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Many variables have been identified that influence the formation of dental calculus, including age, sex, ethnic background, diet, location in the oral cavity, oral hygiene, bacterial plaque composition, host genetics, access to professional dental care, physical disabilities, systemic diseases, tobacco use, and drugs and medications. [18]
Cross-sectional diagram of a molar tooth. 1: crown, 2: root, 3: enamel, 4: dentin and dentin tubules, 5: pulp chamber, 6: blood vessels and nerve within root canal, 7: periodontal ligament, 8: apex and periapical region, 9: alveolar bone VITA classical A1-D4 shade guide arranged according to value VITA classical A1-D4 shade guide arranged according to chroma; A: red-brown, B: red-yellow, C ...
Dental fluorosis is a common [2] disorder, characterized by hypocalcification of tooth enamel caused by ingestion of excessive fluoride during enamel formation. [3] [needs update] Dental fluorosis appears as a range of visual changes in enamel [4] causing degrees of intrinsic tooth discoloration, and, in some
Before the cavity forms, the process is reversible, but once a cavity forms, the lost tooth structure cannot be regenerated. A lesion that appears dark brown and shiny suggests dental caries were once present, but the demineralization process has stopped, leaving a stain. Active decay is lighter in color and dull in appearance. [14]
Since 1920, various derivatives of "chalky teeth" have appeared in the academic literature to describe specific dental anomalies. Most references are to enamel defects that have a chalky appearance (white, cream or brown) and are of developmental origin (i.e. amelogenesis imperfecta, enamel hypomineralisation, dental fluorosis, molar hypomineralisation).
The cavity-prevention effect of fluoride is partly due to these surface effects, which occur during and after tooth eruption. [17] Fluoride interferes with the process of tooth decay as fluoride intake during the period of enamel development for up to 7 years of age; the fluoride alters the structure of the developing enamel making it more ...
A 1930s poster from the Work Projects Administration promoting oral hygiene. Tooth decay is the most common global disease. [14] Over 80% of cavities occur inside fissures in teeth where brushing cannot reach food left trapped after eating and saliva and fluoride have no access to neutralize acid and remineralize demineralized teeth, unlike easy-to-clean parts of the tooth, where fewer ...
The agents most commonly used to intrinsically change the color of teeth are hydrogen peroxide and carbamide peroxide. Oxygen radicals from the peroxide in the whitening agents contact the stains in the interprismatic spaces within the enamel layer. When this occurs, stains will be bleached and the teeth now appear lighter in color.
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