Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 12.667
Filtrar
1.
Appl Ergon ; 99: 103619, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34740072

RESUMO

Low back disorders (LBDs) are a leading injury in the workplace. Back exoskeletons (exos) are wearable assist devices that complement traditional ergonomic controls and reduce LBD risks by alleviating musculoskeletal overexertion. However, there are currently no ergonomic assessment tools to evaluate risk for workers wearing back exos. Exo-LiFFT, an extension of the Lifting Fatigue Failure Tool, is introduced as a means to unify the etiology of LBDs with the biomechanical function of exos. We present multiple examples demonstrating how Exo-LiFFT can assess or predict the effect of exos on LBD risk without costly, time-consuming electromyography studies. For instance, using simulated and real-world material handling data we show an exo providing a 30 Nm lumbar moment is projected to reduce cumulative back damage by ∼70% and LBD risk by ∼20%. Exo-LiFFT provides a practical, efficient ergonomic assessment tool to assist safety professionals exploring back exos as part of a comprehensive occupational health program.


Assuntos
Exoesqueleto Energizado , Doenças Profissionais , Fenômenos Biomecânicos , Eletromiografia , Ergonomia , Humanos , Remoção , Doenças Profissionais/etiologia , Doenças Profissionais/prevenção & controle
2.
Appl Ergon ; 99: 103634, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34753098

RESUMO

There have been recent calls for Human Factors and Ergonomics (HFE) to expand its reach and focus to address larger scale societal and global issues. An area of growing awareness is the issue of the gender data gap, whereby women are under-represented in research data, leading to inequitable outcomes when research findings are used to design real world technologies, products, environments, processes, and policies. The aim of this paper is to showcase how structured HFE methods can be used to address the gender data gap. We applied the Sociotechnical Systems Design Toolkit which involved using causal loop diagrams and abstraction hierarchy modelling from Cognitive Work Analysis to understand the system in which the issue occurs and key pain points, followed by the application of the Design with Intent Toolkit to generate design ideas. A total of 43 ideas were developed that could be implemented by universities to address the research data gap. The application demonstrates the utility of HFE methods in tackling complex issues and offers an opportunity for the HFE community to reflect upon the importance of gender sensitive research practices and gender equity more broadly.


Assuntos
Ergonomia , Tecnologia , Humanos
3.
Appl Ergon ; 98: 103556, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34419785

RESUMO

The high prevalence of work-related musculoskeletal disorders (WRMSDs) has been a concern in the meat-processing industry, owing to the manual nature of the work and the high upper-limb and neck exposure to movements that can lead to WRMSD. The ability to perform an accurate and fast assessment of WRMSDs remains a challenge in industrial environments. Most assessment methodologies rely on standard survey-based methods, which are time- and labor-intensive. In this paper, we present an application of inertial measurement units (IMUs) to measure human activity, and the use of artificial intelligence and machine learning techniques to perform task classification and ergonomic assessments in workplace settings. We present the results obtained by using simple low-cost IMUs worn on slaughterhouse worker wrists to capture information on their movements. We describe the use of this information to detect the risk factors of the wrists/hands that can lead to WRMSDs. The results indicate that by using low-cost IMU-based sensors on the wrists of slaughterhouse workers, we can accurately classify the sharpness of the knife and predict the worker RULA score.


Assuntos
Matadouros , Doenças Musculoesqueléticas , Inteligência Artificial , Ergonomia , Humanos , Aprendizado de Máquina , Doenças Musculoesqueléticas/diagnóstico
4.
Appl Ergon ; 98: 103585, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34562780

RESUMO

This work is directed to an understanding as to how the knowledge of, and the application of human factors and ergonomics (HF/E) can save lives. To achieve this, the paper features an assessment of the achievements of one particular scientist, Neville Anthony Stanton, and how his body of contributions has impacted the realm of ground transportation and, in particular, driver behavior assessment. On the widest scale, it is objectively and obviously the case that Stanton is one of the most fecund scientists of our discipline ever. His impact is evident globally and results not simply from the sum total of his written and published works but through an extensive record of international scientific presentations, mutual investigative collaborations across the globe, and mentoring at all levels of the Academy and beyond. As well as mastering and elucidating the HF/E dimensions of a number of content domains, he has generated vital, and even unique tools and methods through which we can explore and understand the problem space of HF/E. Placing those attainments in context permits us a wider window upon how the discipline itself exerts practical and positive influences across the wide swath of real-world systems.


