**Question:** Which of the following procedures can be replaced by the use of occlusal sealants?

A. Filling
B. Root canal therapy
C. Crown placement
D. Extraction

**Core Concept:** Occlusal sealants are dental materials that are used to fill in the deep pits and grooves of the teeth, preventing plaque accumulation and tooth decay. They are often used as an alternative to dental fillings, particularly for managing caries in occlusal surfaces of permanent molars.

**Why the Correct Answer is Right:** Occlusal sealants, when applied correctly, can effectively prevent dental caries by blocking the access of oral bacteria and food particles to the tooth surface, reducing the risk of decay formation. In contrast, filling (option A) is usually indicated for restoring decayed tooth structures, which is not the primary function of occlusal sealants.

**Why Each Wrong Option is Incorrect:**

A. Filling (option A) is not suitable for occlusal sealants because it aims to restore decayed tooth structures, while sealants are specifically designed to prevent decay.

B. Root canal therapy (option B) is a procedure to treat infected root canals and is unrelated to occlusal sealants, which serve a different purpose in preventing caries.

C. Crown placement (option C) is a procedure to cover and protect a damaged tooth structure, typically used when a significant portion of a tooth is decayed or fractured, and is not related to occlusal sealants.

D. Extraction (option D) is a procedure to remove a tooth, usually recommended when a tooth is severely damaged beyond repair. This option is unrelated to occlusal sealants as well.

**Clinical Pearl:** Utilizing occlusal sealants in appropriate cases can prevent the need for more invasive treatments like fillings, root canal therapy, crown placement, or extraction, thereby preserving tooth structure and reducing the overall treatment burden on the patient.