Anatomy & Histology · single question
All of the following INTERFERE with ergonomics in dentistry EXCEPT:
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Correct answer: A. Dental loupes
Dental loupes (A) do NOT interfere with ergonomics — in fact, they IMPROVE ergonomics. Loupes allow the dentist to work at a more upright posture with less neck flexion, reducing musculoskeletal strain. Properly fitted loupes with a declination angle appropriate for the individual's working distance significantly reduce forward head posture and cervical strain.
• Sitting far from the patient (B) forces trunk flexion and shoulder protraction, both major contributors to occupational musculoskeletal disorders in dentists.
• Poor lighting, non-adjustable equipment, and incorrect chair height all force compensatory postures.
• The shoulder and lower back are the most commonly affected regions in dentists due to ergonomic challenges.
• Sitting far from the patient (B) forces trunk flexion and shoulder protraction, both major contributors to occupational musculoskeletal disorders in dentists.
• Poor lighting, non-adjustable equipment, and incorrect chair height all force compensatory postures.
• The shoulder and lower back are the most commonly affected regions in dentists due to ergonomic challenges.
- A. Prolonged static positions reduce blood flow and cause muscular fatigue, clearly interfering with ergonomics.
- B. Repetitive hand movements are a well-known ergonomic risk for carpal tunnel syndrome in dentists.
- C. Poor posture is a major ergonomic risk factor in dentistry, contributing to musculoskeletal disorders.
- D. Dental loupes (magnification glasses) actually IMPROVE ergonomics by allowing the dentist to maintain a more upright posture — they are NOT a source of ergonomic interference.
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