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By volume, 45% of dentin consists of the mineral hydroxyapatite, 33% is organic material, and 22% is water. [1] Yellow in appearance, it greatly affects the color of a tooth due to the translucency of enamel. Dentin, which is less mineralized and less brittle than enamel, is necessary for the support of enamel. [2]
The underlying dentin layer is darker than enamel, yellow-brown in color, and less transparent. [6] Dentin forms the bulk of the tooth substance, [7] and contributes most to the overall tooth color. [6] At the core of the tooth is soft connective tissue termed the dental pulp. [8]
The normal color of enamel varies from light yellow to grayish white. At the edges of teeth where there is no dentin underlying the enamel, the color sometimes has a slightly blue tone. Since enamel is semitranslucent, the color of dentin and any restorative dental material underneath the enamel strongly affects the appearance of a tooth.
The normal color of enamel varies from light yellow to grayish (bluish) white. It has been suggested that the color is determined by differences in the translucency of enamel, yellowish teeth having a thin, translucent enamel through which the yellow color of the dentin is visible and grayish teeth having a more opaque enamel.
Primary teeth have a more obvious appearance as they have a thinner layer of enamel overlying dentine, hence the abnormal color of dentine is more noticeable. [2] Radiographically, affected teeth have short and narrow roots, and obliterated pulps due to dentine hypertrophy before or shortly after tooth eruption. [2]
The progression of pit and fissure caries resembles two triangles with their bases meeting along the junction of enamel and dentin. Teeth are bathed in saliva and have a coating of bacteria on them that continually forms. The development of biofilm begins with pellicle formation. Pellicle is an acellular proteinaceous film which covers the teeth.
The normal color of enamel varies from light yellow to grayish (bluish) white. At the edges of teeth where there is no dentin underlying the enamel, the color sometimes has a slightly blue tone. Since enamel is semitranslucent, the color of dentin and any material underneath the enamel strongly affects the appearance of a tooth. The enamel on ...
The free radicals diffuse through the enamel and dentin and break down the color molecules, resulting in the perception of a whiter tooth color. [70] The downside is that these radicals have certain local harmful effects, such as enamel erosion, changes in the microhardness of the teeth, gum irritation, post-bleaching hypersensitivity, and ...