enamel hypocalcification,
enamel
a defect in which the enamel of the teeth is soft and undercalcified and opaque in appearance but normal in quantity. It is caused by defective maturation of ameloblasts. The teeth are chalky in consistency, their surfaces wear down rapidly and are more susceptible to caries, and a yellowish-brown stain appears on the teeth as the underlying dentin is exposed. The condition affects both primary and secondary teeth. Compare enamel hypoplasia. See also amelogenesis imperfecta.
enamel
(inam´
l),
n 1. the hard, glistening tissue covering the anatomic crown of the tooth. It is composed mainly of hexagonal rods of hydroxyapatite, sheathed in an organic matrix (approximately 0.15%) and oriented with their long axes approximately at right angles to the surface.
n 2. the outermost layer or covering of the coronal portion of the tooth that overlies and protects the dentin.
l), n 1. the hard, glistening tissue covering the anatomic crown of the tooth. It is composed mainly of hexagonal rods of hydroxyapatite, sheathed in an organic matrix (approximately 0.15%) and oriented with their long axes approximately at right angles to the surface.
n 2. the outermost layer or covering of the coronal portion of the tooth that overlies and protects the dentin.
enamel bonding,
v See bonding, enamel.
enamel hypocalcification
n a hereditary condition in which the enamel of the tooth has formed without adequate amounts of mineralization, leaving the surface of the tooth brittle and often stained.
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