[Purpose] The purpose of this study was to ergonomically evaluate the work posture of
dentists to examine their subsequent risk of developing musculoskeletal diseases.
[Subjects and Methods] Scenes in which the three dentists performed procedures at their
dental clinics were videotaped. The videotapes of the dentists’ work postures were
evaluated and analyzed by using the Rapid Upper Limb Assessment (RULA) and Quick Exposure
Check (QEC). [Results] The RULA analysis of the dentists’ work posture indicated,
“improvement required” in the posture used to treat the anterior and “instant improvement
required” in the posture used to treat the maxillary second molar. Of all the work
postures studied, the risk was considered particularly high in the lower back and neck,
implying prominent problems in these body parts. The QEC analysis showed that the worst
work posture was that required to treat the maxillary second molar, which led to a high
risk of neck problems and vibrations. [Conclusion] The neck area has the highest risk of
developing musculoskeletal disease. Hence, regular rests and the provision of information
regarding muscle strengthening exercise for the neck are necessary.
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