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Enamel microabrasion is a procedure in cosmetic ... darker due to exposure of dentin surface and thinning of enamel layer over it. ... correction of this yellow color ...
[34] [35] The conventional workflow sequence for a diastema closure is 1)Shade selection was done for dentin shade and enamel shade. Composite button samples of different shades are placed on teeth and a dental photography taken to verify 2)Rubber dam isolation 3)Placing a retraction cord. 3)Etching enamel surface, 4)Application of bonding ...
Tooth wear and aging: Tooth wear is a progressive loss of enamel and dentine due to tooth erosion, abrasion and attrition. As enamel wears down, dentine becomes more apparent and chromogenic agents are penetrated in the tooth more easily. The natural production of secondary dentine also gradually darkens teeth with age. [22]
Molar incisor hypomineralisation (MIH) is a type of enamel defect affecting, as the name suggests, the first molars and incisors in the permanent dentition. [1] MIH is considered a worldwide problem with a global prevalence of 12.9% and is usually identified in children under 10 years old. [2]
Secondary dentin is darker and more opaque than primary dentin. This gives the dentin an overall darker appearance. [11] At the same time, the enamel layer is gradually thinned by tooth wear processes such as attrition and acid erosion, a degree of which is considered normal. [11] Enamel also becomes less porous and phosphate-deficient.
Looking into the preparation, the white, outer enamel appears intact, while the yellow, underlying dentin appears recessed. This is because the dentin was decayed and was thus removed. This portion of the enamel is now unsupported, and should be removed to prevent future fracture. Restoring a tooth to good form and function requires two steps:
Whitening, or "tooth bleaching", is the most common cosmetic dental procedure.Whitening is a safe process that is effective for most patients. Multiple whitening options are available, including over the counter products such as Crest Whitestrips, as well as dentist-supervised methods such as in-office treatments or at-home treatments involving trays with a peroxide gel.
If the attrition is severe, the enamel can be completely worn away leaving underlying dentin exposed, resulting in an increased risk of dental caries and dentin hypersensitivity. It is best to identify pathological attrition at an early stage to prevent unnecessary loss of tooth structure as enamel does not regenerate.
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