It is impossible to completely eradicate all micro organisms from the human body. Indeed this is not desirable as certain micro organisms, which live in the gut, are a necessary part of the food digestion process. The human body is constantly under attack from micro organisms and whenever the body's outer protective lining is breached then the immune system immediately starts to attack those invading micro organisms. However, large numbers of micro organisms remain in the fluid secretions of the gut, nose and mouth and on the dead outer skin where no blood supply exists to carry the defensive immune cells. Every time anybody breathes in an operating theatre many millions of bacteria and viruses are released from the nasal cavity or mouth.
Every effort is made to ensure operating theatres area as free from micro organisms as possible.
Sterilility and Cleanliness in The Dental Surgery Cross Infection Control By virtue of the fact that a typical dental surgery will treat many patients in a single day it is impossible to keep the surgery sterile. Provided recommended cleanliness and sterilization procedures are adhered to patients are at much greater risk of acquiring an infection from hospitalization or indeed from bars or restaurants than from the dental surgery. All dental surgery staff MUST be vaccinated against Hepatitis B and their level of immunity checked at regular recommended intervals. In this context disposable means the item is used only ONCE and then discarded. Wherever possible any object regularly in use in the dental surgery should be disposable.