What is neonatal line in dentistry?

The neonatal line is a histologic landmark in primary tooth enamel corresponding to the event of birth. The average width of the neonatal line (NNL) in primary tooth enamel of 147 children was measured. In children with normal birth histories the width of the NNL was found to be 12.9 ± 4.8 \Lm.

What does the neonatal line indicate?

The presence of neonatal line indicates live birth and it is possible to estimate the exact period of survival of the infant in days by measuring the amount of postnatal hard tissue formation, and thus can be an evidence to the brutal act of infanticide.

What is the name of the growth from the oral epithelium that gives rise to the tooth buds?

The dental papilla gives rise to the dentin and pulp of a tooth. The enamel organ, dental papilla, and dental follicle together forms one unit, called the tooth germ.

What causes Perikymata?

The appositional secretion process of the enamel during its histogenesis creates a series of striations on the surface of the dental crown in the form of grooves known as Perikymata (Simmer & Hu, 2001).

Is neonatal line a Hypocalcified structure?

The neonatal line formed by the double bending of the prisms is likely to represent a particular type of rhythmic Retzius line rather than a pathologic Retzius line, whereas the hypocalcified sheath regions may be similar to those of some pathologic lines of Retzius.

Which teeth have Imbrication lines?

imbrication n. Anterior teeth in the same arch which overlap each other. Imbrication lines are mesio-distal ridges on the cervical third of the labial surface of an anterior tooth associated with enamel incremental growth formation. …

Are Neonatal lines present in permanent teeth?

The occurrence of neonatal lines (NL) in all cusps of the first permanent molar (M 1) has been investigated in complete series of M 1 from 16 males and 11 females. Previous investigations of newborn children gave reason to expect a lower frequency of occurrence in males.

What does the dental lamina gives rise to?

The dental lamina continues to grow backwards, giving rise to further enamel organs for the second deciduous molar (10-week embryo), and the permanent molars (first permanent molar at 16-week embryo; second and third permanent molars after birth).

What are odontoblasts cells?

Odontoblasts are tall columnar cells located at the periphery of the dental pulp. They derive from ectomesenchymal cells originated by migration of neural crest cells during the early craniofacial development.

Are Perikymata and imbrication lines the same?

Brownish lines, the striae of Retzius, develop as a result of a change in the growth process. Macroscopically, these lines can be seen on the labial surface or lip side of anterior or front teeth as horizontal lines on the tooth crown, also known as perikymata or “imbrication lines” .