Design and evaluation of an arm support for prevention of MSDS in dentists

Abstract

Based on the previous study among the dentists in India; neck, shoulder and back are at high risk of Musculoskeletal Disorders (MSDs). The same study suggests that, providing an arm support does have direct effect on reduction of pain in high risk areas. The purpose of this study is to design an arm support (extension) to fulfill this need. Various geometries of dental chairs have been considered to make sure it is compatible with most of the unit chairs. A 3D CAD model has been created using CATIA. This model is fabricated with a plastic 3D printer. Model has been created in such a way to get attached to the head rest of dental units. Dentists with high risk of MSDs were shortlisted from previous study. This population is used for evaluation of device. RULA ergonomic assessment is calculated to support the observation.