The Questions Usually will be Asked About Dental Autoclave

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Today to introduce something about the dental autoclave sterilizer. There are some frequently questions asked:

Q1: What is an steam dental autoclave?
A: An steam sterilizer (autoclave) is a device that uses steam to sterilize equipment and other objects. This means that all bacteria, viruses, fungi,

and spores are destroyed. Autoclaves work by allowing steam to enter and maintaining extremely high pressure for at least 15 minutes. Because

damp heat is used, heat-labile products (such as some plastics) cannot be sterilized or they will melt.

Q2: What is the difference between disinfection and sterilization?
A: Disinfection destroys all the micro-organisms present in a given environment apart from spores: an object that has been disinfected properly

may still transmit a pathogenic micro-organism. Sterilization, on the other hand, is the complete elimination of all micro-organisms including spores.

Q3: What are the main features of steam sterilization?
A: Heat is the best and most used sterilization agent and pressurized, saturated water vapor is the most efficient method of heat transmission. That

is why steam sterilization reduces the time and the temperature needed for the treatment: at 134℃ an exposure of only 4 minutes is sufficient, at

121℃ a time of 15 minutes is enough. In addition, steam sterilization creates no toxic or dangerous residues on objects and does not damage

instruments (provided that they can withstand the temperatures reached).

Q4: What autoclave should I use (class B, class S or Class N)?
A: What autoclave you should use is determined by the type of instruments that you sterilise.
If you sterilise Hollow Load Type A & B instruments, you will need an autoclave capable of running a Type B Cycle. These autoclave are usually

called Class B sterilizers.

Q5: Top-loading autoclaves or front-loading autolcaves? Horizontal or vertical type autoclaves?
A: Many sizes of lab sterilizers are available as either top- or front-loading; which suits you best? Top loaders conserve space, but can be

cumbersome if you process heavy loads. Front loaders can’t process as large a load at comparable volume, but pose less of a risk of strain or

repetitive injury to technicians who handle many loads each day.

Q6: What is an autoclave sterilizer class b?
A: Class b autoclave used for sterilizing all objects (solid instruments, porous objects and A and B hollow objects, both packaged and un-


Class N autoclave used for sterilizing only un-packaged solid instruments;

Class S autoclave used for sterilizing un-packaged solid instruments plus one other of the types indicated for cycle B (to be specified by the


Class B autoclaves are the autoclaves that can carry out cycle B and thus can sterilize any kind of object.