Which of the following methods of instrument sterilization uses the lowest temperature?
Ethylene oxide method.
Steam autoclave.
Dry heat oven.
Alcohol autoclave.
Glass bead sterilizer.
1 explanations
oneguy
(1) Steam autoclave works by subjecting instruments to high pressure saturated steam at 121 °C for around 15–20 minutes.
(2) The proper time and temperature for Dry-Heat sterilization is 160°C (320°F) for 2 hours or 170°C (340°F) for 1 hour.
(3) Glass bead sterilizer is a chair-side sterilization of small dental hand instruments, especially endodontic files. The files were placed in 225 °C or 250 °C heated glass bead sterilizers for 10-15 sec.
(3) Ethylene oxide gas is commonly used to sterilize objects sensitive to temperatures greater than 60 °C and / or radiation such as plastics, optics and electrics. Ethylene oxide method is generally performed between 30 °C and 60 °C with relative humidity above 30% and a gas concentration between 200 and 800 mg/l, and needs for at least three hours.
oneguy