Chronic snorting of cocaine and use of methamphetamines can cause abnormal changes in enamel. Swimmers who spend a lot of time in overchlorinated pools can lose tooth enamel, as can people who work with acids. Excess fluoride ingestion (fluorosis) during childhood can cause mottling of the enamel. Damaged tooth enamel can allow bacteria to more easily invade the tooth and form a cavity.
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Vancouver International Airport (YVR) Location of Vancouver International Airport on a map. Vancouver International Airport is an international airport in Vancouver, British Columbia, Canada. Its IATA code is YVR and is located latitude 49.19 and longitude -123.18 in Canada and operates in PST time zone. It has 65 scheduled arrival routes within Canada and 102 international scheduled routes. Vancouver International Airport tipically handles 19,357,514 passengers per year, ranking as the 2nd busiest airport in Canada.