The sterilisation of instruments is central to the infection control proces
s in the dental surgery, with the autoclave being most frequently used for
this process. For effective operation, among other factors, it is essential
that the autoclave is loaded correctly and tested regularly to ensure that
it is operating at a temperature and pressure which will hill all micro-or
ganisms. Biological indicators are another method of verifying the sterilis
ation process, since the sterilisation of the bacterial spores within the t
est ampoule provides a guarantee that sterilising conditions have been achi
eved.