How to prevent the backflow of dental suction unit?

Studies have shown that cross-contamination between patients can result from the backflow of bacteria dislodged from dental suction unit. A PubMed study revealed that the majority of the bacteria isolated from backflow samples were staphylococci, micrococci, and non-fermenting Gram-negative rods. Infectious agents such as Pseudomonas aeruginosa and Staphylococcus aureus were also isolated from backflow fluids. […]