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Negative Pressure Rooms in The Dental Office

Dental professionals, their staff, and patients, are at high-risk, of getting and spreading the COVID-19 virus.  Most treatment procedures, that require the use of a dental drill, produces a significant number of aerosols in the environment.

Practice owners need to act to protect the saftey of their staff , patients and community.

By nature, dentists are at high risk of occupational exposure to several types of microorganisms, aerosol particles, and droplets that live in patients’ saliva and blood in addition to instruments contaminated with saliva, blood, and tissue debris. Because of new CDC guidlines and in attempts to stop the spread of the corona virus dental offices are prevented from using handpieces and ultrasonic handpieces. 

Studies suggest directing airflow through a negative pressure isolation room is a preferred model for protecting healthcare workers during patient care. The Occupational Safety and Health Administration (OSHA) provides guidance on preparing workplaces for COVID-19 and defines steps to reduce employee exposure. Engineering controls, such as installing high-efficiency air filters, increasing ventilation rates, and providing negative pressure ventilation, will minimize hazard exposure. 

The goal of a negative pressure room is simple. If someone is exhaling a virus or other contagion into the air, you create a vacuum—a rather low-pressure vacuum. You have to suck out more air than you are blowing in.

That means an airborne infection isolation room is actually just one big vacuum. Generally speaking, it sucks in air through the gap under the door to the hallway. Yes, that means it’s sucking in air from a common space—meaning the air entering the room isn’t designed to be sterile. Then, an exhaust fan—often located in the bathroom—will eject the diseased air in the room to the outside. 

What are the Features of a Negative Pressure Dental Operatory

  • These rooms have a few other features to maintain negative pressure.
  • The windows can’t be opened and should be sealed.
  • The doors should close automatically.
  • These rooms need to suck in 30% to 40% more air than they are taking in at any moment.

That’s what creates the pressure, or the one-way flow of air.

All central air systems have points in the office where clean air is sucked in to be filtered and cooled, by the air conditioning system.

Dental offices with drop ceilings can easily create a negative pressure room by simply placing the suction point inside the operatory that will be designated as the isolation room.

Adding HEPA filters and adding Ultra Violet Light to HVAC System

The downside of doing it this way is dirty air can potentialy be spread to the entire office. So air filters in the air condition system will need to be upgraded to special HEPA filters and an Ultraviolet air purifier kit needs to be installed into the central air system.

For this we install a special ultra violet light in the air conditioning system. Ultra violet light kills all corona viruses and has many additional benefits.

A HVAc tech will need to inspect your AC system prior to installation.

Local Aerosol Removal System

Dental External Oral Suction Device, Aerosol Suction Machine, Dental Suction Unit, Extraoral Suction Unit, Protect For The Corona-Virus(2019- nCov )

I addition to a negative pressure room we also recommend using a local aerosol removing system.

We recommend this device made by tree dental. 

We are also designing our own removal system please stay tuned for that.

For any inquiries

Text or call us @ 347-791-3311 






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1339 Lincoln Pl Brooklyn NY 11213