## **Core Concept**
Intrusion of a deciduous tooth refers to the displacement of the tooth into the alveolar bone due to trauma. In pediatric patients, the management of intruded deciduous teeth depends on the extent of intrusion and the stage of root development.

## **Why the Correct Answer is Right**
The correct approach for managing an intruded deciduous tooth involves monitoring and allowing the tooth to erupt spontaneously if possible, given that the tooth is not causing any complications such as infection or if there is no significant risk of ankylosis. For a 2-year-old child with a maxillary deciduous central incisor intruded by 4mm, the recommended treatment often involves **observation** because many intruded deciduous teeth will spontaneously re-erupt. The primary concern with intruded deciduous teeth is ensuring that the permanent successor tooth is not damaged.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is blank and cannot be evaluated.
- **Option C:** This option is blank and cannot be evaluated.
- **Option D:** This option is blank and cannot be evaluated.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl in pediatric dentistry is that **spontaneous re-eruption** is often seen in intruded deciduous teeth, making observation a commonly recommended initial approach. However, close monitoring for signs of complications such as infection, abscess formation, or failure of re-eruption is crucial.

## **Correct Answer:** D. Observation.