In most medical settings, the

control of microorganisms is of

paramount

concern. Decontamination refers

to the destruction or removal of

microorganisms from instruments,

materials, body surfaces, etc.

Many agents and procedures have

been developed to accomplish this

end. It is imperative that you, as a

medical professional, understand

the modes of action, level of

activity and other factors which

influence the effectiveness of

Roselle Dental Sterilization and Disinfection of Dental Instruments.flv

Germicidal systems fall into three

categories:

the process of removing foreign material such as blood, body fluids, or radioactivity. It does not eliminate microorganisms but is a necessary step preceding disinfection or sterilization.

Decontamination:

are substances that

are applied to destroy

microorganisms that are living on

the objects Disinfection does not

necessarily kill all

microorganisms, especially

nonresistant bacterial spores it is

less effective than sterilization,

which is an extreme physical

and/or chemical process .

Some control terms :

Bactericidal drugs are those that kill target organisms. Examples of bactericidal drugs include aminoglycosides, cephalosporins, penicillins, and quinolones.

Bacteriostatic drugs inhibit or delay bacterial growth and replication. Examples of such include tetracyclines, sulfonamides, and macrolides.

Antiseptic:

are antimicrobial substances that

are applied to living tissue/skin to

reduce the possibility of infection

Factors influencing disinfection

Number of microorganisms

Species and type of

microorganism

Physiology of organisms

Environment

Temperature

Factors influencing disinfection

Concentration and Potency of Disinfectants

Duration of Exposure

Water hardness

relative humidity

pH

Sterilization is any process that eliminates (removes) or kills all forms of microbial life,

including transmissible agents (such as fungi, bacteria, viruses, spore forms, etc.) present on:

a surface

contained in a fluid

in medication

in a compound such as biological culture media

Sterilization :

can be achieved by applying the

proper combinations of

,,,

heat

chemicals

irradiation

high pressure

filtration

heat

Denatures proteins

Sara

Al . Amri

Arwa

Al Assiri

Heba

Hawsawi