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Examples include iron (black stain), iodine (black), copper (green), nickel (green) and cadmium (yellow-brown). [3] Antibiotics. Tetracycline and its derivatives are capable of intrinsic discoloration (discussed below). However other antibiotics may form insoluble complexes with calcium, iron and other elements that cause extrinsic staining. [11]
The perception of tooth colour is multi-factorial. Reflection and absorption of light by the tooth can be influenced by a number of factors including specular transmission of light through the tooth; specular reflection at the surface; diffuse light reflection at the surface; absorption and scattering of light within the dental tissues; enamel mineral content; enamel thickness; dentine colour ...
The majority of elderly people have at least one chronic condition, with many having multiple. The most common of these include hypertension, arthritis, heart disease, cancers and diabetes. [18] Other prevalent conditions include dementia, depression, hearing loss, cataracts, back and neck pain, and chronic obstructive pulmonary disease. [19]
The International Association for the Study of Pain defines burning mouth syndrome as "a distinctive nosological entity characterized by unremitting oral burning or similar pain in the absence of detectable mucosal changes" [1] and "burning pain in the tongue or other oral mucous membranes", [8] and the International Headache Society defines it ...
Cetylpyridinium chloride is known to cause tooth staining in approximately 3 percent of users. [14] The Crest brand has noted that this staining is actually an indication that the product is working as intended, as the stains are a result of bacteria dying on the teeth. [15]
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One of the physical changes can be the colour of teeth. Dental erosion can lead to two major tooth colour change – the first being a change of colour that usually happens on the cutting edge of the central incisors. This causes the cutting edge of the tooth to become transparent. [17] A second sign is a yellowish tint on the eroded tooth.
BEIJING (Reuters) -No one can stop China's "reunification" with Taiwan, Chinese President Xi Jinping said in his New Year's speech on Tuesday, laying down a clear warning to what Beijing regards ...