To avoid shoulder pain and injuries, which muscle should dentists stretch regularly?

Correct answer: B. Trapezius (or large pectoral muscle)

• A. Gluteus maximus is a lower extremity muscle — not typically the primary concern for dental operator MSDs.
• B. Correct. Dentists commonly develop shoulder, neck, and upper back pain from prolonged awkward postures. Stretching the trapezius muscle (upper back/neck) and large chest muscles (pectoralis major) — which become tight from forward-leaning posture — is recommended as part of occupational health maintenance.
• C. Biceps brachii strain is not a primary occupational concern for dentists.
• D. Tibialis anterior is a leg muscle — not relevant to dental occupational health.