Assuntos
Ergonomia , Transportes , Humanos
5.
Appl Ergon ; 98: 103597, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34598078

RESUMO

Head Mounted Display (HMD) based Augmented Reality (AR) is being increasingly used in manufacturing and maintenance. However, limited research has been done to understand user interaction with AR interfaces, which may lead to poor usability, risk of occupational hazards, and low acceptance of AR systems. This paper uses a theoretically-driven approach to interaction design to investigate the impact of different AR modalities in terms of information mode (i.e. video vs. 3D animation) and interaction modality (i.e. hand-gesture vs. voice command) on user performance, workload, eye gaze behaviours, and usability during a maintenance assembly task. The results show that different information modes have distinct impacts compared to paper-based maintenance, in particular, 3D animation led to a 14% improvement over the video instructions in task completion time. Moreover, insights from eye gaze behaviours such as number of fixations and transition between Areas of Interest (AOIs) revealed the differences in attention switching and task comprehension difficulty with the choice of AR modalities. While, subjective user perceptions highlight some ergonomic issues such as misguidance and overreliance, which must be considered and addressed from the joint cognitive systems' (JCSs) perspective and in line with the predictions derived from the Multiple Resources Model.


Assuntos
Realidade Aumentada , Óculos Inteligentes , Cognição , Ergonomia , Fixação Ocular , Humanos
6.
Appl Ergon ; 98: 103583, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34634582

RESUMO

In this paper, we discuss the ways in which Neville Stanton has challenged himself, his research colleagues, PhD students, the many co-authors and contributors to his publications, and the entire Ergonomics community to determine what it means for there to be 'consistent standards for how [Ergonomics] methods are described and reported.' Only in this way, can it be possible to make claims about whether or not a method in Ergonomics is effective. Given that he is Chartered as both an Occupational Psychologist and an Ergonomist, it is not surprising that he has been concerned with the question of the reliability and validity of Ergonomics methods. In Occupational Psychology, psychometric and personnel selection methods are expected to exhibit acceptable levels of reliability, but this is an expectation which is still somewhat alien to Ergonomics. Neville's work has been instrumental in raising this issue and in providing approaches which can be used to critically evaluate the methods we use. We think that, despite his ground-breaking work, there is still much to do in the Ergonomics community to create the situation for which he has long argued.


Assuntos
Ergonomia , Projetos de Pesquisa , Humanos , Masculino , Reprodutibilidade dos Testes
7.
Artigo em Inglês | MEDLINE | ID: mdl-34769736

RESUMO

Studies demonstrate that there is a lack of effective ergonomic principles for adopting a neutral posture during the execution of dental procedures. ISO 11.226:2000 Standard, Corr. 1:2006 has been thoroughly evaluated and adapted to the way that dentists work by the European Society of Dental Ergonomics (ESDE). However, after 15 years, no studies that showed strong evidence of effectiveness in reducing the prevalence of awkward posture in applying its parameters within the scope of dental practice were found. The aim of this study was to verify the effectiveness of applying the ergonomic parameters proposed by the European Society of Dental Ergonomics (ESDE) and ISO 11226 in reducing the prevalence of the main awkward postures adopted by female dental surgeons during the execution of dental scaling on a dental mannequin. A randomized clinical trial was carried out with sixty dental surgeons randomly assigned to two groups: the intervention group, who received instructions and theoretical and practical ergonomic training; and the control group, who received the same training only at the end of the study. For data analysis, Software IBM SPSS 27 and RStudio was used. Descriptive statistics were performed to verify the effectiveness of the intervention, and generalized linear models (specifically, generalized estimated equation models) were used. Poisson distribution was carried out with log link function and network analyses. Sixty female dental surgeons participated in the study. Twenty-two were distributed in the intervention group and thirty-eight in the control group. It was found that ergonomic training enabled a 63% reduction in the prevalence of awkward postures and that there was a statistically significant difference (p < 0.001) only in the intervention group. The analyses showed that the estimated marginal means of postures not recommended in the groups' initial control, final control, initial intervention, and final intervention were 8.6, 8.2, 9.0, and 3.4, respectively. The relationship of networks analyses of the variables is shown with different profiles in the control and intervention groups, but the same pattern between the groups only vary in the strength and direction of the correlations. It was concluded that the ergonomic training based on the parameters of ISO 11226 and DIN EN 1005-4, and its adaptations to the dental practice provided by the European Society of Dental Ergonomics, as well as recent studies, contributed significantly to reducing the prevalence of awkward postures adopted by female dentists during the simulation of the basic periodontal procedures; however, it was not effective enough to improve the posture of the head and neck.


