When is sterile techniques used?

Sterile techniques are necessary in countless situations. Usually anything involving the human body is done using sterile, or aseptic, techniques. This includes but is not limited to: surgery, injections, dentistry, tattooing, piercing just to name a few. Sterile techniques are also used when dealing with animals and doing veterinary procedures. It is very important to use aseptic techniques in the field of microbiology and laboratory work as to not contaminate any experiments. These were just a few examples of situations that call for sterile techniques.