Combining ergonomic risk assessment (RULA) with inertial motion capture technology in dentistry - using the benefits from two worlds

  • Traditional ergonomic risk assessment tools such as the Rapid Upper Limb Assessment (RULA) are often not sensitive enough to evaluate well-optimized work routines. An implementation of kinematic data captured by inertial sensors is applied to compare two work routines in dentistry. The surgical dental treatment was performed in two different conditions, which were recorded by means of inertial sensors (Xsens MVN Link). For this purpose, 15 (12 males/3 females) oral and maxillofacial surgeons took part in the study. Data were post processed with costume written MATLAB® routines, including a full implementation of RULA (slightly adjusted to dentistry). For an in-depth comparison, five newly introduced levels of complexity of the RULA analysis were applied, i.e., from lowest complexity to highest: (1) RULA score, (2) relative RULA score distribution, (3) RULA steps score, (4) relative RULA steps score occurrence, and (5) relative angle distribution. With increasing complexity, the number of variables times (the number of resolvable units per variable) increased. In our example, only significant differences between the treatment concepts were observed at levels that are more complex: the relative RULA step score occurrence and the relative angle distribution (level 4 + 5). With the presented approach, an objective and detailed ergonomic analysis is possible. The data-driven approach adds significant additional context to the RULA score evaluation. The presented method captures data, evaluates the full task cycle, and allows different levels of analysis. These points are a clear benefit to a standard, manual assessment of one main body position during a working task.

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Author:Christian Maurer-GrubingerORCiDGND, Fabian Christian HolzgreveORCiDGND, Laura FräulinORCiDGND, Werner BetzORCiDGND, Christina ErbeORCiDGND, Dörthe BrüggmannORCiDGND, Eileen M. WankeORCiDGND, Albert NienhausORCiDGND, Jan David Alexander GronebergORCiDGND, Daniela Maren OhlendorfORCiDGND
Parent Title (English):Sensors
Place of publication:Basel
Document Type:Article
Date of Publication (online):2021/06/13
Date of first Publication:2021/06/13
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2021/09/08
Tag:dental assistant; dental treatment concept; dentist; ergonomics; human factors; inertial motion units; kinematic analysis; wearable sensors; work place evaluation
Issue:12, art. 4077
Page Number:17
First Page:1
Last Page:17
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Licence (German):License LogoCreative Commons - Namensnennung 4.0