Assuntos
Doenças Profissionais , Raspagem Dentária , Ergonomia , Feminino , Humanos , Doenças Profissionais/prevenção & controle , Postura , Prevalência
8.
Artigo em Inglês | MEDLINE | ID: mdl-34769758

RESUMO

Measuring muscle fatigue is one essential and standard method to quantify the ergonomic risks associated with prolonged low-load exposure. However, measuring muscle fatigue using EMG-based methods has shown conflicting results under low-load but sustained work conditions, e.g., prolonged sitting. Muscle stimulation technology provides an alternative way to estimate muscle fatigue development during such work conditions by monitoring the stimulation-evoked muscle responses, which, however, could be restricted by the accessibility and measurability of targeted muscles. This study proposes a computer vision-based method to overcome such potential restrictions by visually quantifying the muscle belly displacement caused by muscle stimulation. The results demonstrate the ability of the developed computer vision-based stimulation method to detect muscle fatigue from prolonged low-load tasks. Current results can be used as a foundation to develop a sensitive and reliable method to quantify the adverse effects of the daily low-load sustained condition in occupational and nonoccupational settings.


Assuntos
Fadiga Muscular , Músculo Esquelético , Computadores , Eletromiografia , Ergonomia
9.
Sensors (Basel) ; 21(22)2021 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-34833676

RESUMO

This paper wants to stress the importance of human movement monitoring to prevent musculoskeletal disorders by proposing the WGD-Working Gesture Dataset, a publicly available dataset of assembly line working gestures that aims to be used for worker's kinematic analysis. It contains kinematic data acquired from healthy subjects performing assembly line working activities using an optoelectronic motion capture system. The acquired data were used to extract quantitative indicators to assess how the working tasks were performed and to detect useful information to estimate the exposure to the factors that may contribute to the onset of musculoskeletal disorders. The obtained results demonstrate that the proposed indicators can be exploited to early detect incorrect gestures and postures and, consequently to prevent work-related disorders. The approach is general and independent on the adopted motion analysis system. It wants to provide indications for safely performing working activities. For example, the proposed WGD can also be used to evaluate the kinematics of workers in real working environments thanks to the adoption of unobtrusive measuring systems, such as wearable sensors through the extracted indicators and thresholds.


Assuntos
Doenças Musculoesqueléticas , Traumatismos Ocupacionais , Fenômenos Biomecânicos , Ergonomia , Gestos , Humanos , Doenças Musculoesqueléticas/diagnóstico , Doenças Musculoesqueléticas/prevenção & controle , Postura
10.
Sensors (Basel) ; 21(22)2021 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-34833788

