Frequently eaten foods and drinks below pH 5.0–5.7 may initiate dental<unk> . Extrinsic<unk> ic sources Extrinsic<unk>  is when the source of<unk>  originates from outside of the body.<unk> ic food and drink lowers the pH level of the mouth resulting in demineralisation of the teeth. A variety of drinks contribute to dental<unk>  due to their low pH level. Examples include fruit juices, such as apple and orange juices, sports drinks, wine and beer. Carbonated drinks, such as colas and lemonades, are also very<unk> ic and hence have significant erosive potential. Foods such as fresh fruits, ketchup and pickled food in vinegar have been implicated in causing<unk> . Frequency rather than total intake of<unk> ic juices is seen as the greater factor in dental<unk> ; infants using feeding bottles containing fruit juices (especially when used as a comforter) are therefore at greater risk of<unk> . Saliva acts as a buffer, regulating the pH when<unk> ic drinks are ingested. Drinks vary in their resistance to the buffering effect of saliva. Studies show that fruit juices are the most resistant to saliva's buffering effect, followed by, in order: fruit-based carbonated drinks and flavoured mineral waters, non-fruit-based carbonated drinks, sparkling mineral waters; mineral water being the least resistant. Because of this, fruit juices in particular, may prolong the drop in pH levels. A number of medications such as chewable vitamin C, aspirin and some iron preparations are<unk> ic and may contribute towards<unk> . Certain drugs can cause hyposalivation (low quantity or quality of saliva) which is considered a risk factor for<unk> . Intrinsic<unk> ic sources bulimic person. Intrinsic dental<unk> , also known as perimolysis, is the process whereby gastric<unk>  from the stomach comes into contact with the teeth. This is often secondary to conditions such as anorexia nervosa, bulimia nervosa, gastroesophageal reflux disease (GERD) and rumination syndrome. Dental<unk>  can also occur by non-extrinsic factors. There is evidence linking eating disorders with a range of oral health problems including dental<unk> , caries and xerostomia. Reduced salivary flow rate, a common symptom of bulimia, predisposes an individual to dental<unk>  due to increased vulnerability to the effects of<unk> ic food and drinks. Self-induced vomiting increases the risk of dental<unk>  by a factor of 5.5 compared to healthy controls. Lesions are most commonly found on the palatal surfaces of the teeth, followed by the occlusal and then the buccal surfaces. The main cause of GERD is increased<unk>  production by the stomach. This is not exclusive to adults, as GERD and other gastrointestinal disorders may cause dental<unk> s in children. Behaviour<unk>  often coexists with abrasion and attrition. Abrasion is most often caused by brushing teeth too hard. Any frothing or swishing<unk> ic drinks around the mouth before swallowing increases the risk of widespread<unk> . Sucking citrus fruits can also contribute to<unk> .
Acid erosion
Demineralization 
Necrosis
Craterization
Calcification
Inflammaging
Glandular metaplasia
Dysbiosis