**Question:** The advantage of silver point as obturating material is that it

A. has antimicrobial properties
B. is radiopaque
C. is easy to manipulate
D. is cost-effective

**Core Concept:** Silver point is a dental material used as an obturating material during root canal treatment. Obturation refers to the process of filling the root canal space to prevent bacterial leakage and maintain the structural integrity of the tooth. Silver point is a gutta-percha-based material, which means it is a thermoplastic material that can be melted and shaped to fit the root canal before setting to its final form.

**Why the Correct Answer is Right:** The advantage of silver point as an obturating material lies in its **B. is radiopaque** characteristic. Radiopacity is an essential feature of a root canal obturating material, allowing for proper visualization of the filled root canal during radiographic examination. Silver point has a high concentration of silver particles, which increases its radiopacity compared to other materials.

**Why Each Wrong Option is Incorrect:**

A. **Antimicrobial properties:** While silver has antimicrobial properties, silver point itself does not have antimicrobial activity due to the silver being dispersed in a gutta-percha base. The antimicrobial effect is mainly attributed to the silver ions released from the silver point over time.

B. **Cost-effectiveness:** Silver point is not necessarily the most cost-effective option compared to other obturating materials available in the market. The cost-effectiveness depends on the specific material, brand, and the quantity needed for a particular case.

C. **Ease of manipulation:** While silver point's gutta-percha base makes it easy to manipulate, its radiopacity is due to the silver particles, which might make shaping and adapting to the root canal anatomy more challenging compared to other materials like gutta-percha or mineral trioxide aggregate (MTA).

**Clinical Pearl:** Although silver point has specific advantages like radiopacity, it is essential to consider other factors while choosing an obturating material for a clinical case, like the clinician's experience, the complexity of the root canal anatomy, and the overall prognosis of the tooth.

In summary, silver point is a radiopaque obturating material used in root canal treatment. However, it is crucial to weigh its advantages and disadvantages against other factors in clinical decision-making.