Results 91 to 100 of about 458,541 (206)

A review of the eruption of primary teeth. [PDF]

open access: yes, 2014
Introduction Eruption of deciduous teeth remains a rather sophisticated process. This paper gives a general overview of the process and explores on its implications.
Chu, CH, Yeung, CYYJ
core  

Gene expression analysis of bovine embryonic disc, trophoblast and parietal hypoblast at the start of gastrulation [PDF]

open access: yes, 2017
In cattle early gastrulation-stage embryos (Stage 5), four tissues can be discerned: (i) the top layer of the embryonic disc consisting of embryonic ectoderm (EmE); (ii) the bottom layer of the disc consisting of mesoderm, endoderm and visceral hypoblast
Berg, D   +3 more
core   +2 more sources

The Dentition of Cypriniform Fishes as a Model for the Nature of Developmental Constraints on Evolution [PDF]

open access: yes, 2014
The extent to which constraints on adaptive evolution are imposed by the genetic and developmental architecture of organisms is a fundamental question in evolutionary biology.
Szymaszek, Julie Françoise
core   +2 more sources

Prenatal ultrasound and postmortem histologic evaluation of tooth germs: an observational, transversal study [PDF]

open access: yes, 2015
Introduction: Hypodontia is the most frequent developmental anomaly of the orofacial complex, and its detection in prenatal ultrasound may indicate the presence of congenital malformations, genetic syndromes and chromosomal abnormalities.To date, only a ...
A Kapdan   +33 more
core   +2 more sources

Patterns of Glycoconjugate Distribution during Molar Tooth Germ Development in Mice

open access: yesFrontiers in Dentistry, 2007
Objective: The aim of the present study was to evaluate the structure and distribution of Glycoconjugates during molar tooth germ development in mice Materials and Methods: Sixteen tooth germs were obtained from BALB/c mice embryos 15 to 18 days post ...
T. Kermani   +1 more
doaj  

Role of estrogen related receptor beta (ESRRB) in DFN35B hearing impairment and dental decay [PDF]

open access: yes, 2014
BACKGROUND: Congenital forms of hearing impairment can be caused by mutations in the estrogen related receptor beta (ESRRB) gene. Our initial linkage studies suggested the ESRRB locus is linked to high caries experience in humans. METHODS: We tested for
Abreu, Fernanda V.   +31 more
core   +5 more sources

A possible etiology for the dilaceration and flexion of permanent tooth roots relative to bone remodeling gradients in alveolar bone

open access: yesDental Hypotheses, 2014
Introduction: Trauma, altered tooth germ position and delayed tooth eruption have been hypothesized as possible causes of tooth root dilacerations and flexion, however these anatomical variations appear more commonly associated with posterior teeth and ...
Richard G Standerwick
doaj   +1 more source

Epithelial label-retaining cells are absent during tooth cycling in Salmo salar and Polypterus senegalus [PDF]

open access: yes, 2016
The Atlantic salmon (Salmo salar) and African bichir (Polypterus senegalus) are both actinopterygian fish species that continuously replace their teeth without the involvement of a successional dental lamina.
Fjelldal, P.G.   +4 more
core  

Human tooth germ stem cell response to calcium-silicate based endodontic cements.

open access: yesJournal of Applied Oral Science, 2013
OBJECTIVE The aim of this study was to compare the cytotoxic effects of endodontic cements on human tooth germ stem cells (hTGSCs). MTA Fillapex, a mineral trioxide aggregate (MTA)-based, salicylate resin containing root canal sealer, was compared with ...
E. Güven   +5 more
semanticscholar   +1 more source

Research progress on pathogenic genes and molecular mechanisms of nonsyndromic tooth agenesis

open access: yes口腔疾病防治, 2020
Tooth agenesis is a common tooth number deficiency that occurs in the tooth-forming process or earlier period of tooth germ development and has a serious impact on the maxillofacial development, aesthetics and masticatory function of patients.
XIE Weihong, YU Dongsheng, ZHAO Wei
doaj   +1 more source

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