Results 41 to 50 of about 291,123 (171)

Investigation of metal flow in bridge die extrusion of Alloy 6063 and subsequent effect on surface quality and weld seam integrity [PDF]

, 2013
This paper describes a detailed study of tube extrusion by simulation using finite element method (FEM). The finite element model used one-sixth of symmetry. The extrusion load, emperature evolution and metal flow were predicted.
Sheppard, Terry, Velay, Xavier, Niu, L.
core   +1 more source

Influence of working length determined by three different apex locators on the apical extrusion of debris following the instrumentation with rotary Ni–Ti instrumentation system

Endodontology, 2020
Aim: This study aimed to comparatively evaluate the influence of working length (WL) determined by three different electronic apex locators (EALs) on the apical extrusion of debris following the instrumentation with a rotary NiTi instrumentation system ...
Awantika Chand, Pragya Kumar, Sonali Taneja   +2 more
doaj   +1 more source

Actin dynamics and the Bmp pathway drive apical extrusion of proepicardial cells. [PDF]

Development, 2019
The epicardium, the outer mesothelial layer enclosing the myocardium, plays key roles in heart development and regeneration. During embryogenesis it arises from the proepicardium (PE), a cell cluster that appears in the dorsal pericardium (DP) close to the venous pole of the heart.
Andrés-Delgado L, Ernst A, Galardi-Castilla M, Bazaga D, Peralta M, Münch J, González-Rosa JM, Marques I, Tessadori F, de la Pompa JL, Vermot J, Mercader N.   +11 more
europepmc   +5 more sources

The effect of access cavity design on apical debris extrusion

Journal of Dental Materials and Techniques, 2023
Objective: This study aimed to evaluate the effect of access cavity design on the amount of apically extruded debris in maxillary molars.Methods: Twenty-eight extracted maxillary molars were selected for this study. Inclusion criteria were caries-free teeth with mature roots and similar mesiobuccal root dimensions.
openaire   +2 more sources

Comparison of apical and coronal extrusions using reciprocating and rotary instrumentation systems [PDF]

BMC Oral Health, 2015
The aim of this study was to compare the apical and coronal extrusions by using two reciprocating and two rotary instrumentation systems.Eighty extracted human single-rooted anterior teeth were randomly assigned to four groups. Four different root canal instrumentation systems were used according to the manufacturers instructions, including two ...
Lu, Yan, Chen, Min, Qiao, Feng, Wu, Ligeng   +3 more
openaire   +2 more sources

Effect of needle insertion depth and apical diameter on irrigant extrusion in simulated immature permanent teeth

Brazilian Oral Research, 2014
The aim of this study was to compare the amount of irrigant extrusion in simulated immature permanent teeth when the apical diameter and needle insertion depth were varied.
AKSEL Hacer, ASKERBEYLI Sevinc, CANBAZOGLU Cigdem, SERPER Ahmet   +3 more
doaj   +1 more source

A study on surface cracking in extrusion of aluminium alloy AA2014 [PDF]

, 2004
Surface cracking is generally recognised as one of the main defects occurring during the process of aluminium extrusion, especially in the case of the so called hard aluminium alloys.
Sheppard, Terry, Peng, Z.
core   +1 more source

Apical debris extrusion following photon-induced photoacoustic streaming, high-power laser, and other irrigation techniques: A systematic review

Photodiagnosis and Photodynamic Therapy
Objective: To summarize, critically analyze, compare, and synthesize existing data on apical debris extrusion associated with sonic irrigation, passive ultrasonic irrigation (PUI), apical negative pressure (ANP), high-power laser (HPL), and photon ...
Helena Cristina de Assis, Benjamin Salmon, Guilherme Nilson Alves dos Santos, Iago Ramirez, Manoel Damião Sousa-Neto, Amanda Pelegrin Candemil, Fabiane Carneiro Lopes-Olhê   +6 more
doaj   +1 more source

The apical submembrane cytoskeleton participates in the organization of the apical pole in epithelial cells [PDF]

, 1997
In a previous publication (Rodriguez, M.L., M. Brignoni, and P.J.I. Salas. 1994. J. Cell Sci. 107: 3145-3151), we described the existence of a terminal web-like structure in nonbrush border cells, which comprises a specifically apical cytokeratin ...
Ana L. Viciana, Viciana, A. L., Salas, Pedro J.I, Dora E. Vega-Salas, Hauri, H. P., Hans-Peter Hauri, Marcelo L. Rodriguez, Rodriguez, M. L., Hauri, Hans-Peter, Vega-Salas, D. E., Salas, P. J., Pedro J.I. Salas, Rodriguez, Marcelo L, Vega-Salas, Dora E, Viciana, Ana L, Rodriguez, Marcelo L., Vega-Salas, Dora E., Viciana, Ana L., Salas, Pedro J.I.   +18 more
core   +1 more source

Micro-computed tomographic evaluation of removal and extrusion of root filling material during canal retreatment

Bioscience Journal, 2016
This study aimed to assess the efficiency of manual and rotary techniques for removing root filling material in endodontic treated canals and to evaluate the extrusion of debris via apical foramen.
Kellen Cristina Mendes Azevedo, Analice Giovani Pereira, Maria Antonieta Veloso Carvalho de Oliveira, Luís Henrique Araújo Raposo, Manoel Damião Sousa-Neto, Jesus Djalma Pécora, João Carlos Gabrielli Biffi   +6 more
doaj   +3 more sources