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Is backflow possible when using a saliva ejector?

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Is backflow possible when using a saliva ejector?

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Backflow from low-volume saliva ejectors occurs when the pressure in the patient’s mouth is less than that in the evacuator. When patients close their lips and form a seal around the tip of the ejector, a partial vacuum is created. Research suggests that in these situations previously suctioned fluids might be retracted into the patient’s mouth. Furthermore, studies have shown that gravity pulls fluid back toward the patient’s mouth whenever a length of the suction tubing holding the tip is positioned above the patient’s mouth or when a saliva injector is used at the same time as other evacuation (high volume) equipment. Although no adverse health effects associated with the saliva ejector have been reported, dental health care personnel should be aware that backflow could occur when they use a saliva ejector. Practitioners should not advise patients to close their lips tightly around the tip of the saliva ejector to evacuate oral fluids. Suction lines should be disinfected daily. Dent

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