neonatal line

neonatal line
a line seen on longitudinal sections of a tooth, showing a demarcation between the structures present at birth and those deposited postnatally; in cross sections, the lines are seen as rings (neonatal rings), and their variations indicate adaptational changes in tooth formation. See also l's of Owen.

Medical dictionary. 2011.

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  • Neonatal line — The neonatal line is a particular band of incremental growth lines seen in histologic sections of a deciduous tooth. It belongs to a series of a growth lines in tooth enamel known as the Striae of Retzius. The neonatal line is darker and larger… …   Wikipedia

  • neonatal ring — see neonatal line, under line …   Medical dictionary

  • Neonatal perception — is the study of the extent of somatosensory and other perceptual systems during pregnancy. In practical terms, this means the study of fetuses; none of the accepted indicators of perception are present in embryos. Contents 1 Medical studies and… …   Wikipedia

  • line — 1. A mark, strip, or streak. In anatomy, a long, narrow mark, strip, or streak distinguished from the adjacent tissues by color, texture, or elevation. SEE ALSO: linea. 2. A unit of …   Medical dictionary

  • Umbilical line — An umbilical line is a catheter that is inserted into one of the two arteries or the vein of the umbilical cord. Generally the UAC/UVC (Umbilical Artery Catheter/Umbilical Vein Catheter) is used in Neonatal Intensive Care Units (NICU) as it… …   Wikipedia

  • Tooth enamel — Labeled molar Latin enamelum Code TA …   Wikipedia

  • ring — 1. A circular band surrounding a wide central opening; a r. shaped or circular structure surrounding an opening or level area. SYN: anulus [TA]. 2. The closed ( i.e., endless) chain of atoms in a cyclic compound; commonly used for “cyclic” or… …   Medical dictionary

  • Striae of Retzius — The Striae of Retzius are incremental growth lines seen in enamel and are results of enamel s development. When viewed microscopically in cross section, they appear as concentric rings. In a longitudinal section, they appear as a series of dark… …   Wikipedia

  • Colin Morley — Prof Colin Morley updating his laboratory notebook 1980s Colin Morley, FRCP, FRCPCH, FRACP, is a British/Australian academic Neonatologist. He was the Professor Director of Neonatal Medicine at The Royal Women’s Hospital and The Royal Children’s… …   Wikipedia

  • Medical analysis of circumcision — Numerous medical studies have examined the effects of male circumcision with mixed opinions regarding the benefits and risks of the procedure. Opponents of circumcision say it is medically unnecessary, is unethical when performed on newborns, is… …   Wikipedia

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