The dentin-enamel junction (DEJ), also called the dentinoenamel junction, is the specialized interface or boundary layer between the tooth's enamel (the hard, outer covering) and dentin (the softer, bulk tissue beneath it). It is not a simple flat line but a complex, multilevel biomechanical interface with a characteristic scalloped (wavy or interlocking) structure. The scallops (typically 25–100 μm in size) have convexities directed toward the dentin and concavities toward the enamel, creating
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The dentin-enamel junction (DEJ), also called the dentinoenamel jun…
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🦷 Dental Fluorosis: When Too Much Fluoride Affects Enamel Development Dental fluorosis occurs when excess fluoride exposure interferes with enamel formation during early childhood—before the age of six. 💧 Main risk factors include: Long-term consumption of drinking water containing more than 1.5 mg/L of fluoride Swallowing large amounts of fluoride-containing dental products at a young age 🧬 Severity matters The extent of dental fluorosis depends directly on the fluoride concentration and the
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🦷 Ever wondered what happens to extracted teeth after a dental visit? At many dental schools, jars like this one are used as invaluable teaching tools. Real human teeth are collected, cleaned, and studied by students learning how to identify cavities, enamel wear, root structure, and the effects of diseases like caries and periodontitis. Each tooth tells a story, of diet, hygiene, and even medical history, offering students a hands-on understanding that no plastic replica can match. Take a clos
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