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  2. Tooth enamel - Wikipedia

    en.wikipedia.org/wiki/Tooth_enamel

    The enamel on primary teeth has a more opaque crystalline form and thus appears whiter than on permanent teeth. The large amount of mineral in enamel accounts not only for its strength but also for its brittleness. [6] Tooth enamel ranks 5 on Mohs hardness scale (between steel and titanium) and has a Young's modulus of 83 GPa. [4]

  3. Enamel infraction - Wikipedia

    en.wikipedia.org/wiki/Enamel_infraction

    As of 2024, the prevalence of pathology reaches over 90%. In patients aged 20 years, an average of 4 intact teeth with enamel cracks are identified. Before 30 years of age, this rate increases 3 times and after 45-50 years of age it is 100%. In 60% of cases there are single fissures, multiple fissures are found in 40% of examined patients.

  4. Cementoenamel junction - Wikipedia

    en.wikipedia.org/wiki/Cementoenamel_junction

    In about 60–65% of teeth, the cementum overlaps the enamel at the CEJ, while in about 30% of teeth, the cementum and enamel abut each other with no overlap. In only 5–10% of teeth, there is a space between the enamel and the cementum at which the underlying dentin is exposed. [3]

  5. Over time, enamel breaking down can contribute to cavities and dental decay, according to oral surgeon Jason Auerbach, DDS. “The acidity that sits on one's teeth and the bacteria that comes from ...

  6. Human tooth development - Wikipedia

    en.wikipedia.org/wiki/Human_tooth_development

    Teeth affected by regional odontodysplasia nevAmelogenesis imperfecta is an autosomal dominant disease characterized by a defect in dental enamel formation. Teeth are often free of enamel, small, misshapen, and tinted brown. The cause of these deformities is due to a mutation in enamel in expression.

  7. Dental fluorosis - Wikipedia

    en.wikipedia.org/wiki/Dental_fluorosis

    The white opaque areas in the enamel of the teeth are more extensive but do involve as much as 50% of the tooth. Moderate: 4: All enamel surfaces of the teeth are affected and surfaces subject to attrition show wear. Brown stain is frequently a disfiguring feature Severe: 5: All enamel surfaces are affected and hypoplasia is so marked that the ...

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