History of Dental Autoclave


The autoclave was invented in 1879 by Charles Chamberland, but the concept of using steam in an enclosed space for the purpose of preventing sickness had already existed since 1679.
Unlike most processes going on in today’s laboratories and hospitals, sterilization has occurred using very much the same principles and methods for the last 150 years.
Most advances in dentalautoclave technology since that time have revolved around either keeping better track of the process of sterilization to better guarantee the safety of the users or creating new types of sterilization cycles.
History of Dental Autoclave 

Another element of sterilization that hasn’t changed over time is the use of steam as a sterilizing agent.
In order to kill a cell through heat, its temperature must be raised to the point where the proteins in the cell wall break down and coagulate. Steam is a very efficient medium for transferring heat, therefore it is an excellent way to destroy microbes. Air, on the other hand, is a very inefficient way to transfer heat/energy when compared to steam because of a concept called the Heat of Evaporation.
To bring one liter of water to the boiling point (100˚C) requires 80kcal of heat energy. Converting that liter of water to steam requires 540kcal — this means that steam at 100˚C contains seven times as much energy as water at 100˚C.
It’s that energy that makes steam so much more efficient at destroying microorganisms. When steam encounters a cooler object, it condenses into water and transfers all the energy that was required to boil it directly into it, heating it up far more efficiently than air at similar temperatures.
In short, steam is how we achieve sterility in the sterilization process.

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