Change search
ReferencesLink to record
Permanent link

Direct link
An electromyographic study of dental work.
KTH, School of Technology and Health (STH), Ergonomics. (Ergonomi)
1991 (English)In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 34, no 7, 953-62 p.Article in journal (Refereed) Published
Abstract [en]

Musculoskeletal disorders are common among dentists, and have been ascribed to the demands of high precision work and sustained static loading in the neck-shoulder region, combined with a flexed and rotated cervical spine. In order to determine muscular load levels during dentistry, activity in neck, shoulder, and arm muscles was recorded using an electromyography technique (EMG). Normalized mean, median, 10th and 90th percentile EMG amplitude levels (% maximal reference contraction, %max-RVC) were calculated during ordinary dental work. Among the muscles investigated, the trapezius muscle on both sides had the highest mean (the right trapezius 9.0% and the left 7.6% of max-RVC) and 10th percentile amplitude levels (both about 2% of max-RVC). The trapezius muscles showed similar myoelectric activity on the right and left side, probably because of similar muscular static load on the both sides. The right extensor carpi radialis muscle had a significantly higher muscular load level than the left one, possibly due to stabilization demands on the dominant wrist during demanding precision work. The infraspinatus muscle had low activity level on both sides, reflecting that the dentists worked with a small degree of arm elevation and external rotation. The dentistry work thus seems to generate relatively high muscular load on both trapezius and dominant extensor-carpi-radialis, and relatively low load on the infraspinatus muscle.

Place, publisher, year, edition, pages
1991. Vol. 34, no 7, 953-62 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:kth:diva-77577DOI: 10.1080/00140139108964837PubMedID: 1915256OAI: diva2:498430
NR 20140805Available from: 2012-02-12 Created: 2012-02-07 Last updated: 2012-02-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed
By organisation
In the same journal
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link