RESUMO

Attention and awareness towards musculoskeletal disorders (MSDs) in the dental profession has increased considerably in the last few years. From recent literature reviews, it appears that the prevalence of MSDs in dentists concerns between 64 and 93%. In our clinical trial, we have assessed the dentist posture during the extraction of 90 third lower molars depending on whether the operator performs the intervention by the use of the operating microscope, surgical loupes, or with the naked eye. In particular, we analyzed the evolution of the body posture during different interventions evaluating the impact of visual aids with respect to naked eye interventions. The presented posture assessment approach is based on 3D acquisitions of the upper body, based on planar markers, which allows us to discriminate spatial displacements up to 2 mm in translation and 1 degree in rotation. We found a significant reduction of neck bending in interventions using visual aids, in particular for those performed with the microscope. We further investigated the impact of different postures on MSD risk using a widely adopted evaluation tool for ergonomic investigations of workplaces, named (RULA) Rapid Upper Limb Assessment. The analysis performed in this clinical trial is based on a 3D marker tracker that is able to follow a surgeon's upper limbs during interventions. The method highlighted pros and cons of different approaches.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Recursos Audiovisuais , Odontologia , Ergonomia , Humanos , Doenças Musculoesqueléticas/diagnóstico , Postura
11.
J Occup Health ; 63(1): e12292, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34766414

RESUMO

OBJECTIVE: The objective of this study was to predict postural discomfort based on the deep learning-based regression (multilayer perceptron [MLP] model). METHODS: A total of 95 participants performed 45 different static postures as a combination of 3 neck angles, 5 trunk angles, and 3 knee angles and rated the whole-body discomfort. Two different combinations of variables including model 1 (all variables: gender, height, weight, exercise, body segment angles) and model 2 (gender, body segment angles) were tested. The MLP regression and a conventional regression (quadratic regression) were both conducted, and the performance was compared. RESULTS: In the overall regression analysis, the quadratic regression showed better performance than the MLP regression. For the postural discomfort group-specific analysis, MLP regression showed greater performance than the quadratic regression especially in the high postural discomfort group. The MLP regression also showed better performance in predicting postural discomfort among individuals who had a variability of subjective rating among different postures compared to the quadratic regression. The deep learning for postural discomfort prediction would be useful for the efficient job risk assessment for various industries that involve prolonged static postures. CONCLUSIONS: The deep learning for postural discomfort prediction would be useful for the efficient job risk assessment for various industries that involve prolonged static postures. This information would be meaningful as basic research data to study in predicting psychophysical data in ergonomics.


Assuntos
Aprendizado Profundo , Ergonomia , Dor/diagnóstico , Postura , Adulto , Feminino , Humanos , Masculino , Valor Preditivo dos Testes , Análise de Regressão , Medição de Risco/métodos
12.
Br J Hosp Med (Lond) ; 82(11): 1-4, 2021 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-34817257

RESUMO

Ergonomics is the scientific study of people and their working conditions, aiming to improve effectiveness. Improved ergonomics of orthopaedic theatres and equipment would reduce the risk of occupational injury and help to encourage more women into an underrepresented specialty.


Assuntos
Procedimentos Ortopédicos , Ortopedia , Ergonomia , Feminino , Previsões , Humanos
13.
J Contemp Dent Pract ; 22(8): 860-866, 2021 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-34753836

RESUMO

BACKGROUND: Previous evidence indicated that musculoskeletal disorders (MSDs) are highly prevalent among dentists. However, limited data are available on the prevalence and predictors for cervical and lumbar pain, the two most common subtypes of MSDs reported internationally. AIM AND OBJECTIVE: The aim and objective of this nationwide cross-sectional study was to assess the prevalence and predictors of cervical and lumbar pain among dental interns in Saudi Arabia. MATERIALS AND METHODS: Data were collected using an online survey that was distributed to dental interns who graduated during the 2018-2019 academic year from all dental schools in Saudi Arabia. The survey included questions related to sociodemographic characteristics, symptoms of MSDs, and ergonomic preventive practices. Bivariate and multivariate logistic regression analyses were performed to assess several predictors of cervical and lumbar pain among our sample population. RESULTS: Of the 1,552 eligible interns, 889 (57%) completed the survey (mean age: 24.8 years, 55% female), with 65% enrolled at public universities. The overall prevalence of cervical pain was 41%, and the corresponding prevalence for lumbar pain was 32%. Female participants had significantly higher odds of reporting cervical pain [odds ratio (OR): 2.02, p <0.001]. Participants who typically avoid excessive bending and twisting were significantly less likely to report cervical pain and lumbar pain (OR: 0.51, p <0.001, and 0.46, p <0.0001, respectively). CONCLUSION: Cervical pain and lumbar pain are highly prevalent among Saudi dental interns. Female sex was identified as a potential risk factor for cervical pain, and avoiding bending and twisting during dental work was identified as a protective factor for cervical and lumbar pain. CLINICAL SIGNIFICANCE: Our results indicate that cervical and lumbar pain represent relevant health issues for dental students. Our data add further support to the notion that dental schools should consider enhancing training on dental ergonomics, enabling healthier careers for future dentists in Saudi Arabia.


