Which methods are used in sterilization?

• A. Ionizing radiation
• B. Liquid chemical sterilants and moist/dry heat
• C. Ultraviolet light only
• D. Alcohol only

Answer: (B)

Sterilization means killing all forms of microbial life, including spores, and it relies on methods that can fully penetrate and inactivate organisms. In salon settings, the standard sterilization methods are moist heat (steam under pressure, like an autoclave) and dry heat (hot air) because, when applied at the proper temperatures and times, they physically destroy microbes. Liquid chemical sterilants are used for heat‑sensitive instruments that can’t withstand heat but still need complete sterilization, again following specific immersion times and conditions. Ultraviolet light can destroy many microbes on exposed surfaces but cannot reliably sterilize complex items or reach into materials, so it’s mainly a disinfectant. Alcohol serves well for disinfection or sanitization but does not reliably kill spores and isn’t a sterilant. Ionizing radiation is a sterilization method in some industries, but it isn’t a routine option in typical salon practice. So, the best answer is that sterilization uses both liquid chemical sterilants and moist/dry heat.