scholarly journals An experimental approach to analyze aerosol and splatter formation in a dental practice

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Parisa Mirbod ◽  
Eileen A. Haffner ◽  
Maryam Bagheri ◽  
Jonathan E. Higham
Keyword(s):  
Flow Velocity ◽  
Experimental Approach ◽  
Critical Role ◽  
Dental Practice ◽  
Dental Procedures ◽  
Scaling Procedure ◽  
Droplet Sizes ◽  
Droplet Nuclei ◽  
Transmission Of Disease

The flow velocity, trajectories, and size distribution of droplets produced during a dental scaling procedure using a Cavitron ultrasonic scalar (CUS) has been investigated by optical flow tracking velocimetry and shadowgraphy measurements. The droplet sizes are found to vary from 5 -500 µm; these correspond to droplet nuclei that could carry viruses. The droplet velocities also vary between 0.7 m/s and 1.3 m/s. These observations confirm the critical role of aerosols in the transmission of disease during dental procedures, providing invaluable knowledge for developing protocols and procedures to ensure the safety of both dentists and patients especially during COVID-19 pandemic.

scholarly journals Aerosol formation due to a dental procedure: insights leading to the transmission of diseases to the environment

2021 ◽  
Vol 18 (176) ◽  
Author(s):  
Parisa Mirbod ◽  
Eileen A. Haffner ◽  
Maryam Bagheri ◽  
Jonathan E. Higham
Keyword(s):  
Critical Role ◽  
Aerosol Formation ◽  
Dental Instruments ◽  
Dental Procedures ◽  
Droplet Sizes ◽  
Scaling Process ◽  
Confined Environment ◽  
Oral Conditions ◽  
Droplet Nuclei

As a result of the outbreak and diffusion of SARS-CoV-2, there has been a directive to advance medical working conditions. In dentistry, airborne particles are produced through aerosolization facilitated by dental instruments. To develop methods for reducing the risks of infection in a confined environment, understanding the nature and dynamics of these droplets is imperative and timely. This study provides the first evidence of aerosol droplet formation from an ultrasonic scalar under simulated oral conditions. State-of-the-art optical flow tracking velocimetry and shadowgraphy measurements are employed to quantitatively measure the flow velocity, trajectories and size distribution of droplets produced during a dental scaling process. The droplet sizes are found to vary from 5 µm to 300 µm; these correspond to droplet nuclei that could carry viruses. The droplet velocities also vary between 1.3 m s −1 and 2.6 m s −1 . These observations confirm the critical role of aerosols in the transmission of disease during dental procedures, and provide invaluable knowledge for developing protocols and procedures to ensure the safety of both dentists and patients.

scholarly journals Knowledge and Behavior of Dentists, and Practice Modifications in Response to the Outbreak of Novel COVID-19 in Dentists of Pakistan

2021 ◽  
Vol 30 (04) ◽  
pp. 261-266
Author(s):  
Nosheen Sarwar ◽  
◽  
Saba Ansar ◽  
Momminah Qamar
Keyword(s):  
Dental Students ◽  
Public Hospitals ◽  
Dental Practice ◽  
Who Guidelines ◽  
Dental Procedures ◽  
Current Outbreak ◽  
New Guidelines ◽  
And Behavior ◽  
Transmission Of Disease ◽  
Anxiety And Fear

OBJECTIVES: The current study is conducted to assess the knowledge and behavior of dentists in Pakistan and various practice modifications adopted in response to current outbreak of COVID-19. METHODOLOGY: Well-constructed online questionnaires were distributed among 300 subjects including dental students (3rd year and 4th year), house surgeons, and dental surgeons of two public hospitals of Punjab, Pakistan. RESULTS: 90% of dentists are afraid of getting the infection and reluctant to continue their dental practice. Most of the dentists 95% are aware of the mode of transmission of disease and follow WHO guidelines but still a large number of dentists are in fear and anxious to perform only emergency dental procedures. CONCLUSION: Most dentists resume their dental practice by following WHO new guidelines related to practice in COVID -19 outbreak but still a significant number of dentists close their dental practice for an indefinite period due to anxiety and fear of being ill or got infected by COVID-19. KEYWORD: anxiety and fear, practice modifications, outbreak, COVID-19, knowledge and behavior

The Role of the SLP in Autism Spectrum Disorder Screening and Assessment

2008 ◽  
Vol 15 (2) ◽  
pp. 50-59 ◽  
Author(s):  
Amy Philofsky
Keyword(s):  
Language Development ◽  
Critical Role ◽  
Children With Autism ◽  
Autism Spectrum ◽  
Children With Asd ◽  
Prevalence Estimates ◽  
Notable Increase ◽  
Screening Assessment ◽  
Critical Components

AbstractRecent prevalence estimates for autism have been alarming as a function of the notable increase. Speech-language pathologists play a critical role in screening, assessment and intervention for children with autism. This article reviews signs that may be indicative of autism at different stages of language development, and discusses the importance of several psychometric properties—sensitivity and specificity—in utilizing screening measures for children with autism. Critical components of assessment for children with autism are reviewed. This article concludes with examples of intervention targets for children with ASD at various levels of language development.

A critical role of iNOS-derived Nitric Oxide (NO) and progesterone in implantation

1998 ◽  
Vol 5 (1) ◽  
pp. 115A-115A
Author(s):  
K CHWALISZ ◽  
E WINTERHAGER ◽  
T THIENEL ◽  
R GARFIELD
Keyword(s):  
Nitric Oxide ◽  
Critical Role

Bridging the Gap between Ethical Climate and Nurses’ Service Behaviors: the Critical Role of Professional Well-Being

2018 ◽  
Vol 20 (3) ◽  
pp. 99-110
Author(s):  
Na Zhang ◽  
Jingjing Li ◽  
Xing Bu ◽  
Zhenxing Gong ◽  
Gilal Faheem Gul
Keyword(s):  
Ethical Climate ◽  
Critical Role ◽  
Well Being

Bridging the Knowledge Gaps in Arrhythmogenic Cardiovascular Conditions: The Critical Role of Registries

2016 ◽  
Vol 10 (2) ◽  
pp. 1 ◽  
Author(s):  
Melody Hermel ◽  
Rebecca Duffy ◽  
Alexander Orfanos ◽  
Isabelle Hack ◽  
Shayna McEnteggart ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Natural History ◽  
Risk Stratification ◽  
Critical Role ◽  
Knowledge Gaps ◽  
Level Of Evidence ◽  
The Future

Cardiac registries have filled many gaps in knowledge related to arrhythmogenic cardiovascular conditions. Despite the less robust level of evidence available in registries when compared with clinical trials, registries have contributed a range of clinically useful information. In this review, the authors discuss the role that registries have played – related to diagnosis, natural history, risk stratification, treatment, and genetics of arrhythmogenic cardiovascular conditions – in closing knowledge gaps, and their role in the future.

Sign in / Sign up

Export Citation Format

Share Document