Assuntos
Doenças Musculoesqueléticas , Adulto , Estudos Transversais , Ergonomia , Feminino , Humanos , Masculino , Cervicalgia/epidemiologia , Cervicalgia/etiologia , Arábia Saudita/epidemiologia , Adulto Jovem
14.
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi ; 39(10): 757-762, 2021 Oct 20.
Artigo em Chinês | MEDLINE | ID: mdl-34727657

RESUMO

Objective: To analyze the detection and influencing factors of work-related musculoskeletal disorders (WMSDs) of workers in an automobile manufacturing enterprise in Guangzhou City. Methods: In April 2020, a total of 7065 workers of an automobile manufacturing enterprise in Guangzhou City were selected as research subjects using cluster sampling method. The Nordic Musculoskeletal Questionnaire (NMQ) was used to investigate the detection of WMSDs. Multiple logistic regression analysis was used to analyze the influencing factors of WMSDs. Results: The detection rate of WMSDs was 43.9% (3102/7065) , among which the detection rate of multiple WMSDs was 31.4%. The detection rates of WMSDs in different parts from high to low were as follows: neck (24.5%) , shoulder (21.1%) and ankle (20.1%) . Multivariate logistic regression analysis showed that working experience of 3-8 years, >8 years, age>30 years old, repetitive work every day, multiple repetitions per minute, uncomfortable work posture, frequent overtime work and lack of staff in the department were risk factors for multi-site WMSDs (P<0.05) . Adequate rest time was a protective factor for multi-site WMSDs (P<0.05) . Conclusion: The detection rates of WMSDs in neck, shoulder, ankle, and multisite in automobile manufacturing enterprise are relatively high. The primary risk factors include adverse ergonomic factors and unreasonable organization of labour factors, optimize the work breaks can effectively reduce the risk of disease, effective ergonomic interventions should be carried out to prevent the occurrence of WMSDs among workers in the automobile manufacturing industry.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Adulto , Automóveis , Ergonomia , Humanos , Doenças Musculoesqueléticas/epidemiologia , Doenças Profissionais/epidemiologia , Prevalência , Fatores de Risco , Inquéritos e Questionários
15.
PLoS One ; 16(10): e0258796, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34665845

RESUMO

Traffic police riders are exposed to prolonged static postures causing significant angular deviation of the musculoskeletal, including the lumbar angle (L1-L5). This postural alteration contributes to awkward posture, musculoskeletal disorders and spinal injury, especially in the lower back area, as it is one of the most severe modern diseases nowadays. Thus, the study aimed to evaluate the effect of lumbar support with a built-in massager system on spinal angle profiles among traffic police riders. A randomised controlled trial (pre-testpost-test control design) was used to assess spinal angle pattern while riding the high-powered motorcycle for 20 minutes. Twenty-four traffic police riders were randomly selected to participate and 12 riders were assigned to the control group and 12 riders to the experimental group. The pre-test and post-test were conducted at a one-week interval. Each participant was required to wear a TruPosture Smart Shirt (to monitor spinal posture). The TruPosture Apps recorded the spinal angle pattern. The data indicated that the police riders using motorcycle seat with lumbar support and built-in massager system showed a huge improvement in maintaining posture which only involves slight spinal angle deviation changes from the spinal reference angle throughout the 20 minutes ride. The data collected then were analysed using the Mann-Whitney test and Wilcoxon signed-ranked test to verify a statistically significant difference between and within the control and experimental groups. There were significant differences in all sensors between the control group and experimental groups (p<0.05) and within the experimental group. According to the findings, it can be said that the ergonomic intervention prototype (lumbar support with built-in massager system) successfully helps to maintain and improve the natural curve of the spinal posture. This indirectly would reduce the risk of developing musculoskeletal disorders and spinal injury among traffic police riders.


