EMG-Based Evaluation of Occlusal Splint and Masseter Botox Effects on Head and Neck Muscles

Inclusion Criteria: 1. Having a diagnosis of myofascial pain syndrome 2. No missing teeth 3. No history of previous temporomandibular disorder treatment 4. Absence of an arthrogenic temporomandibular disorder Exclusion Criteria: * Pregnancy or lactation; osteoporosis and bisphosphonate use * Previous botulinum toxin injection to the masseter region * Bleeding disorders or use of anticoagulant medications * Presence of systemic muscular or neurological diseases (e.g., myasthenia gravis, ALS) * Active infection, open wound, or dermatological condition in the facial area * Undergoing other facial aesthetic procedures (e.g., fillers, PRP, etc.) within the last six months * Individuals with severe psychiatric disorders or those on regular psychiatric medications * Patients who are unlikely to comply with the study protocol or complete the follow-up period * Individuals with a body mass index (BMI) outside the normal range, including underweight or overweight participants, will be excluded from the study.