Effects of sterilization on periodontal instruments

Area of Science:

• Dental Instruments
• Materials Science
• Sterilization Technologies

Background:

• The sharpness of periodontal instruments is critical for effective treatment.
• Understanding the impact of sterilization on instrument integrity is essential for clinical practice.

Purpose of the Study:

• To evaluate the effects of common sterilization methods on the cutting edges of periodontal curets and scalers.
• To compare the durability of stainless steel versus carbon steel instruments after repeated sterilization cycles.

Main Methods:

• New, sharpened stainless steel and carbon steel instruments were subjected to 10 sterilization cycles.
• Sterilization methods included saturated steam, formalin-alcohol vapor, and dry heat at specified temperatures.
• Instruments were examined using scanning electron microscopy (SEM) before and after sterilization.

Main Results:

• No visual damage was observed on stainless steel instruments sterilized by saturated steam (250°F), formalin-alcohol vapor (270°F), or dry heat (up to 340°F).
• Carbon steel instruments showed no damage after formalin-alcohol vapor (270°F) or dry heat (up to 340°F) sterilization.
• Saturated steam sterilization (250°F) resulted in oxidation and dulling of the cutting edges of carbon steel instruments.

Conclusions:

• Stainless steel periodontal instruments demonstrate excellent resistance to damage from common sterilization methods.
• Carbon steel instruments are susceptible to damage from saturated steam sterilization, impacting their cutting edge integrity.
• Careful selection of sterilization methods is crucial for maintaining the performance of carbon steel periodontal instruments.