How can aerosols and splatter be reduced?

No matter which ultrasound dental equipment or insert is used, aerosols and splashes are produced, which may spread pathogenic microorganisms and increase the bacteria in the air. Although the use of ultrasound equipment has not been used to record the spread of the disease, the underlying condition exists, so the operator must try to reduce that risk. First, the use of high filtration and appropriate accessories greatly reduces the risk of the operator inhaling contaminated aerosols. Second, before starting treatment, about 1 minute before treatment, the chlorhexine or essential oils of the pre-procedure can reduce the microbial content of aerosols in ultrasonic instruments. In the end, when using ultrasound, a large number of evacuations have been shown to be the best reduction of aerosols. It is recommended by the American dental association and the centers for disease control and prevention. The operator should use one hand to close the tip of the evacuee near the teeth, and the other hand to scale.
However, when the operator works alone, a large number of evacuations may not be a practical option, so the slow saliva injectors are often used because of its maneuverability and ease of use. Unfortunately, when the saliva ejector was used, the aerosol was not removed. Ten studies have shown that a large number of aerosol reducer and a high-volume evacuation device are connected to the ultrasonic pallet and an external evacuation device with the tip positioning device. In addition, there is a new device that can isolate the quadrant and contain a large number of evacuation and optical fiber optic.
Are there other occupational risks?
In addition to aerosol pollution, musculoskeletal and auditory impairments are two other occupational hazards. The effects of pure ultrasound on the health of the nervous system and musculoskeletal health are difficult to separate because dentists and dental hygienists use a variety of instruments that can cause vibrations. Among female dentists and dental hygienists, female dentists and dental hygienists have less power and tactile sensitivity than those of female dentists and nurses who have not been shaken. Other observations show impaired sensory perception in the hands of dominant and non-dominant dentists. Further studies confirm the effects of ultrasonic instruments on nerve and musculoskeletal functions.
Tinnitus is an early sign of deafness, and has been reported in both clinicians and patients using ultrasound. After an ultrasound report, the results of the empirical study of tinnitus were inconsistent with the auditory symptoms of 0% to 50% of subjects. In general, the hearing ability of the dental staff is no different from that of non-dental control, which indicates that occupational exposure to ultrasonic instruments is not harmful to hearing.
Why would you want to cover all of the surface of the teeth and not just remove the detectable sediment?
Because they are biofilm attachment shelters, calculus deposits are of course very important. The pathogenic biofilm is mainly found in deep pockets (> 4 mm), which is not easy to detect, and has a strong resistance to antimicrobial agents and systemic antibiotics. The only way to completely destroy the biofilm is by mechanical removal. Because we can’t see or feel the biofilm, we have to assume that it exists in every aspect of the tooth surface. Therefore, when the instrument is covered with successive, systematic overlapping strokes to cover every square millimeter of the lower tooth surface, it is vital to mechanically interfere with and remove the bacterial colony of the biofilm. Ultrasound machines at low power can perform this task, but do not remove calculus.
Instead, the shallow pocket depth (less than 3mm) may not require Ultrasonic Scaler at all without clinically detectable calculus. A systematic review of the results of the scaling and root planes clearly demonstrated that the initial shallow site measurements could lead to attachment loss. Shallow pouches that do not have inflammation are probably colonies of good bacteria that do not need to be destroyed.