system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Best method for sterilizing complex instruments and delicate materials:
assistant
The correct answer is  Ethylene oxide sterilization is the best method for sterilizing complex instruments and delicate materials.
Porous and plastic materials absorb the gas and require aeration for 24 hours or more before it is safe for them to contact skin or tissues.
Units with large chamber sizes hold more instruments or packs per cycle; however, they are very expensive.
Some chamber designs or sizes are better suited to accept stacks of instrument trays. Manufacturers should be consulted to obtain detailed information about these sterilizers.

Sturdevants operative dentistry 4th edition page 374.