The activation of the muscles of the back during work tasks causes fatigue and possible injuries. This is especially common in dentists who perform a large part of their work from a sitting position. There is an investigation of the use of an ergonomic dental assistant stool with breast support in the breastbone to reduce muscular activation of the lower back. Electromyography of the lower back extenders of 30 dentists was evaluated in 20 s under three conditions in random order. This suggests a potential musculoskeletal benefit when using dental stools with a armrest to be breast support.
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