Morphology of the human dental enamel

Ippolitov, Yu. A.; Ippolitov, Ivan; Seredin, P. V.

doi:10.1016/j.ijd.2014.03.004

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…It is known that the tooth interprismatic spaces are filled with biopolymers represented, besides neutral glycoproteins [ 13 ], by cationic proteins with low molecular weight and a characteristic spectrum of amino acids (lysine, arginine, histidine), as well as by hyaluronic acid. At the initial stages of the caries process in the areas, adjacent to the site of demineralization, biopolymers and hyaluronic acid should be lost that will cause reorganization of the inorganic matrix in the hard tissues of the teeth.…”

Section: Resultsmentioning

confidence: 99%

Phase Transformations in a Human Tooth Tissue at the Initial Stage of Caries

et al. 2015

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The aim of the paper is to study phase transformations in solid tissues of the human teeth during the development of fissure caries by Raman and fluorescence microspectroscopy. The study of the areas with fissure caries confirmed the assumption of the formation of a weak interaction between phosphate apatite enamel and organic acids (products of microorganisms). The experimental results obtained with by Raman microspectroscopy showed the formation of dicalcium phosphate dihydrate - CaHPO4-2H2O in the area of mural demineralization of carious fissure. A comparative analysis of structural and spectroscopic data for the intact and carious enamel shows that emergence of a more soluble phase - carbonate-substituted hydroxyapatite - is typical for the initial stage of caries. It is shown that microareas of dental hard tissues in the carious fissure due to an emerging misorientation of apatite crystals have a higher fluorescence yield than the area of the intact enamel. These areas can be easily detected even prior to a deep demineralization (white spot stage) for the case of irreversibly changed organomineral complex and intensive removal of the mineral component.

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Section: Resultsmentioning

confidence: 99%

Phase Transformations in a Human Tooth Tissue at the Initial Stage of Caries

et al. 2015

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“…Normal or lower carbon concentration contributes to enamel hardness. One more conclusion is that mesiodens is not susceptible to accelerated decay although there are no comprehensive data on the incidence of the mesiodens caries [24][25][26] . In relation to the Mg differences found, magnesium is "trace" element that is absorbed, but not incorporated into the hydroxyapatite structure.…”

Section: Discussionmentioning

confidence: 99%

The mineral content of the hard dental tissue of mesiodens

Tanaskovic-Stankovic¹,

Tanasković²,

Jovičić³

et al. 2018

BIOMED PAP

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and Conclusion. The results showed that there was a difference in the weight percentage of selected inorganic elements (calcium, phosphorus, oxygen, carbon, magnesium and sodium) in all three types of dental hard tissues but the differences were mostly expressed in the cementum tissue. The statistical analysis showed that the differences were marginally significant especially for calcium and phosphorus values and ratio in the enamel and dentine. The carbon and magnesium content in all three hard tissues showed the most differences, but overall, the hard tissues mineral content of the mesiodens did not differs significantly from healthy teeth.

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“…Эмаль образует изолирующий барьер, который при благоприятных условиях защищает зуб от физических, химических и тепловых воздействий, в некоторых случаях неполноценность ее структуры может утяжелять течение стоматологических болезней [ 6,7 ] . По мнению В.К.…”

Section: Introductionunclassified

Evaluation of the influence of connective tissue dysplasia on morphologic and biochemical rearrangements in the organic and mineral matrix of lower third molars at different stages of eruption

Коршунов,

Вагнер,

Бельская

et al. 2023

Clinical Dentistry (Russia)

