Final answer:
The dental assistant should maintain an ergonomic position to avoid musculoskeletal strain, use proper seating, take breaks, and use ergonomically designed equipment to support good posture while assisting the dentist.
Step-by-step explanation:
When assisting the dentist, it is important to maintain an ergonomic position that minimizes deviation from a neutral posture to prevent musculoskeletal strain. Ideally, the assistant should adjust the patient's chair and use proper seating to maintain a position that allows for the efficient use of instruments and visual access to the oral cavity without strain. Regular breaks, stretching, and alternating tasks can also help to minimize physical strain. Ergonomically designed dental equipment can further support the assistant's efforts to maintain a good posture.