From a micriobiological standpoint sanitization is the reduction of infectious agents to an "acceptable" level, whereas sterilization is the removal or inactivation of such agents entirely. A dry prolonged heating regimine at 350°F is guaranteed to throw a wrench into all micriobiological machinery, even for most viruses and prions, although I don't believe I need to worry about contracting scrapie from a homebrew. We have used this methodology (hot-air sterilization oven) in some micriobiology labs I've worked in, where most protocols call for a 2-hour bake at 320-330°F. So...yes...I am sterilizing.