نتایج جستجو برای: tooth development

تعداد نتایج: 1494636  

Journal: :American journal of veterinary research 1960
W A BROWN P V CHRISTOFFERSON M MASSLER M B WEISS

INTEREST in the teeth of cattle dates from the latter half of the nineteenth century when disputes as to the age of veal carcasses were settled by the state of eruption and amount of wear of the incisor teeth. Recently, additional attention has been drawn to the teeth of cattle by the recognition of the role played by fluorides in the mottling of the teeth. Many studies have been done to classi...

Journal: :Journal of experimental zoology. Part B, Molecular and developmental evolution 2009
Lisa Diep Eva Matalova Thimios A Mitsiadis Abigail S Tucker

This study highlights the dynamic nature of the mesenchymal cells during tooth development from the bud to the bell stage. Condensing mesenchymal cells, labelled on either side of the developing tooth bud, move toward the presumptive roots forming an arc of cells under the dental papilla. These labelled cells take part in formation of the dental follicle, which contributes to both the tooth and...

Journal: :journal of dentistry, tehran university of medical sciences 0
m memarpour associate professor, pediatric dentistry department, school of dentistry, shiraz university of medical sciences, shiraz, iran. m rahimi a bagheri k mina

primary tooth impaction is a rare finding during the development of primary dentition. several factors contribute to the impaction of a deciduous tooth. this report describes the diagnosis and treatment of a 10-year-old boy who presented an impacted second primary mandibular molar. this tooth, located inferior to the second premolar together with an odontoma, was positioned superior to the prem...

Journal: :Development 2012
Jukka Jernvall Irma Thesleff

Teeth are found in almost all vertebrates, and they therefore provide a general paradigm for the study of epithelial organ development and evolution. Here, we review the developmental mechanisms underlying changes in tooth complexity and tooth renewal during evolution, focusing on recent studies of fish, reptiles and mammals. Mammals differ from other living vertebrates in that they have the mo...

2014
Guohua Yuan Guobin Yang Yuqian Zheng Xiaojing Zhu Zhi Chen Zunyi Zhang YiPing Chen

BMP and Wnt signaling pathways play a crucial role in organogenesis, including tooth development. Despite extensive studies, the exact functions, as well as if and how these two pathways act coordinately in regulating early tooth development, remain elusive. In this study, we dissected regulatory functions of BMP and Wnt pathways in early tooth development using a transgenic noggin (Nog) overex...

Journal: :FASEB journal : official publication of the Federation of American Societies for Experimental Biology 2010
Yann Gibert Laure Bernard Melanie Debiais-Thibaud Franck Bourrat Jean-Stephane Joly Karen Pottin Axel Meyer Sylvie Retaux David W Stock William R Jackman Pawat Seritrakul Gerrit Begemann Vincent Laudet

One of the goals of evolutionary developmental biology is to link specific adaptations to changes in developmental pathways. The dentition of cypriniform fishes, which in contrast to many other teleost fish species possess pharyngeal teeth but lack oral teeth, provides a suitable model to study the development of feeding adaptations. Here, we have examined the involvement of retinoic acid (RA) ...

Journal: :The Journal of biological chemistry 2001
Y Ito J Zhao A Mogharei C F Shuler M Weinstein C Deng Y Chai

Members of the transforming growth factor-beta (TGF-beta) superfamily regulate cell proliferation, differentiation, and apoptosis, controlling the development and maintenance of most tissues. TGF-beta signal is transmitted through the phosphorylation of Smad proteins by TGF-beta receptor serine/threonine kinase. During early tooth development, TGF-beta inhibits proliferation of enamel organ epi...

Journal: :International Journal of Molecular Sciences 2020

Odontogenic tumors contain a heterogeneous collection of lesions that are categorized from hamartomas to benign and malignant neoplasms of inconstant aggressiveness. Odontogenic tumors are usually extraordinary with assessed frequency of short of 0.5 cases/100,000 population for every year. The lesions such as odontogenic tumors are inferred from the components of the tooth-structuring contrapt...

Journal: :Acta Crystallographica Section A Foundations and Advances 2015

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