Results 51 to 60 of about 215,818 (250)

Topographic Evaluation of Apex and Root Canal of Maxillary Premolars in an Iranian Population

Journal of Dental School, 2020
Objective: Knowledge about the internal anatomy of the root canal and apical foramen is a critical prerequisite for root canal therapy and is necessary for the success of endodontic treatment. This study aimed to determine the distance of apical foramen
Mandana Naseri, Mojgan Momayez, Zohreh Ahangari   +2 more
doaj   +1 more source

From network analysis to experimental validation: identification of regulators of non-muscle myosin II contractility using the folded-gastrulation signaling pathway

BMC Molecular and Cell Biology, 2023
The morphogenetic process of apical constriction, which relies on non-muscle myosin II (NMII) generated constriction of apical domains of epithelial cells, is key to the development of complex cellular patterns.
Andy Zhao, Sophia Varady, Madelyn O’Kelley-Bangsberg, Vicki Deng, Amy Platenkamp, Petra Wijngaard, Miriam Bern, Wyatt Gormley, Elaine Kushkowski, Kat Thompson, Logan Tibbetts, A. Tamar Conner, David Noeckel, Aidan Teran, Anna Ritz, Derek A. Applewhite   +15 more
doaj   +1 more source

Apical constriction induces tissue rupture in a proliferative epithelium [PDF]

, 2022
Abstract Apical-basal polarity is an essential epithelial trait controlled by the evolutionarily conserved PAR-aPKC polarity network. Deregulation of polarity proteins disrupts tissue organization during development and in disease, but the underlying mechanisms are unclear due to the broad implications of polarity ...
Mariana Osswald, André Barros-Carvalho, Ana M Carmo, Nicolas Loyer, Patricia C Gracio, Claudio Sunkel, Catarina C Homem, Jens Januschke, Eurico Morais-de-Sá   +8 more
openaire   +1 more source

Localized constrictive pericarditis causing apical pseudo-ballooning

Archives of Cardiovascular Diseases, 2011
Pericardium ;Pericarditeconstrictive ;Imagerie ;Imagerie parresonancemagnetiqueCP may involve only portions of the pericardium. In such cases, the condition is named‘localized CP’. Imaging methodologies play an important role in the diagnosis of thiscondition.A 55-year-old man with a history of tuberculosis presented with signs of heart failure.Chest X-
DI BELLA, Gianluca, GAETA, Michele, Lentini S.   +2 more
openaire   +3 more sources

Pulsed contractions of an actin–myosin network drive apical constriction [PDF]

Nature, 2008
Apical constriction facilitates epithelial sheet bending and invagination during morphogenesis. Apical constriction is conventionally thought to be driven by the continuous purse-string-like contraction of a circumferential actin and non-muscle myosin-II (myosin) belt underlying adherens junctions.
Adam C, Martin, Matthias, Kaschube, Eric F, Wieschaus   +2 more
openaire   +2 more sources

In vitro evaluation of the accuracy of Root ZX series electronic apex locators

Journal of Dental Sciences, 2009
To evaluate the accuracy of Root ZX series electronic apex locators (EALs) for locating the apical constriction. Materials and methods: Forty-two extracted human teeth were mounted in the same experimental apparatus used for research on Root ZX series ...
Bor-Ren Duh
doaj   +1 more source

A microcomputed tomographic analysis of the morphological variabilities and incidence of extra canals in mandibular first molar teeth in an Egyptian subpopulation

Scientific Reports, 2023
A well-protected microbial habitat may be present in the root and canal morphology, which is varied and complicated. Before initiating effective root canal treatment, a detailed knowledge of the root and canal anatomical variances in each tooth is a must.
Shehabeldin Mohamed Saber, Mohamed Mohamed Elashiry, Shaimaa Mohamed Abu El Sadat, Nawar Naguib Nawar   +3 more
doaj   +1 more source

Modelling apical constriction in epithelia using elastic shell theory [PDF]

Biomechanics and Modeling in Mechanobiology, 2009
Apical constriction is one of the fundamental mechanisms by which embryonic tissue is deformed, giving rise to the shape and form of the fully-developed organism. The mechanism involves a contraction of fibres embedded in the apical side of epithelial tissues, leading to an invagination or folding of the cell sheet.
Jones, Gareth Wyn; id_orcid 0000-0001-6218-0367, Chapman, S. Jonathan   +1 more
openaire   +5 more sources

Differential Thresholds of Proteasome Activation Reveal Two Separable Mechanisms of Sensory Organ Polarization in C. elegans

Frontiers in Cell and Developmental Biology, 2021
Cephalization is a major innovation of animal evolution and implies a synchronization of nervous system, mouth, and foregut polarization to align alimentary tract and sensomotoric system for effective foraging.
Patricia Kunz, Christina Lehmann, Christian Pohl   +2 more
doaj   +1 more source

Atom Probe Tomography as an Emerging Tool for Understanding Defect‑Driven Mechanisms in HfO2‑Based Ferroelectrics

Advanced Functional Materials, EarlyView.
This Perspective highlights atom probe tomography as a powerful tool for understanding the atomic‐scale defect chemistry in HfO2‐based ferroelectrics. 3D mapping of dopants, point defects, and interface chemistry can provide new insight into defect‐driven mechanisms underpinning the ferroelectricity in the system and guide the design of more reliable ...
Kasper Hunnestad, Catherine Dubourdieu, Alexei Gruverman, Dennis Meier   +3 more
wiley   +1 more source