<unk>  is a type of tooth wear. It is defined as the irreversible loss of tooth structure due to chemical dissolution by<unk> s not of bacterial origin. Dental<unk>  is the most common chronic disease of children ages 5–17, although it is only relatively recently that it has been recognised as a dental health problem. There is generally widespread ignorance of the damaging effects of<unk> ; this is particularly the case with<unk>  due to consumption of fruit juices because they tend to be considered as healthy.<unk>  begins initially in the enamel, causing it to become thin, and can progress into dentin, giving the tooth a dull yellow appearance and leading to dentin hypersensitivity. The most common cause of<unk>  is by<unk> ic foods and drinks. In general, foods and drinks with a pH below 5.0–5.7 have been known to trigger dental<unk>  effects. Numerous clinical and laboratory reports link<unk>  to excessive consumption of such drinks. Those thought to pose a risk are soft drinks, some alcohol and fruit drinks, fruit juices such as orange juice (which contain citric<unk>  and carbonated drinks such as colas (in which the carbonic<unk>  is not the cause of<unk> , but citric and phosphoric<unk> . Additionally, wine has been shown to erode teeth, with the pH of wine as low as 3.0–3.8. Other possible sources of erosive<unk> s are from exposure to poorly regulated chlorinated swimming pool water, and regurgitation of gastric<unk> s. In children with chronic diseases, the use of medicines with<unk>  components is a risk factor too. Dental<unk>  has also been recorded in the fossil record and was likely caused by the consumption of<unk> ic fruits or plants.
Acid erosion
Demineralization 
Necrosis
Craterization
Calcification
Inflammaging
Glandular metaplasia
Dysbiosis