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Цель работы — оценить зрелость твердых тканей нижних третьих моляров, находящихся на различных стадиях прорезывания, при дисплазии соединительной ткани (ДСТ), опираясь на результаты микроскопических и биохимических методов. В исследовании приняли участие 84 женщины в возрастных группах 14—17, 18—21, 22—26, 27—31, 32—36 лет с ДСТ и без нее, у которых по ортодонтическим или неотложным показаниям удаляли зубы 3.8, 4.8, находящиеся на разных стадиях прорезывания. После подготовки по собственным методикам образцов дентина, эмали и эмалево-дентинного соединения проводили микроскопическое исследование с помощью растрового электронного микроскопа Jeol JCM-5700, оценивали морфологию твердых тканей зуба на продольном срезе, а также выполняли биохимическое исследование методом ИК-спектроскопии, определяли на всех этапах положение и интенсивность полос поглощения (ПП). Между возрастными группами при ДСТ выявлены статистически значимые отличия в поверхностном отделе: в возрастной группе 22—26 лет на стадиях зачатка (p=0,0001), до уровня десны (p=0,02), до уровня коронки второго моляра (p=0,002); в возрастной группе 14—17 лет на стадии прорезывания до уровня коронки второго моляра (p=0,02). В глубоком отделе отличия уставлены только в возрасте 14—17 лет на стадии до уровня коронки второго моляра (p=0,02). Интенсивность ПП фосфатов (967 см−1) снижается при ДСТ на всех стадиях прорезывания, кроме стадии зачатка, однако именно в этой стадии также снижается интенсивность ПП 1050 см−1, что в целом свидетельствует о снижении содержания минеральной составляющей твердых тканей зубов при ДСТ. Интенсивность ПП коллагена (1202 и 1249 см−1) при ДСТ растет в дентине и снижается в эмали. Результаты микроскопического и биохимического исследования твердых тканей нижних третьих моляров показывают, что наличие коллагеновых волокон в дентине влияет на биохимические и механические свойства эмали через эмалево-дентинное соединение за счет прочного сцепления и правильной упаковки коллагеновых фибрилл. Purpose of the work is to evaluate the maturity of the hard tissues of the lower third molars at different stages of eruption in connective tissue dysplasia, based on the results of microscopic and biochemical methods. . The study involved 84 women in the age groups 14—17, 18—21, 22—26, 27—31, 32—36 years with and without connective tissue dysplasia who had teeth 38, 48, which were at different stages of eruption, extracted for orthodontic or emergency indications. After preparation of dentin, enamel and enamel-dentin junction samples according to our own methods, microscopic examination was carried out using a scanning electron microscope Jeol JCM-5700, the morphology of dental hard tissues was evaluated on a longitudinal section, as well as biochemical examination by IR spectroscopy, the position and intensity of absorption bands (AB) were determined at all stages. . Statistically significant differences between age groups in CTD were found in the superficial section: in the age group 22—26 years at the stages of rudiment (p=0.0001), up to the gingival level (p=0.02), up to the level of the crown of the second molar (p=0.002); in the age group 14—17 years at the stage of eruption up to the level of the crown of the second molar (p=0.0200). In the deep section, differences were established only at the age of 14—17 years at the stage up to the level of the crown of the second molar (p=0.0200). The intensity of AB phosphate (967 cm−1) decreases in CTD at all stages of eruption except for the rudimentary stage, but it is at this stage that the intensity of AB 1050 cm−1 also decreases, which generally indicates a decrease in the mineral content of dental hard tissues in CTD. The AB intensity of collagen (1202 and 1249 cm−1) in CTD increases in dentin and decreases in enamel. . The results of microscopic and biochemical examination of the hard tissues of lower third molars show that the presence of collagen fibers in dentin affects the biochemical and mechanical properties of enamel through enamel-dentin junction, due to strong adhesion and proper packing of collagen fibrils.

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Morphology of the human dental enamel

Cited by 9 publications

References 4 publications

Phase Transformations in a Human Tooth Tissue at the Initial Stage of Caries

Phase Transformations in a Human Tooth Tissue at the Initial Stage of Caries

The mineral content of the hard dental tissue of mesiodens

Evaluation of the influence of connective tissue dysplasia on morphologic and biochemical rearrangements in the organic and mineral matrix of lower third molars at different stages of eruption

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