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Changes in Dental Hygiene Students' Working Posture Using a Clock Position Guide.

Ju-Hui Jeong1, Ja-Hye Yoo2, Min-Young Lee2

  • 1Department of Dental Hygiene, College of Software and Digital Healthcare Convergence, Yonsei University, Wonju, Korea.

International Journal of Dental Hygiene
|April 17, 2026
PubMed
Summary
This summary is machine-generated.

Dental hygiene students using a clock position guide demonstrated improved working postures and reduced discomfort. This training method establishes neutral positions, benefiting dental professionals.

Keywords:
M‐DOPAIREBARULAclock positionclock position guidedental hygiene students

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Area of Science:

  • Ergonomics in Dental Hygiene
  • Occupational Health and Safety
  • Musculoskeletal Disorder Prevention

Background:

  • Dental hygiene students often adopt non-neutral working postures, increasing the risk of musculoskeletal disorders.
  • Current ergonomic training may not sufficiently address posture optimization during clinical practice.

Purpose of the Study:

  • To evaluate the impact of a clock position guide on the working postures of dental hygiene students.
  • To assess changes in posture using three standardized assessment tools: RULA, REBA, and M-DOPAI.

Main Methods:

  • 31 fourth-year dental hygiene students participated; 28 completed the study.
  • Working postures were video-recorded in self- and guided-positions.
  • Postures were assessed using the Rapid Upper Limb Assessment (RULA), the Rapid Entire Body Assessment (REBA), and the Modified Dental Occupational Posture Assessment Instrument (M-DOPAI).

Main Results:

  • Significant improvements (p < 0.05) were observed in RULA, REBA, and M-DOPAI scores across various clock positions.
  • Positive changes in posture were noted in the wrist, trunk, neck, and legs.
  • Student satisfaction with their working posture significantly increased.

Conclusions:

  • Clock position guides are effective for training dental hygiene students in adopting neutral working postures.
  • This approach helps reduce discomfort and potential musculoskeletal strain in dental professionals.
  • Ergonomic interventions using clock position guides can enhance student training and long-term occupational health.