HOSA Dental Terminology Practice

How does intrusion differ from extrusion?

1. Intrusion involves the tooth being pushed into the socket, while extrusion is displacement from it

2. They refer to the same dental injury

3. Intrusion is harmful only to baby teeth, while extrusion affects permanent teeth

4. Extrusion is a benign condition, whereas intrusion is serious

The correct answer is: Intrusion involves the tooth being pushed into the socket, while extrusion is displacement from it

Intrusion refers specifically to a dental condition where a tooth is driven into its socket, often as a result of trauma or injury. This displacement can cause significant damage to the periodontal ligament and surrounding bone, leading to potential complications such as necrosis or loss of the tooth's vitality. On the other hand, extrusion describes a situation where a tooth is partially displaced from its socket, typically also due to trauma. In this case, the tooth may be loosened and may protrude more than its normal position in the gum. Understanding the difference between these two conditions is crucial for proper diagnosis and treatment. The distinction highlights the mechanisms of injury and the resulting dental implications, as the two conditions require different approaches in terms of management and potential interventions.