Results 91 to 100 of about 104,244 (313)
Dental Research Journal, 2013 Background: Polymerization of resin-modified glass-ionomers (RMGIs) is mediated through two competing mechanisms: An acid-base reaction and a light-dependent resin polymerization.
Maryam Khoroushi +2 more
doaj +1 more source
Changes in the Enamel Protein during Enamel Formation
THE JOURNAL OF THE STOMATOLOGICAL SOCIETY,JAPAN, 1973 幼若エナメル質中に含まれている有機質のほとんどを占めている蛋白質は多成分系である事が知られている。それらのうちのどの成分が生理的に重要なのかを明らかにする目的で, 先ずラット幼若エナメル蛋白質についてゲル濾過クロマトグラフィーとSDS-ポリアクリルアミドゲル電気泳動を行なって, 石灰化の進行に伴う蛋白質のパターンの変化を調べた。続いて, ラットに3H-prolineを静注し, そのエナメル質への取込みの時間的な変化をゲル濾過クロマトグラフィーとポリアクリルアミドゲル電気泳動を行なって調べた。その結果は若いstageのmain componentである分子量約20, 000のproline, glutamic acid, histidineに富む成分が初期に多く脱却し, 石灰化が進むに従って分子量15,
openaire +3 more sources
The crystallographic structure of dental enamel and related apatites
, 1964 PhDSynthetic, biological and mineralogical carbonate-containing apatites have been studied, principally by infra-red absorption spectroscopy (using polarised or unpolarised radiation), The substitution of a carbonate ion for two hydroxyl ions in the ...
Elliott, James Cornelis
core
Susceptibility of enamel to initial erosion in relation to tooth type, tooth surface and enamel depth [PDF]
, 2015 This study aimed at assessing the susceptibility of different tooth types (molar/premolar), surfaces (buccal/lingual) and enamel depths (100, 200, 400 and 600 μm) to initial erosion measured by surface microhardness loss (ΔSMH) and calcium (Ca) release ...
Saads Carvalho, Thiago, Lussi, Adrian
core +1 more source
Early stages of tooth development in the harbor porpoise Phocoena phocoena
The Anatomical Record, EarlyView.Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes +2 more
wiley +1 more source
Dental anomalies in Pleistocene African hippopotamuses from Olduvai Bed II
The Anatomical Record, EarlyView.Abstract Hippopotamuses are key palaeoenvironmental indicators in African Pleistocene ecosystems due to their ecological dependence on permanent water bodies and their frequent representation in the fossil record. This study examines dental anomalies in Hippopotamus cf. gorgops from several localities in Bed II of Olduvai Gorge (Tanzania), dated to ca.
Darío Fidalgo +4 more
wiley +1 more source
Applied SciencesThe aim was to evaluate the effect of different whitening toothpastes on the enamel surface roughness and color variation. Twenty-four molars were sectioned and divided into eight groups (n = 3) considering the following two factors under study ...
Angel Lobito +5 more
doaj +1 more source
Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade
Biological Reviews, EarlyView.ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan +2 more
wiley +1 more source
Boletín de la Sociedad Española de Cerámica y Vidrio, 2010 The obtaining of mechanical properties as elastic modulus and hardness of enamel and dentin has been an important topic of study in material science. Due to the small size of the samples, nanoindentation test becomes an ideal technique for determining ...
Ceballos, L. +4 more
doaj
Microhardness and chemical composition of human tooth
Materials Research, 2003 Hardness of human tooth, both in enamel and dentin, has been measured at different sites using a Vicker's diamond. In this work we show that these values are almost constant all along the enamel and dentin thicknesses.
Maria del Pilar Gutiérrez-Salazar +1 more
doaj +1 more source