Results 101 to 110 of about 104,365 (313)

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

Fluorine depth profiles in human enamel after different acid etching times

Australasian Orthodontic Journal, 1987
This study was designed to monitor fluorine concentration changes in the surface layer of enamel subjected to acid etching for orthodontic direct bonding.
Sampson W.J., Wookey C. W., Rouse J.
doaj   +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, Lennart Müller‐Thomsen, Stefan Huggenberger   +2 more
wiley   +1 more source

OBSERVATIONS ON STRUCTURAL FEATURES AND CHARACTERISTICS OF BIOLOGICAL APATITE CRYSTALS: 8. OBSERVATION ON FUSION OF HUMAN ENAMEL CRYSTALS [PDF]

, 1993
In a series of studies to investigate the basic structural features and characteristics of the biological apatite crystals, using a transmission electron microscope, we examined the ultrastructure of the human enamel, dentin, and bone crystals at near ...
Tatsuo, TERASHIMA, Yasuo, YAMASHITA, Takashi, ICHIJO   +2 more
core   +2 more sources

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, Faysal Bibi, Jean‐Renaud Boisserie, Jackson K. Njau, Ignacio de la Torre   +4 more
wiley   +1 more source

Developmental Defects of Enamel : an increasing reality in the everyday practice [PDF]

, 2014
Developmental defects of enamel (DDE) are daily encountered in clinical practice. DDE are alteration in quality and quantity of the enamel, caused by disruption and/or damage to the enamel organ during the amelogenesis process.
Mauro Capocci, Livia Ottolenghi, GUERRA, Fabrizio, CORRIDORE, DENISE, OTTOLENGHI, Livia, MAZUR, MARTA DANUTA, Fabrizio Guerra, Denise Corridore, CAPOCCI, MAURO, Marta Mazur   +9 more
core   +1 more source

Integrated microanatomy and microstructure of the maxillary tooth plate reveal a reinforced feeding system and tougher diet in Late Triassic Hyperodapedontinae (Rhynchosauria, Archosauromorpha)

The Anatomical Record, EarlyView.
Abstract Hyperodapedontine rhynchosaurs possessed a unique oral apparatus, long interpreted as an adaptation for processing abrasive and resistant plant material. However, the microanatomical and histological evidence supporting this interpretation remains poorly documented.
Caio A. Scartezini, Pedro L. B. Pruciano, Brodsky D. M. Farias, Marina B. Soares   +3 more
wiley   +1 more source

Ultrastructure of buffalo tooth enamel: a possible replacement for human teeth in laboratory research [PDF]

production takes place in several areas worldwide. In Brazil, buffalo are raised mainly in the Northern region, specifically in the Marajó archipelago, where most of the herd is slaughtered for meat. This makes possible the extraction of numerous healthy
Luana de Nazaré Silva Santana, Mayara Sabrina Luz, Nayara Cristina Monteiro Carneiro, Aline Marques Dias, Márcia Cristina dos Santos Guerra, Rafael Rodrigues Lima
core  

Features of temporary teeth hard tissues affecting caries resistance

Эндодонтия Today
Aim. Features of microscopic structure of enamel and dentin of intact temporary teeth, which are the cause of their reduced caries resistance.   Materials and methods. Current information in the electronic databases Google Scholar and PubMed was examined
I. V. Bagdasarova, M. V. Kostinskaya, Al. Kamme Miral   +2 more
doaj   +1 more source

Loss, persistence and reversal of phenotypic traits

Biological Reviews, EarlyView.
ABSTRACT The irreversibility of complex trait loss has long been a tenet of evolutionary biology. However, this idea is increasingly at odds with the numerous documented exceptions across the Tree of Life. We synthesise this growing body of evidence across a diverse array of taxa and traits, exploring the evolutionary conditions that enable ...
Giobbe Forni, Giuseppe Fusco, Filippo Nicolini, Heather Bruce, Andrea Luchetti   +4 more
wiley   +1 more source