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Comparison of measurement of the apical anatomy of maxillary central incisors using cone-beam computed tomography and conventional intraoral radiographs. [PDF]

BMC Oral Health
Henriksen JS, Lauridsen E, Jensen SS, Darvann TA, Murakami S, Tsujimoto T, Uchimoto Y, Hermann NV.   +7 more
europepmc   +1 more source

Mechanochemical bistability as a principle of robust morphogenesis. [PDF]

Mechanobiol Med
Xue SL.
europepmc   +1 more source

Synthetic lumen rounding directs neural progenitor division mode

Marchenko M, Martínez Ara G, Pulikkal J, Ishihara K, Ebisuya M.   +4 more
europepmc   +1 more source

Rho signaling pathway and apical constriction in the early lens placode

Genesis, 2011
AbstractEpithelial invagination in many model systems is driven by apical cell constriction, mediated by actin and myosin II contraction regulated by GTPase activity. Here we investigate apical constriction during chick lens placode invagination. Inhibition of actin polymerization and myosin II activity by cytochalasin D or blebbistatin prevents lens ...
Forti Fl, Chao Yun Irene Yan
exaly   +4 more sources

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Unevenness of the Apical Constriction in Human Maxillary Central Incisors

Journal of Endodontics, 2008
This study examined the incisoapical extent of the apical constriction in 45 human maxillary central incisors. The null hypothesis was that the apical constriction is a flat ring. Our working hypothesis was that the constriction is actually uneven or "skewed" as it traces a path around the circumference of the canal.
James C McPherson
exaly   +3 more sources

Apical Constriction: Location and Dimensions in Molars—A Micro–Computed Tomography Study

Journal of Endodontics, 2014
The existence of the apical constriction has been repeatedly questioned. The aim of the present study was to validate the existence of the apical constriction and determine its location and dimensions in molars by using substantial micro-computed tomography analysis.Ninety human molars with 271 canals were evaluated.
Bernd J Pichler, Martin Judenhofer, Julia Mannheim   +2 more
exaly   +4 more sources

EphA7 modulates apical constriction of hindbrain neuroepithelium during neurulation in Xenopus

Biochemical and Biophysical Research Communications, 2016
Eph receptor tyrosine kinases (RTKs) and their ephrin ligands play multiple roles in the developing nervous system, including cell segregation, axon guidance and synaptic plasticity. Here we report the expression and function of EphA7 in Xenopus hindbrain development.
Bingyu Mao, Chaocui Li
exaly   +3 more sources

Maxillary first premolars: I. Morphology of the apical constriction

Journal of Nanjing Medical University, 2009
Abstract Objective To investigated the apical constriction morphology of maxillary first premolars in the Chinese population. Methods Eighty recently extracted human maxillary first premolars from a native Chinese population were used. The number and shape of apical constrictions were recorded under a dental operating microscope (DOM) at 12.5 ...
Daming Wu
exaly   +2 more sources

Influence of Apical Constriction Diameter on Root ZX Apex Locator Precision

Journal of Endodontics, 2007
Small-diameter hand files are systematically used to determine the initial working length and to establish patency of the root canal. In wide canals, electronic apex locator accuracy might be influenced by file size. This article reports on a study to assess the influence of apical constriction diameter on the precision of the Root ZX apex locator by ...
Camilo Abalos
exaly   +3 more sources