Best material for obturating a root canal of a tooth is:
**Core Concept**
The best material for obturating a root canal of a tooth is one that provides a tight seal, is biocompatible, and resists bacterial penetration. **Gutta-percha** is the most commonly used material due to its properties.
**Why the Correct Answer is Right**
Gutta-percha, when used in conjunction with a **sealer**, provides an excellent seal of the root canal system, preventing bacterial invasion and ensuring the success of the endodontic treatment. It is also **radiopaque**, allowing for easy verification of the fill on radiographs.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not provide the necessary seal and is not typically used for root canal obturation.
**Option B:** Incorrect as it is not the primary material used for this purpose.
**Option D:** Incorrect because, while it may be used in some dental applications, it is not the best choice for root canal obturation.
**Clinical Pearl / High-Yield Fact**
Remember, **gutta-percha** in combination with a suitable **sealer** is the gold standard for root canal obturation due to its ability to provide a long-lasting, bacteria-tight seal.
**Correct Answer:** D. Gutta-percha.