Vital ventilation protects dental patients

According to the British Dental Association, over 14.5 million fewer dental treatments were carried out between the March 2020 lockdown and September 2020 in England compared to the same period in 2019. Due to the pandemic, dentists are not able to see as many patients as they used to since due to COVID restrictions there needs to be a gap between patient treatments to minimise the risk of virus transmission. This is called ‘fallow time’ and has been said to be the biggest barrier to increasing dental appointment capacity.

However, effective ventilation can reduce the fallow time between appointments, reduce the infection rates and keep patients safe by increasing fresh air circulation in dentist surgeries.

Evaluating ventilation systems in dental surgeries is essential to make these spaces safe for both practitioners and patients, as people continue to require dental care throughout the COVD-19 pandemic. The World Health Organisation (WHO) has advised medical personnel to consider taking ‘airborne precautions’. To prevent airborne transmission dental surgeries should be sufficiently ventilated with great emphasis placed on removing bio aerosols caused by aerosol generating procedures (AGP).

Sufficient ventilation can be achieved by increasing the air changes per hour (ACH), the number of times the air is changed per hour in a given space. This provides two benefits. Firstly, it removes viral or bacterial pathogens from the space, crucial in dentistry which involves a lot of procedures that produces aerosols. And secondly, the higher the number of air changes per hour, the shorter the fallow time before the next patient can enter the room.

Fig 1. Infected person talking with non-infected person with ventilation system switched off.

Dave Cook, technical product manager at Vent-Axia, said: “At Vent-Axia we are here to provide ventilation solutions and advice to dental surgeries. Now is the time to check ventilation to ensure there is enough airflow to dilute the virus in the air and improve indoor air quality. Ventilating for longer and opting for ventilation with higher airflow volumes will help reduce the risk.”

The latest Government guidance recommends dentists evaluate the number of air changes in their practices to ensure sufficient ventilation. Where there is ventilation, but the number of ACH are either unknown or are 1 to 5 ACH, the guidance recommends a downtime of 30 minutes fallow time, with mitigation such as high-volume suction/ rubber dam. Where there are 6 to 9 ACH, a downtime of 20 minutes is recommended and where there are 10 or more ACH, there should be a downtime of 15 minutes. It therefore makes sense to dentists to improve ventilation to protect staff and patients as well as allowing more appointments through the day as a result of a shorter fallow time between patients. Electrical wholesalers are well placed to advise electricians on ventilation for dental practices and reassure them that upgrading ventilation doesn’t have to be a big investment for their dental clients – there are affordable options on offer by opting for unitary ventilation. Extract/supply fans, such as the Vent-Axia T- Series, can simply be installed through a window or wall offering little disruption. The only other cost is fan installation – so for a relatively small investment, dentists can benefit from the ventilation they need to reduce fallow time and so see more patients.

Fig 2. Infected person talking with non-infected person with ventilation system switched on.

Vent-Axia’s T-Series commercial fan offers high performance ventilation with low running costs. With both window and wall options available, as well as Lo-Carbon models, it is both durable and reliable. Available with four sizes of extract/intake fans and an easy fit connector Top Socket allowing fast and trouble-free mains connection, the T-Series is easy to install and replace. Alternatively, for ducted applications energy efficient ACM Mixed Flow In-Line fans offer quiet ventilation with two and half times the pressure of conventional axial fans. Their compact design also makes them ideal for many ducted applications and they can operate in both horizontal and vertical positions.

Vent-Axia has created a dedicated web page at www.vent-axia.com/dentist to inform and advise dental surgeries on the vital role of ventilation.

For further information on all products and services offered by Vent-Axia telephone +44 (0)344 856 0590 or visit www.vent-axia.com