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When enough acid is produced so that the pH goes below 5.5, the acid dissolves carbonated hydroxyapatite, the main component of tooth enamel. [7] The plaque can hold the acids in contact with the tooth for up to two hours, before it is neutralized by saliva.
Consequently, enamel, unlike many other tissues of the body, has no way to regenerate itself. [17] After destruction of enamel from decay or injury, neither the body nor a dentist can restore the enamel tissue. Enamel can be affected further by non-pathologic processes. Enamel is covered by various structures in relation to the development of ...
Liu says her advice is the same as it's been: “If you can, reduce your use of plastic. Not just black plastic, but plastic in general, [which] can reduce your exposure to any harmful chemical ...
The diameter of the dentinal tubules is largest near the pulp (about 2.5 μm) and smallest (about 900 nm) at the junction of dentin and enamel. [82] The carious process continues through the dentinal tubules, which are responsible for the triangular patterns resulting from the progression of caries deep into the tooth.
D'yan Forest is a working comedian at 90, doing gigs in two languages. She shared some of her tips for staying fit and funny into her 90s. These include having a positive outlook and spending time ...
The diameter of these tubules range from 2.5 μm near the pulp, to 1.2 μm in the midportion, and 900 nm near the dentino-enamel junction. [18] Although they may have tiny side-branches, the tubules do not intersect with each other. Their length is dictated by the radius of the tooth.
Wendy Williams' health has taken a turn for the worse amid her battle with dementia and aphasia. The former "Wendy Williams Show" host, 60, has become "cognitively impaired and permanently ...
Gothic châsse; 1185–1200; champlevé enamel over copper gilded; height: 17.7 cm (7.0 in), width: 17.4 cm (6.9 in), depth: 10.1 cm (4.0 in). Vitreous enamel, also called porcelain enamel, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C (1,380 and 1,560 °F).