**Question:** Terminal portion of Hertwig's epithelial root sheath will form a tapering tooth root. The terminal portion has been called:

A. Hertwig's Body
B. Odontode
C. Odontogenic Membrane
D. Odontode Terminal Part

**Core Concept:** Hertwig's epithelial root sheath is an essential component of dental development. It is a layer of epithelial cells surrounding the dental papilla in tooth germs, playing a crucial role in tooth root formation.

**Why the Correct Answer is Right:** The correct answer, **Option D**, refers to the specific structure formed from the terminal portion of Hertwig's epithelial root sheath. The "Odontode Terminal Part" accurately describes the tapering tooth root that results from the differentiation and fusion of these cells.

**Why Each Wrong Option is Incorrect:**

A. **Hertwig's Body (Option A)** refers to the entire root sheath, not just the terminal portion involved in root formation.

B. **Odontode (Option B)** is not the correct term for the structure formed from the terminal portion of the root sheath.

C. **Odontogenic Membrane (Option C)** is an unrelated term referring to a layer of mesenchymal cells involved in tooth development, not the terminal portion of the root sheath.

**Clinical Pearl:** Understanding the terminology and differentiation of dental structures is essential for dental professionals to comprehend tooth development, which is crucial for oral health and treatment planning.

**Correct Answer:** **D.** Odontode Terminal Part