums, which is more associated with periodontal assessments than percussion. Taking X-rays is a diagnostic tool that provides images of the teeth and jaw structures, but it does not involve any physical action like tapping. Applying pressure to the gum may be used in a general examination but does not specifically align with the technique of percussion. Thus, tapping the tooth is the defining characteristic of percussion during dental evaluations.