Clinical and histologic appearance in enamel of primary teeth in relation to neonatal blood ionized calcium values

Ranggård, Lotta; Norén, Jörgen G.; Nelson, Nina

doi:10.1111/j.1600-0722.1994.tb01465.x

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…Histologically, the enamel morphology was typical for primary teeth (9,11). Incisally, a less mineralized area within the prenatal enamel, mainly buccally, of full-term infants is common.…”

Section: Discussionmentioning

confidence: 96%

Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion

Ranggård¹,

Östlund²,

Nelson³

et al. 1995

Acta Odontologica Scandinavica

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Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion, Acta Odontologica Scandinavica, 53:2, 123-128 To link to this article: http://dx.Ranggird L, Ostlund J, Nelson N, Nortn JG. Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion. Acta Odontol Scand 1995;30:122-128. Oslo. ISSN 0001-6357. ACTA ODONTOL SCANT) 53 (1995) -1 1 -ET days Hypocal. a 2 3 3 days X X X X X X X X Gat. age S 36 weeks

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“…Histologically, the enamel morphology was typical for primary teeth (9,11). Incisally, a less mineralized area within the prenatal enamel, mainly buccally, of full-term infants is common.…”

Section: Discussionmentioning

confidence: 96%

Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion

Ranggård¹,

Östlund²,

Nelson³

et al. 1995

Acta Odontologica Scandinavica

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“…Microscopic examination of the 70 µm to 80 µm thick sections was performed using polarized light to allow discrimination of prenatal and postnatal enamel separated by the so-called neonatal line [14].…”

Section: Introductionmentioning

confidence: 99%

Enamel hypoplasia of primary teeth in chronic renal failure

Koch¹,

Bührer²,

Pioch³

et al. 1999

Pediatric Nephrology

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Chronic renal failure (CRF) in the first years of life is associated with developmental defects of enamel in the permanent dentition. We investigated if CRF also affects the primary (deciduous) dentition. Thirty-one children with CRF on conservative treatment (n = 12) or on renal replacement therapy (n = 19) underwent dental inspection. In addition, 18 CRF children provided an exfoliated deciduous tooth for microscopic examination. Enamel defects were detected in a total of 12 children (31%), either clinically or microscopically. Of the 7 children affected clinically, 6 (19% of all examined) presented localized hypoplasia of the primary canines, which was found only in 3% of healthy control children: 1 patient had generalized pitted enamel hypoplasia. By microscopy, 5 of 10 primary canines examined showed enamel hypoplasia localized exclusively in enamel formed after birth. The "birth line," a visible structure within the primary enamel, was always present, which excludes a prenatal onset of the defects. Of the 12 patients with an enamel defect, 9 had a documented onset of CRF within the first 7 weeks of life. We conclude that renal disease leading to CRF may affect enamel formation of primary teeth in early postnatal life, resulting in lesions different from those observed in the secondary dentition.

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“…by Wilson andShroff 1970) were probably the first to hypothesise that also some systemic influences could affect its appearance, even if the first studies did not evidence a clear relationship between NL width and accentuated enamel lines related to systemic perinatal disturbances (Godt 1963;Wilson and Shroff 1970). Later on, the role played by some physiological parameters, notably by the decrease in plasma calcium occurring during the first 48 to 72 hours after birth (hypocalcaemia), has been taken into account (Norén 1983(Norén , 1984Ranggard et al 1994;Seow 1986). In facts, infants born from diabetic mothers prone to hypocalcaemia show thicker and less mineralized NLs compared to those from healthy mothers (Norén 1984).…”

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confidence: 99%

Gestation Length, Mode of Delivery, and Neonatal Line-Thickness Variation

Zanolli

Bondioli

Manni³

et al. 2011

Human Biology

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ABTRACTThe transition from an intra-to extra-uterine environment leaves its mark in deciduous teeth (and first permanent molars) as an accentuated enamel incremental ring called the neonatal line (NL). This prominent microfeature separates the enamel formed during intrauterine life from that formed after leaving the womb. However, while the physical structure of this scar is well known, the bases of its formation are still a matter of investigation. In particular, besides the influence of the birth-related abrupt environmental and dietary changes and the role played by physiological factors such as hypocalcaemia, it has been suggested a direct relationship between NL thickness variation and the physical trauma implied by the birth dynamics, the Caesarean and the operative modes being apparently associated to the thinnest and the thickest lines, respectively. By using the histological record from a deciduous dental sample (exfoliated crowns) of 100 modern healthy school-aged children (47 males and 53 females) of reported birth histories (normal delivery mode: 55 cases; Caesarean: 40; operative: 5), we investigated the relationships between birth dynamics and NL thickness variation. The Tukey Honest Significant Difference method has been used to test the differences between the means of the grouping levels. The results of our histo-morphological investigation do not support the suggestion that Caesarean-born children display, on average, a thinner enamel scar compared to children associated to a normal delivery mode. Rather, our study points to the influence exerted by factors intimately related to gestational length variation on the degree of expression of the line. KEY WORDS: HUMAN BIRTH, DELIVERY MODE, GESTATION LENGTH, DECIDUOUS TEETH, DENTAL ENAMEL STRUCTURE, INCREMENTAL MARKERS, NEONATAL LINE.Pre-print version. Visit http://digitalcommons.wayne.edu/humbiol/ after 1 December 2011 to acquire final version. 2The birth process leaves its mark on dental enamel in the form of a ring, an accentuated incremental line called the "Neonatal Line" (NL) (Rushton 1933;Schour 1936). This prominent microfeature, occasionally visible also in the dentine (Schour 1936;Skinner 1992), separates the enamel formed during intrauterine life from that formed after leaving the womb.In modern humans, the NL is usually present in all crowns forming at birth, that is, all the elements of the primary dentition and the first permanent molars (mesiobuccal cusp) (Christensen and Kraus 1965, Deutsch andPe'er 1982;Deutsch et al. 1985;Kraus 1959;Levine et al. 1979). Occasionally, a macroscopic hypoplasia can be detected in correspondence with the NL, but it is usually worn away (Massler et al. 1941;Moss-Salentijn and Hendricks-Klyvert 1985;Schroeder 1991;Skinner 1992).At birth, the enamel is only partially mineralized and continues to increase in thickness by apposition of additional centripetal layers secreted by the ameloblasts at the level of the enamel-dentine junction (EDJ) to a circadian rhythm of 4-5 µm in extant humans (Antoine et al. 2...

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Clinical and histologic appearance in enamel of primary teeth in relation to neonatal blood ionized calcium values

Cited by 14 publications

References 17 publications

Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion

Clinical and histologic appearance in enamel of primary teeth from children with neonatal hypocalcemia induced by blood exchange transfusion

Enamel hypoplasia of primary teeth in chronic renal failure

Gestation Length, Mode of Delivery, and Neonatal Line-Thickness Variation

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