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Introduction. Musculoskeletal disorders (MSDs) caused by incorrect working posture among dentists is a serious issue and one that leads to decreased productivity and quality of life. Aim. The aim of this study was to evaluate the impact of MSDs caused by postural errors in dental healthcare professionals on the body’s center of gravity through a new and innovative technique – baropodometry. Methods. In this study we included 3 oral healthcare specialists with over 20 years experience of practicing in orthostatism, with confirmed work-related MSDs, and performed a baropodometric analysis on them. Results. According to the analysis, all 3 test subjects had alterations of the body’s center of gravity, with uneven distribution of pressures on the feet being recorded by the baropodometer.  Conclusion. In an effort to maintain a good field of view and workplace in orthostatism, the subject is forced to adopt an non-ergonomic position that leads to uneven weight distribution, shifted center of gravity that eventually cause musculoskeletal disorders.

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The purpose of this research is to point out a controlled vibration quarter car model of a human body in seated position. Its importance is mostly due to the vertical accelerations impact of the human body and be able to control these vibrations. This paper marks these vertical accelerations based on a concentrated mass mathematical damped model. This is first established mathematically and then simulated in Matlab software, its results clarifying the differences between accelerations at different parts of the model and their range. Then the study focuses on the controller built in Simulink. The first part of the study de-scribes the quarter car model with concentrated masses depicting also mass, stiffness, damping and forces repartition.