Assuntos
Ergonomia/instrumentação , Massagem/instrumentação , Motocicletas , Postura/fisiologia , Coluna Vertebral/anatomia & histologia , Adulto , Desenho de Equipamento , Feminino , Humanos , Masculino , Aplicativos Móveis , Polícia , Coluna Vertebral/fisiologia , Tecnologia sem Fio , Adulto Jovem
16.
BMC Public Health ; 21(1): 1869, 2021 10 16.
Artigo em Inglês | MEDLINE | ID: mdl-34656090

RESUMO

BACKGROUND: Many organizational interventions aim to improve working conditions to promote and protect worker safety, health, and well-being. The Workplace Organizational Health Study used process evaluation to examine factors influencing implementation of an organizational intervention. This paper examines the extent to which the intervention was implemented as planned, the dose of intervention implemented, and ways the organizational context hindered or facilitated the implementation of the intervention. METHODS: This proof-of-concept trial was conducted with a large, multinational company that provides food service through contractual arrangements with corporate clients. The 13-month intervention was launched in five intervention sites in October 2018. We report findings on intervention implementation based on process tracking and qualitative data. Qualitative data from 25 post-intervention interviews and 89 process tracking documents were coded and thematically analyzed. RESULTS: Over the 13-month intervention, research team representatives met with site managers monthly to provide consultation and technical assistance on safety and ergonomics, work intensity, and job enrichment. Approximately two-thirds of the planned in-person or phone contacts occurred. We tailored the intervention to each site as we learned more about context, work demands, and relationships. The research team additionally met regularly with senior leadership and district managers, who provided corporate resources and guidance. By assessing the context of the food service setting in which the intervention was situated, we explored factors hindering and facilitating the implementation of the intervention. The financial pressures, competing priorities and the fast-paced work environment placed constraints on site managers' availability and limited the full implementation of the intervention. CONCLUSIONS: Despite strong support from corporate senior leadership, we encountered barriers in the implementation of the planned intervention at the worksite and district levels. These included financial demands that drove work intensity; turnover of site and district managers disrupting continuity in the implementation of the intervention; and staffing constraints that further increased the work load and pace. Findings underscore the need for ongoing commitment and support from both the parent employer and the host client. TRIAL REGISTRATION: This study was retrospectively registered with the Clinical Trials. Gov Protocol and Results System on June 2, 2021 with assigned registration number NCT04913168 .


Assuntos
Serviços de Alimentação , Saúde do Trabalhador , Ergonomia , Humanos , Estudo de Prova de Conceito , Salários e Benefícios , Local de Trabalho
17.
Comput Intell Neurosci ; 2021: 2214971, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34616442

RESUMO

The aim of the presented work is to analyze the ergonomics-related disorders in online education using the fuzzy AHP approach. A group dialogue with online education academicians, online education students, biotechnologists, and sedentary computer users has been performed to spot ergonomics-related disorders in online education. Totally eight ergonomics-related disorders in online education have been identified, and the weight of each disorder has been computed with triangle-shaped fuzzy numbers in pairwise comparison. Furthermore, the ergonomics-related disorders in online education are kept in four major categories such as afflictive disorders, specific disorders, psychosocial disorders, and chronic disorders. These four categories of ergonomics-related disorders in online education are evaluated and compared using fuzzy analytical hierarchical process methodology to get ranked in terms of priorities. The results may be instrumental for taking appropriate corrective actions to prevent ergonomics-related disorders.


