Which term describes the removal or destruction of all forms of microbial life on instruments or in processes?

• A. Cleaning
• B. Disinfection
• C. Antisepsis
• D. Sterilization

Answer: (D)

True sterility means destroying every form of microbial life, including bacterial spores, on instruments or in the processing steps. That’s what sterilization accomplishes: a validated cycle that leaves instruments completely free of microbes. In dental practice, you first clean to remove debris, then sterilize using methods like autoclaving (steam under pressure), dry heat, or chemical vapor, with indicators confirming the cycle worked. The other terms describe lower levels of microbial control: cleaning removes debris, disinfection lowers most pathogens on inanimate surfaces but may not kill spores, and antisepsis reduces microbes on living tissue. So the term that best describes complete destruction of all microbial life is sterilization.