Research & Data
Occupational Injury Statistics for Dentists: A Data Report
2026-06-15 · Jizhou Select Content Team
TL;DR · 30-Second Read
- In the past 12 months, 82.4% of dentists reported at least one musculoskeletal symptom (n=614, Zhang et al. 2021)
- The three most affected sites: neck 75.2%, lower back 50.8%, shoulders 49.7%
- Fatigue and prevalence climb together: the severe-fatigue group shows 96.2% prevalence at any site — while more than 2 work-breaks per day reduce the risk by 60%
Overall Prevalence and Distribution by Body Site
The 2021 cross-sectional survey of 614 dentists by Zhang et al. is one of the most widely cited datasets in this field in China: the 12-month overall MSD prevalence was 82.4%, and even the 7-day prevalence reached 67.8%.
| Body Site | Prevalence in the Past 12 Months |
|---|---|
| Neck | 75.2% |
| Lower Back | 50.8% |
| Shoulders | 49.7% |
| Upper Back | 46.4% |
| Wrists / Hands | 32.1% |
| Hips / Legs | 12.2% |
| Knees | 11.4% |
| Elbows | 7.0% |
| Ankles / Feet | 6.0% |
International data corroborates this: Feng et al. 2014 (n=272) reported that 88% of Chinese dentists had at least one symptom, with the neck highest (83.8%); a 2022 survey of 6,854 healthcare workers by Xu et al. found an industry-wide WMSD prevalence of 56.1% — the burden on dentists is clearly heavier than the healthcare average.
Risk Factors: Which Working Conditions Amplify Risk
The multivariate analysis of the same survey quantified the risk ratios (OR values):
| Risk Factor | Description | Risk Level | OR |
|---|---|---|---|
| More working days per week | Each additional working day per week significantly increases MSD risk | High risk | 1.45× (any site) / 1.55× (neck) |
| Frequent overtime or delayed shifts | Dentists who frequently work overtime have a higher risk of lower-back MSDs | High risk | 2.07× (frequent vs. rare overtime) |
| Working without an assistant (no four-handed dentistry) | Lack of assistant support; four-handed dentistry not practiced | Medium-high risk | 1.80× (lower back) |
| Staff shortage | Insufficient clinic staffing | Medium-high risk | 1.82× |
| Prolonged static postures | Sustained constrained postures such as head-down and forward-leaning positions | High risk | — |
| Uncomfortable working posture | Poor operating posture caused by improperly adjusted equipment | Medium risk | — |
Notably, the top factors are almost all about "how work is organized": scheduling, overtime, assistant support. This explains why prevalence is so consistent across countries and age groups — the way of working is simply too similar.
The Fatigue Gradient and Protective Factors
The same survey also revealed a dose effect of "the more fatigued, the more likely to be ill" — the heavier the fatigue, the higher the prevalence:
| Fatigue Level | Any Site | Neck | Lower Back |
|---|---|---|---|
| None or mild | 69% | 60.3% | 37.9% |
| Moderate | 85.4% | 79.3% | 50% |
| Severe | 96.2% | 89.7% | 67.9% |
The good news: protective factors have equally hard data:
- 1-2 work-breaks per day: 43% lower neck risk; 45% lower lower-back risk(OR 0.57 (neck) / 0.55 (lower back))
- More than 2 work-breaks per day: 60% lower risk at any site; 54% lower neck risk(OR 0.40 (any site) / 0.46 (neck))
- Four-handed dentistry (with assistant): Dentists working without an assistant have 1.80× the lower-back MSD risk of those with an assistant
- Correct ergonomic posture: Significantly reduces MSD incidence
What This Data Means
First, this is not a "small-probability occupational disease" — it is an industry norm at 82.4%. The rational attitude is to prevent it as "a problem every dentist will face."
Second, the highest-risk factors are all modifiable: scheduling, breaks, assistants, equipment. Preventing MSDs does not require expensive investment — it requires recognizing the problem and carrying out the interventions we already know.
Third, equipment is the part that "invests once and works every day." That is why we treat loupes and headlights as occupational-health tools, not merely tools for "seeing more clearly."
References
[1]Correlation Analysis Between Musculoskeletal Disorders and Workload Among Dental Practitioners
Zhang P, Zhang W, Jiang C, Li X, Chen H, Zhang Y, Huang H · Occupational Health and Emergency Rescue, 39(1): 6-11 · 2021 · DOI: 10.16369/j.oher.issn.1007-1326.2021.01.002
A survey investigating the prevalence of musculoskeletal disorders among dental practitioners and their relationship with workload. 614 dentists participated; the overall MSD prevalence was 82.4%.
Feng B, Liang Q, Wang Y, Andersen LL, Szeto G · BMJ Open, 4(12): e006451 · 2014 · DOI: 10.1136/bmjopen-2014-006451
A cross-sectional survey of work-related musculoskeletal disorders among dentists in China (n=272): 88% of dentists reported at least one musculoskeletal complaint, with neck pain the most prevalent (83.8%); long daily working hours, inability to choose appropriately sized instruments, and high job demands were the main risk factors.
[3]Patterns and Influencing Factors of Work-Related Musculoskeletal Disorders in the Chinese Healthcare Industry
Xu Q, Ling R, Liu Y, et al. · Chinese Journal of Disease Control and Prevention, 26(8): 888-896 · 2022
A cross-sectional survey of 6,854 healthcare workers in China: the overall WMSD prevalence was 56.1% (physicians 54.15%, nurses 58.66%); ergonomic load was high in the neck, shoulders, upper back, and lower back, and poor working postures were widespread.