New research shows oral suction reduces aerosol droplets

Dental Tribune UK & Ireland

Tue. 25 April 2023

save

Many infectious diseases, such as COVID-19, are known to spread through aerosols and droplets suspended in the air. Therefore, it is necessary to fully understand the hazards of aerosols and droplets presented during dental treatment.

Using a dental air turbine and a mannequin, researchers at Tohoku University recreated the droplets and aerosols that occur during dental procedures. The key is the high-sensitivity camera and high-intensity LED light source, which allowed for high-quality images of the droplet spreading during the simulated procedure, which was previously difficult to do in real-time without dye.

Then, extra-oral suction (EOS) and intra-oral suction (IOS) were used to determine how well these oral suction devices work. Using these techniques, the researchers reduced droplet and aerosol spread within the air by 97.8% when both EOS and IOS were used, and a 92.1% reduction using IOS alone. The researchers published their results in the Journal of Prosthodontic Research.

"Since the droplets and aerosols ('spray' and 'mist') generated during dental treatment contain bacteria and viruses derived from saliva and blood, elucidation of their spreading and diffusion dynamics is required from the perspective of COVID-19 prevention," said Jun Watanabe, author and researcher at Tohoku University. And saliva is not the only component that can aerosolize and cause issues either. Different materials can produce different aerosols; silicon, calcium, potassium, and zinc have been recorded in air samples from dental clinics.

LED imaging visually confirms oral suction device efficacy in droplet and aerosol reduction (Image: Japan Prosthodontic Society)

Inhalation of fine dust, mainly silica, can lead to respiratory issues in frequently exposed individuals. Understanding the spread and diffusion of such particles in the air is a key step in successfully protecting individuals from potentially harmful diseases that can be spread through airborne droplets.

The patient’s treatment can alter the directionality or spread of the droplets. For example, researchers found that treatments for cavities on the anterior teeth are the most likely to be associated with droplet spreading. Furthermore, the correct placement of the oral suction devices is important, with the most effective positioning of the EOS device found to be about 10 centimetres away from the patient's mouth at a 0º angle.

"Analysis in various clinical situations is expected to elucidate the dynamics of dental treatment-derived droplets and aerosols and lead to the establishment of new dental treatment protocols, the development of air purification equipment, and the development of a cleaner and safer dental care environment," said Hiroyasu Kanetaka, author and researcher at the Liaison Centre for Innovative Dentistry at Tohoku University.

While this study confirmed the effectiveness of IOS and EOS at reducing droplets in the air during dental treatment, some limitations will require future testing. The mannequin could not simulate breathing or exhalation, which may produce differing results. Moreover, the mannequin's lack of accurate lip and tongue morphology could also have impacted some results. Further investigations using a patient model will be required to clarify the efficacy of these oral suction devices.

Tags:

To post a reply please login or register

UK makes progress on sugar reduction in yogurts

LEEDS, UK: The UK government has recently taken action to reduce sugar intake in the country and called for industry reformulation of foods that contribute ...

New clinical study confirms link between liver inflammation and periodontitis

HAMBURG, Germany: Periodontal health can contribute to systemic conditions; recent research has found evidence about the links between gum disease and ...

Metformin could help prevent oral and systemic disease in periodontal patients

LONDON, UK: Factors such as glucose metabolism, nutrition, oxidative stress and ageing drive periodontal progression. However, current periodontal ...

2021 Invisalign Scientific Symposium presents efficacy and applicability of clear aligners

LONDON, UK: From 2 to 3 July, Align Technology presented its third Invisalign Scientific Symposium, which was held in a digital format for the second time ...

Study confirms CBT to be successful in reducing dental phobia

LONDON, UK: The latest government figures estimate that one in ten people in the UK suffer from dental anxiety. New research from King’s College ...

Report shows sugar reduction goals not yet on track

LONDON, UK: The negative impact that excess sugar consumption has on both oral and overall health is a well-established fact at this point. It comes as ...

3DISC presents expanded digital imaging portfolio in Birmingham

BIRMINGHAM, UK: Dental equipment manufacturer 3DISC Imaging (Booth B52) is inviting visitors to the Dentistry Show to experience the high diagnostic value ...

Cheap dental X-ray device puts users and patients at risk

LONDON – The British Medicines and Healthcare products Regulatory Agency (MHRA) has warned dentists about a hand-held X-ray device that exposes users ...

Philips’ portfolio for a complete oral health and vitality continuum

There are very few dental companies which can provide a full dental wellness and vitality continuum to ensure both better health and aesthetic outcomes for ...

Identifying and communicating enamel erosion to patients using intra-oral scanning

Gastro-oesophageal reflux disease (GORD) and its potential effects on tooth enamel was the subject of a recent Align Technology webinar. It was presented by...

Education

Live webinar
Thu. 18 April 2024
4:00 pm UTC (London)