**Question:** Bruxism should be treated by night guard using:

A. Acetaminophen
B. Fluoride toothpaste
C. Cognitive-behavioral therapy
D. Propranolol

**Core Concept:**
Bruxism is a repetitive jaw-clenching and teeth-grinding habit that can lead to dental wear, jaw pain, and sleep disturbances. Treatment options for bruxism include behavioral therapies, pharmacotherapy, and non-pharmacological interventions like night guards.

**Why the Correct Answer is Right:**
Correct Answer: **C. Cognitive-behavioral therapy (CBT)**

CBT is a psychological intervention that aims to modify maladaptive thoughts, attitudes, and behaviors. In the context of bruxism treatment, CBT helps patients identify triggers and learn relaxation techniques to reduce teeth grinding during sleep.

**Why Each Wrong Option is Incorrect:**
A. **Acetaminophen (A):**
- Acetaminophen is an analgesic and antipyretic medication. It is not a behavioral or psychological intervention, and thus is not an appropriate treatment for bruxism.

B. **Fluoride toothpaste (B):**
- Fluoride toothpaste helps prevent dental caries by strengthening tooth enamel. It does not address the underlying psychological or behavioral factors associated with bruxism.

D. **Propranolol (D):**
- Propranolol is a beta-blocker primarily used for cardiovascular conditions like hypertension, angina, and arrhythmias. It is not a suitable treatment for bruxism as it does not address the behavioral or psychological factors contributing to the condition.

**Clinical Pearl:**

**Correct Answer: C. Cognitive-behavioral therapy (CBT)**

CBT is a valuable tool in the treatment of bruxism, as it helps patients understand and modify their thoughts, behaviors, and sleep habits to alleviate teeth grinding. By addressing the psychological and behavioral components associated with bruxism, CBT provides an effective intervention for this condition.