Main Article Content
Objectives: The aim of this study was to assess ergonomic risk from working posture and observe the association
between posture awareness and ergonomic risk in the fourth year undergraduate dental students at Mahidol
Materials and Methods: Photographs of students during performing scaling and root planning procedure were
taken. The photographs were analyzed using UTHSCSA Image Tool program. Modified Rapid upper Limb
Assessment method was used to assess ergonomic risk levels. Posture awareness and reasons of their pose
were recorded into questionnaires. Prevalence of ergonomic risk was calculated. The association between
posture awareness and ergonomic risk was statistically analyzed using chi-square test (p=0.05).
Results: All 56 dental students tend to develop musculoskeletal disorder. The data showed that 64.3% and
35.7% of students demonstrated moderate to high ergonomic risk respectively. 45% of students assumed posture
awareness during their performance. There was no statistically significant association between posture awareness
and ergonomic risk. (p=0.611)
Conclusions: The ergonomic risk of developing musculoskeletal disorder from working posture in undergraduate
dental students at Mahidol university was moderate to high. Nevertheless, there was no association between
posture awareness and ergonomic risk.
Musculoskeletal Disorders Among Dentists. J Dent
Assoc Thai 2016; 66: 72-80.
2. Valachi B, Valachi K. Mechanisms leading to
musculoskeletal disorder in dentistry. J Am Dent
Assoc 2003; 134: 1344-50.
3. Dajpratham P, Ploypetch T, Kiattavorncharoen S,
Boonsiriseth K. Prevalence and associated factors of
musculoskeletal pain among the dental personnel in
a dental school. J Med Assoc Thai 2010; 93: 714-21.
4. Kanaparthy A, Kanaparthy R, Boreak N. Postural
awareness among dental students in Jizan, Saudi
Arabia. J Int Soc Prev Community Dent 2015; 5: 107-11.
5. Mohammed KY, Afnan OA. Posture evaluation of
dental students. JKAU Med Sci 2009; 16: 51-68.
6. Harbin AJ, Garbin CA, Diniz DG,Yarid SD. Dental
students’ knowledge of ergonomic postural requirements
and their application during clinical care. Eur J Dent
Educ 2011; 15: 31-5.
7. Corrocher PA, Presoto CD, Campos JA, Garcia PP.
The association between restorative pre-clinical
activities and musculoskeletal disorders. Eur J Dent
Educ 2014; 18: 142-6.
8. Fals MJ, Gonzalez MF, Orozco PJ, Correal SP,
Pernett CV. Musculoskeletal alterations associated
factors physical and environmental in dental students.
Rev Bras Epidemiol 2012; 15: 884-95.
9. Rehman B, Aslam A, Ali A, Tariq A. Ergonomic hazards
to dental surgeons: a cross-sectional study. PODJ
2016; 36: 168-71.