Anatomy & Histology · single question
Which muscle is most commonly affected by occupational strain in dentists?
Show answer and explanation
Correct answer: A. Shoulder muscles (trapezius/supraspinatus)
Shoulder muscles (A) — specifically the trapezius and muscles of the shoulder girdle — are most commonly affected in dentists. The nature of dental work requires sustained static postures with arms elevated, shoulders protracted, and neck flexed. The trapezius (especially upper fibers) bears significant load.
• Prevalence of musculoskeletal disorders in dentistry:
1. Neck/shoulder — most common (~60-70% of dentists)
2. Lower back (~50%)
3. Wrist/hand (carpal tunnel syndrome from vibration and pinch grip)
• Prevention: ergonomic operatory setup, use of loupes with correct declination, balanced operator position (8 o'clock position), regular stretching, use of support props for arms.
• Dental hygienists are at HIGHEST risk among all dental professionals due to scaling technique demands.
• Prevalence of musculoskeletal disorders in dentistry:
1. Neck/shoulder — most common (~60-70% of dentists)
2. Lower back (~50%)
3. Wrist/hand (carpal tunnel syndrome from vibration and pinch grip)
• Prevention: ergonomic operatory setup, use of loupes with correct declination, balanced operator position (8 o'clock position), regular stretching, use of support props for arms.
• Dental hygienists are at HIGHEST risk among all dental professionals due to scaling technique demands.
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