Microstructure of the Human Tooth

Losee, F.L.; Jennings, W.H.; Lawson, Michael E.; Forziati, A.F.

doi:10.1177/00220345570360061601

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…4-9), the Mg content of the crystals may be supplied from body fluid [Jenkins, 1978;Dricssens, 1982] through some denti nal tubules which open into the basis of the tuft and la mella crevices [Losee et al, 1957;Kodaka, 1978]. Accord ing to Newesely [1965], Kilian and Ennevcr [1975], BoyanSalyers et al [1978], Knuuttila et al.…”

Section: Discussionmentioning

confidence: 99%

Hexahedrally Based Crystals in Human Tooth Enamel

Kodaka¹,

Debari

Abe³

1992

Caries Res

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Mg-containing calcium phosphate crystals including pseudocuboidal, rhombo-hedral shapes and groupings of quadrangular blades cubically arranged were found in human tooth enamel by scanning electron microscopy and by electron probe microanalysis. In caries-free old enamel, these hexahedrally based crystals measuring 0.5–2.5 μm in length were observed in some crevices of tufts and lamellae. The crystals were rarely seen in the inner crevices of caries-free exfoliated deciduous enamel and none could be seen in sound young enamel. In brown-coloured old enamel possessing arrested caries with lamellae, some of the lamellae contained crystals measuring 0.1–1.5 μ in length adjacent to half-dissolved prisms. These crystals, identified as Mg-containing whitlockite, will grow during a long period after eruption of the tooth or during the enamel caries process.

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Section: Discussionmentioning

confidence: 99%

Hexahedrally Based Crystals in Human Tooth Enamel

Kodaka¹,

Debari

Abe³

1992

Caries Res

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“…Some investigators accounted for the enamel tufts as structures running between the sheaths (BEUST, 1932;SOGN -NAES, 1949;LOSEE et al, 1957;OSBORN, 1969), whereas others considered them to consist of hypocalcified prisms (FUJITA and YUASA, 1942;SHIOTA et al, 1963;HINRICHSEN and ENGEL, 1966). OSBORN (1969) reported in his three-dimensional serial optical section study that enamel tufts consisted of unconnected leaves approximately l um thick and often cutting through prism sheaths.…”

mentioning

confidence: 99%

“…The fibrils of tufts have been described as thread-like elements involved in the formation of the tuft which appear as flat structures invariably lying between rods (BEUST, 1932). Additionally, tufts were reported as consisting of groupings of interrod materials or rod sheaths (LOSEE et al, 1957). However, FUJITA and YUASA (1942) demonstrated a three-dimensional reconstruction of enamel tufts by the Sump method (Suzuki's universal microprinting, using celluloid to prepare impressions of the sample surface).…”

mentioning

confidence: 99%

Ultrastructural and Immunocytochemical Studies of Enamel Tufts in Human Permanent Teeth.

Amizuka

Uchida

Fukae

et al. 1992

Arch. Histol. Cytol.

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Summary. Enamel tufts were exposed after decalcification of the enamel matrix and their fine structures and immunocytochemical characteristics were examined. Under the binocular microscope and the scanning electron microscope (SEM), enamel tufts appeared as corrugated ribbon-like structures located on the dentine parallel to the tooth axis. SEM observation disclosed enamel tufts as bundles of well extended tubular structures with cross striations attributable to hypocalcified enamel sheaths. Plate-like structures were observed at the center of enamel tufts, where they ran parallel to the enamel tufts. Under the transmission electron microscope (TEM), the plates of tufts revealed their origin in the superficial layer of the dentine, penetrating the hypercalcified zone adjacent to the dentineenamel (D-E) junction, and then reaching the tuft region. The plates of tufts ran mainly along the enamel sheaths and partially across the prisms in the tuft region. The protein-A-gold technique revealed an intense immunoreactivity for amelogenin over the superficial layer of the dentine, but over the enamel prisms in the tufts nor over the plates of tufts. The immunoreactivity for 13-17kd protein was detected over the filamentous structures closely associated with the enamel sheaths in the enamel tuft. Thus our study disclosed that enamel tufts consist of both well extended hypocalcified enamel prisms and plates of tufts. The major organic component of the enamel tufts is suggested to be 13-17kd protein rather than amelogenin.

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“…Since such an investigation involves the analysis of areas that are not dimensionally amenable to chemical techniques, a battery of optical techniques are utilized. This approach has been shown to be extremely effective by Darling [24], Gustafson .[25] * and Losee [26] and their collaborators in that the information obtained from a single technique may be extended by correlation with one or more other techniques applied to the same specimen.…”

Section: )mentioning

confidence: 99%

Microstructure of the human tooth:

Jennings¹,

Losee²

1958

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This report concerns the primary or pre-clinical enamel lesion which may be regarded as the earliest structural alteration of the enamel by the caries process. This lesion exhibits altered birefringence, enhanced fluorescence, and no loss of mineral. Based on clinical and laboratory observations, the following mechanism of the formation of this primary lesion is presented: Some organic agent initiating from the accumulation of oral material on the enamel surface diffuses into the enamel and produces the structural alteration described above. The advanced lesion is similar to the primary lesion, but may exhibit several geometrical forms which result from the influence of structural features on the microscopic progress of the lesion. The hypercalcif ied outer layer of human enamel caries is demonstrated by optical techniques and by two simple experiments. 1 .

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Microstructure of the Human Tooth

Cited by 14 publications

References 8 publications

Hexahedrally Based Crystals in Human Tooth Enamel

Hexahedrally Based Crystals in Human Tooth Enamel

Ultrastructural and Immunocytochemical Studies of Enamel Tufts in Human Permanent Teeth.

Microstructure of the human tooth:

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