INBDE (Integrated National Board Dental Examination) Practice Exam

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What are the settings for dry heat sterilization?

  1. 160C for 2 hrs

  2. 160C for 1 hr

  3. 121C for 30 min

  4. 134C for 1 hr

The correct answer is: 160C for 1 hr

Dry heat sterilization is a method that uses hot air to sterilize items. The correct setting for dry heat sterilization is 160°C for 1 hour. This specific combination of temperature and time ensures the destruction of all microorganisms, including spores, making the instrument sterile. Option A (160°C for 2 hours) is incorrect because the standard setting for dry heat sterilization is 160°C for 1 hour, not 2 hours. Option C (121°C for 30 minutes) is incorrect as this setting is more commonly associated with moist heat sterilization (autoclaving). Option D (134°C for 1 hour) is incorrect as this temperature is typically used for autoclaving and not dry heat sterilization.

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