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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Brussels South Charleroi Airport (IATA code CRL) is located 60km south of the central train station. Several budget airlines, including Ryanair and Wizzair operate service from this airport to cities such as Barcelona, Belgrade, Budapest, Dublin, Edinburgh, Manchester, Rome, Sofia, Vilnius and Warsaw. With your Thalys ticket you can also take a local train to or from Central-Centraal, Nord-Noord, Schuman and Luxembourg/Luxemburg stations. 2  edit. 3  Fyra, [2]. 4  A Fyra from Amsterdam (2h01, via Schiphol Airport, Rotterdam, Antwerp), connects to Brussels Midi/Zuid.