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Effectiveness of Ergonomic Training to Decrease Awkward Postures during Dental Scaling Procedures: A Randomized

Ana Virginia de Santana Sampaio Castilho1, Edgard Michel Crosato2, Silvia Helena de Carvalho Sales-Peres1

  • 1Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, SP, Brazil.

International Journal of Environmental Research and Public Health
|November 13, 2021
PubMed
Summary

Ergonomic training significantly reduced awkward postures in female dentists by 63% during simulated dental scaling. However, the training did not improve head and neck posture, indicating a need for further specialized interventions.

Keywords:
awkward posturesdental ergonomicsdental scalingtraining

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Area of Science:

  • Occupational health and safety in dentistry
  • Ergonomics and biomechanics
  • Clinical research methodology

Background:

  • Existing ergonomic principles often lack effectiveness for neutral posture adoption in dental procedures.
  • The European Society of Dental Ergonomics (ESDE) adapted ISO 11.226:2000, but evidence of its practical effectiveness in reducing awkward dental postures is limited.
  • Awkward postures in dental practice contribute to musculoskeletal disorders, necessitating evidence-based ergonomic interventions.

Purpose of the Study:

  • To evaluate the effectiveness of ergonomic parameters from ESDE and ISO 11226 in reducing awkward postures among female dental surgeons.
  • To assess the impact of ergonomic training on posture during simulated dental scaling procedures.

Main Methods:

  • A randomized clinical trial involving 60 female dental surgeons.
  • Intervention group received ergonomic training based on ISO 11226 and ESDE guidelines; control group received training post-study.
  • Data analyzed using descriptive statistics, generalized linear models (generalized estimating equations), and network analyses.

Main Results:

  • Ergonomic training resulted in a statistically significant 63% reduction in the prevalence of awkward postures (p < 0.001) in the intervention group.
  • Estimated marginal means of non-recommended postures decreased from 9.0 (initial intervention) to 3.4 (final intervention).
  • Network analyses revealed distinct variable correlation patterns between groups, with variations in strength and direction.

Conclusions:

  • Ergonomic training, incorporating ISO 11226 and ESDE adaptations, significantly reduces awkward postures during simulated basic periodontal procedures for female dentists.
  • The training was not sufficiently effective in improving head and neck posture, highlighting an area for future ergonomic research and intervention.
  • Evidence supports the integration of standardized ergonomic principles into dental education and practice to mitigate occupational risks.