On December 11, 1844, American dentist Horace Wells pioneered the use of nitrous oxide as an anesthetic in dental extractions. Since then, the colourless and non-flammable gas has been commonly used for local anesthesia in various medical procedures. Every province in Canada has specific guidelines regarding the use of anesthesia that dental professionals must comply with. At Bite Dentalworks, we practise sedation dentistry in Calgary to help our patients overcome their anxieties and fears before each procedure. A good dentist will always discuss anesthetic management before a procedure and review it thoroughly.