A 6 year old female child reported with a chief complaint of proclined upper anteriors. Parents give a history of prolonged bottle-feeding and a persistent thumb sucking habit. Clinical examination reveals anterior open bite with proclined upper anterior and retroclined lower anterior teeth and associated tongue thrusting. The tongue thrust seen in this case is:

**Core Concept**
The tongue thrust seen in cases of prolonged thumb sucking and bottle-feeding habit is characterized by an abnormal forward movement of the tongue against the anterior teeth, leading to an anterior open bite. This habituation causes the tongue to develop an abnormal forward posture, which in turn affects the eruption and positioning of the anterior teeth.

**Why the Correct Answer is Right**
The tongue thrust seen in this case is a result of the child's persistent thumb sucking habit and prolonged bottle-feeding. This habit causes the tongue to develop an abnormal forward posture, leading to an anterior open bite and proclination of the upper anterior teeth. The tongue thrust is often associated with a narrow maxillary arch, a high palatal vault, and a Class II skeletal relationship.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe the tongue thrust seen in cases of prolonged thumb sucking and bottle-feeding habit. A "tongue thrust" in this context refers to the abnormal forward movement of the tongue against the anterior teeth, not the tongue's ability to move laterally.
* **Option B:** This option is incorrect because it is not a specific type of tongue thrust associated with prolonged thumb sucking and bottle-feeding habit. A "tongue thrust" in this context refers to the abnormal forward movement of the tongue against the anterior teeth, not the tongue's ability to move upward or downward.
* **Option C:** This option is incorrect because it is not a specific type of tongue thrust associated with prolonged thumb sucking and bottle-feeding habit. A "tongue thrust" in this context refers to the abnormal forward movement of the tongue against the anterior teeth, not the tongue's ability to move laterally or upward.

**Clinical Pearl / High-Yield Fact**
Prolonged thumb sucking and bottle-feeding habit can lead to an anterior open bite, proclined upper anterior teeth, and retroclined lower anterior teeth, often associated with an abnormal forward posture of the tongue.

**Correct Answer: C. Lingual thrust.**

✓ Correct Answer: B. Simple tongue thrust