ObjectiveTo determine how early musculoskeletal disorders (MSDs) develop in dental
professionals and to explore the potential differences among distinct dental
specialties.Material and Methods271 dental postgraduates majoring in five dental specialties were recruited, i.e.,
orthodontics, prosthodontics, endodontics, periodontics and alveolar surgery. 254
age-matched non-dental postgraduates served as the control. The standardized
Nordic questionnaire on MSDs and a self-report questionnaire regarding correlative
factors (only for dental postgraduates) were answered through emails. Reliability
of responses was assessed applying test-retest method.ResultsThe intraclass correlation coefficient of participants' answers ranged from 0.89
to 0.96. Dental postgraduates had significantly higher prevalence of MSDs than the
control group, especially at neck, upper back and lower back. In all dental
specialties included, high prevalence of MSDs was reported at neck (47.5%-69.8%),
shoulders (50.8%-65.1%), lower back (27.1%-51.2%) and upper back (25.6%-46.5%),
with lower prevalence at elbows (5.1%-18.6%), hips (3.4%-16.3%) and ankles
(5.1%-11.6%). Periodontics students reported the worst MSDs in most body regions
except wrists and knees, which were more prevalent for prosthodontic and alveolar
surgery students, respectively. Furthermore, year of clinical work, clinical hours
per week and desk hours per week were found
as risk factors for MSDs, whereas physical exercise and rest between patients as
protective factors. ConclusionsHigh and specialty-related MSDs afflict dental professionals even since very early
stage of careers. Prevention aimed at the specialty-related characteristics and
the risk/protective factors revealed in this study should be introduced to dental
personnel as early as possible.