Figure 10-10.Gravity displacement steam sterilizer.
Navy prevacuum sterilizers will be tested daily using
the Bowie-Dick type test.
Level One Maintenance
The interior of the steam sterilizer should be
cleaned each day before being heated. This simple
procedure can easily be accomplished by using a mild
detergent to wash the surfaces. Follow the wash with a
thorough rinse of plain water. Unless this is done, the
chamber walls will collect mineral deposits and may
become greasy. Do not use wire brushes, steel wool, or
any type of abrasive cleaning compounds on the
sterilizer. The manufacturers directions must be
followed to maintain a properly functioning sterilizer.
If the sterilizer does not appear to function properly,
dental equipment repair personnel should check it at
once. Sterilizers should be spot checked frequently for
leaks in lines and improperly functioning gauges,
dials, thermometers, doors, drain strainers, and valves.
Dry Heat Sterilization
The least expensive form of heat sterilization of
instruments is dry heat. Destruction of micro-
organisms by dry heat in a DTF is accomplished by
using a unit that has been tested and approved by the
FDA as a commercial sterilizer.