Assuntos
Educação à Distância , Ergonomia , Humanos
18.
Artigo em Inglês | MEDLINE | ID: mdl-34639753

RESUMO

When the inventory is arranged in a dental practice, a distinction can be made between four different dental workplace concepts (DWCs). Since the prevalence of musculoskeletal diseases in dental professionals is very high, preventive solution need to be investigated. As the conventionally used DWCs have, to date, never been studied in terms of their ergonomics, this study aims to investigate the ergonomic risk when working at the four different DWCs. In total, 75 dentists (37 m/38 f) and 75 dental assistants (16 m/59 f) volunteered to take part in this study. Standardized cooperative working procedures were carried out in a laboratory setting and kinematic data were recorded using an inertial motion capture system. The data were applied to an automated version of the Rapid Upper Limb Assessment (RULA). Comparisons between the DWCs and between the dentists and dental assistants were calculated. In all four DWCs, both dentists and dental assistants spent 95-97% of their working time in the worst possible RULA score. In the trunk, DWCs 1 and 2 were slightly favorable for both dentists and dental assistants, while for the neck, DWC 4 showed a lower risk score for dentists. The ergonomic risk was extremely high in all four DWCs, while only slight advantages for distinct body parts were found. The working posture seemed to be determined by the task itself rather than by the different inventory arrangements.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Assistentes de Odontologia , Odontólogos , Ergonomia , Humanos , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/epidemiologia , Local de Trabalho
19.
Artigo em Inglês | MEDLINE | ID: mdl-34639850

RESUMO

Musculoskeletal disorder (MSD) is already prevalent in dental students despite their young age and the short duration of dental practice. The current findings state that the causes of MSD are related to posture during dental work. This study aims to investigate the ergonomic risk of dental students. In order to analyze the ergonomic risk of dental students, 3D motion analyses were performed with inertial sensors during the performance of standardized dental activities. For this purpose, 15 dental students and 15 dental assistant trainees (all right-handed) were measured in a team. Data were analyzed using the Rapid Upper Limb Assessment (RULA), which was modified to evaluate objective data. Ergonomic risk was found for the following body parts in descending order: left wrist, right wrist, neck, trunk, left lower arm, right lower arm, right upper arm, left upper arm. All relevant body parts, taken together, exhibited a posture with the highest RULA score that could be achieved (median Final Overall = 7), with body parts in the very highest RULA score of 7 for almost 80% of the treatment time. Dental students work with poor posture over a long period of time, exposing them to high ergonomic risk. Therefore, it seems necessary that more attention should be paid to theoretical and practical ergonomics in dental school.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Fenômenos Biomecânicos , Ergonomia , Humanos , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/epidemiologia , Doenças Profissionais/etiologia , Medição de Risco , Estudantes de Odontologia , Extremidade Superior
20.
Work ; 70(2): 493-508, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34633350

RESUMO

BACKGROUND: The match between classroom furniture and students' anthropometry is an important factor in students' academic performance. OBJECTIVE: Our aim was to investigate the ergonomic suitability of the classroom furniture to the students, and to propose design suggestions for both desks and chairs. METHODS: We analyzed the ergonomics of classroom furniture that students aged 10-14 years old in Turkey currently use. To this end, we selected Maltepe Primary Education School, one of the largest schools in the Çankaya district of Turkey's capital city, Ankara, in which to conduct the study. A sample of 119 students was selected, and seven anthropometric measurements were taken for each of these students. We then calculated five relationships between the dimensions of the furniture and the students' anthropometric measures. RESULTS: We observed high levels of mismatch rates, with an average of 66.6%and high values of over 95%for the relations of two furniture measures, seat depth (related with buttock-popliteal length) and seat-to-desk height (related with elbow height, sitting). Each anthropometric measure was applied a fit probability distribution, and based on those distributions; we suggested the most appropriate classroom furniture dimensions in order to maximize suitability of the furniture to the anthropometric measures in terms of fixed-size (i.e., non-adjustable) classroom furniture. CONCLUSIONS: High mismatch rates can be reduced by 52.0%on average based on the classroom furniture dimensions suggested in this study.


Assuntos
Decoração de Interiores e Mobiliário , Instituições Acadêmicas , Adolescente , Antropometria , Criança , Ergonomia , Humanos , Estudantes , Turquia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...