“…Its aetiology is multifactorial, and the various disease causes are grouped according to acid origin in intrinsic and extrinsic (Gandara and Truelove, 1999). Intrinsic causes include oral cavity exposure to gastric acids due to abnormalities in the gastrointestinal tract (Ismail‐Beigi et al , 1970; Eccles, 1978; Pope, 1982; Myllarniemi and Saario, 1985; Pace et al , 2008) or recurrent vomiting as a result of psychological disorders (Hellstrom, 1977; Knewitz and Drisko, 1988). Extrinsic factors include the unusual or abusive consumption of demineralizing acidic foods and beverages (Eccles and Jenkins, 1974; Smith and Knight, 1984; Asher and Read, 1987; Johansson, 2002; Dugmore and Rock, 2004) and some medicines such as aspirin, vitamin C (Eriksson and ngmar‐Mansson, 1986; Meurman and Murtomaa, 1986), iron tonics (James and Parfitt, 1953), acidic oral hygiene products or products with calcium chelators, as well as acidic salivary substitutes and salivary flow stimulants as potential erosive products (Zero, 1996).…”