Enzyme Histochemistry of the Prenatal Development of Human Deciduous Teeth

Me, Matthiessen

doi:10.1159/000142811

Cited by 19 publications

(2 citation statements)

References 9 publications

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“…bone as well as in other hard tissues. Most of Implantation of freeze-dded allogenic dentin these investigations have been done on rats and in abdominal muscles in guinea pigs has been mice although a few used monkey and man shown to give a high yield of osteoid and bone,, as (9,13). Fluoride resistant acid phosphatase is well as chondroid and cartilage, due to an found in osteoclasts while a fluoride sensitive acid inductive mechanism (2,3,14).…”

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confidence: 99%

Enzyme histochemical studies of acid phosphatase isoenzymes in induced heterotopic bone formation in guinea pigs

Nilsen

Magnusson

1981

European J Oral Sciences

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– A bone induction model was unsed to study the effect of different pretreatments and inhibitors added to the substrate media used for the histochemical demonstration of acid phosphatase activity. Two different acid phosphatases (AcP) were demonstrated. Tje AcP of matrix‐phosphatate activity. Two differet acid phosphatases (AcP) Were demonstrated. The AcP of matrix‐producing cells exhibited resistance to pretreatment with EDTA while it was sensitive to tartrate added to the incubation medium. The AcP in dentin resorbing cells was EDTA sensitive but resistant to tartrate. The AcP activities in both resorbing and matrix‐producing cells were generally sensitive to fluoride, copper and molybdate. In some of the dentinoclasts, Fluoride resistant AcP wsa observed. The results support previous investigations on normal bone formation, suggesting that at least two different isoenzymes of AcP exist. Once of these seemed to be related to matrix production and mineralization of the new heteotopic bone.

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confidence: 99%

Enzyme histochemical studies of acid phosphatase isoenzymes in induced heterotopic bone formation in guinea pigs

Nilsen

Magnusson

1981

European J Oral Sciences

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“…Such a hypothesis is supported by the observation of Mori and coworkers (1964), who found a very strong alkaline phosphatase activity associated with the neoplastic ameloblast-like cells in the matrix and hard tissue forming adenomatoid odontogenic tumor. Studies by Matthiessen (1966Matthiessen ( , 1967 suggest that pre-ameloblasts are alkaline phosphatase-negative. The cells do not show positive alkaline phosphatase activity until they mature into actively secreting ameloblasts.…”

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confidence: 99%

An electron‐microscopic and cytochemical study of follicular ameloblastoma

Cutler

Innes

1983

J Oral Pathology Medicine

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The ultrastructural and enzyme cytochemical features of two follicular ameloblastomas were investigated. The peripherial cells of the follicular areas in both lesions had several types of tall columnar cells which were highly polarized and showed varying degrees of cellular differentiation. These polarized cells had their nuclei situated away from the basal lamina, and often contained dilated strands of endoplasmic reticulum in the subnuclear cytoplasm. Some of these cells also contained dense-cored secretory granules, condensing granules and coated vesicles in the cytoplasm adjacent to the basal plasma membrane. These cells bore a striking resemblance to pre-ameloblasts and early secretory ameloblasts. Alkaline phosphatase and ATPase cytochemistry supported these morphologic observations. Interestingly, the central cells of the follicular areas were consistently negative for alkaline phosphatase activity as were the peripheral cells, while both cell types had ATPase activity demonstrable at their cell surface.

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Skeletal maturation of the human fetus assessed radiographically on the basis of ossification sequences in the hand and foot

Kjar¹

1974

American J Phys Anthropol

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In studies of postnatal human development the skeletal maturation of the hand has been found to be a better indicator of general physical maturation than attained body height. For assessment of prenatal human development the Crown‐rump length (CRL) has so far been the most commonly used measure. The object of the present study is to examine the possibility of also using the skeletal maturation of the hand as a maturity indicator in fetal development. The study is based upon a radiographic and histochemical investigation of 169 human fetuses. On the basis of counting silver‐impregnated diaphyses on radiographs of the hand and foot a maturity indicator (CNO = Composite Number of Ossified bones in hand and foot) was established. Owing to the marked regularity of the recorded ossification pattern, the CNO parameter can be used for evaluating fetal maturation during the early half of the prenatal period. To supplement the assessment of skeletal maturation during the later stages of development, a classification based on the shape of some bones was included in the study. In many cases fetuses of the same size (CRL) exhibited different stages of skeletal maturation (CNO). In accordance with findings from assessment of postnatal development, a more accurate evaluation of fetal development is obtained by combining the size parameter CRL with an assessment of fetal skeletal maturation, CNO.

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Enzyme Histochemistry of the Prenatal Development of Human Deciduous Teeth

Cited by 19 publications

References 9 publications

Enzyme histochemical studies of acid phosphatase isoenzymes in induced heterotopic bone formation in guinea pigs

Enzyme histochemical studies of acid phosphatase isoenzymes in induced heterotopic bone formation in guinea pigs

An electron‐microscopic and cytochemical study of follicular ameloblastoma

Skeletal maturation of the human fetus assessed radiographically on the basis of ossification sequences in the hand and foot

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