نتایج جستجو برای: composite core

تعداد نتایج: 333718  

2012
Ramin Mosharraf Najmeh Baghaei Yazdi

PURPOSE Debonding of a composite resin core of the fiber post often occurs at the interface between these two materials. The aim of this study was to evaluate the effects of different surface treatment methods on bond strength between fiber posts and composite core. MATERIALS AND METHODS Sixty-four fiber posts were picked in two groups (Hetco and Exacto). Each group was further divided into f...

Journal: :Nanoscale 2016
Yongxin Liu Ting Liu Long Tian Linlin Zhang Lili Yao Taixing Tan Jin Xu Xiaohui Han Dan Liu Cheng Wang

Controllable integration of metal nanoparticles (MNPs) and metal-organic frameworks (MOFs) is attracting considerable attention as the obtained composite materials always show synergistic effects in applications of catalysis, delivery, as well as sensing. Herein, a Cu2O-directed in situ growth strategy was developed to integrate Au nanoparticles and HKUST-1. In this strategy, Cu2O@HKUST-1 core-...

2011
Chetana S. Makade Ganesh K. Meshram Manjusha Warhadpande Pravinkumar G. Patil

PURPOSE To compare the fracture resistance and the mode of failure of endodontically treated teeth restored with different post-core systems. MATERIALS AND METHODS Root canal treatment was performed on 40 maxillary incisors and the samples were divided into four groups of 10 each. For three experimental groups post space preparation was done and teeth were restored with cast post-core (Group ...

2017
Jinlong Du Chunwei Shi Wenyuan Wu Xue Bian Ping Chen Qingzhu Cui Zhixuan Cui

Composite molecular sieves, FAU/SBA-15, having core-shell structure were synthesized. The synthesized composite sieves were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), pyrolysis fourier transform infrared (Py-FTIR) spectroscopy, temperature programmed desorption spectra (NH3-...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2007
Jun-Hyun Kim T Randall Lee

In this paper, we describe a unique strategy for preparing discrete composite nanoparticles consisting of a large gold core (60-150 nm in diameter) surrounded by a thermally responsive nontoxic hydrogel polymer derived from the polymerization of N-isopropylacrylamide (NIPAM) or a mixture of NIPAM and acrylic acid. We synthesize these composite nanoparticles at room temperature by inducing the g...

Journal: :The journal of contemporary dental practice 2008
Horieh Moosavi Fathemeh Maleknejad Soodabeh Kimyai

AIM The aim of this in vitro study was to compare the fracture resistance of endodontically-treated anterior teeth with their roots reinforced using three different restorative methods. METHODS AND MATERIALS Forty sound maxillary human central incisors were randomly assigned to four groups (n=10). The crowns of the teeth were removed at a level 2 mm incisal to the cementoenamel junction (CEJ)...

Journal: :Dental Materials 2021

The aim was to investigate the fatigue survival and marginal-gap inside root-canal of endodontically treated (ET) premolars reinforced by various fiber-reinforced post-core composites (FRCs). Moreover, composite-curing at different depths in canal evaluated. 170 intact upper-premolars were collected randomly divided into ten groups (n = 15). One group served as control (intact-teeth). After end...

Journal: :Nano letters 2006
Michal Lahav Emily A Weiss Qiaobing Xu George M Whitesides

Composite nanostructures (approximately 200 nm wide and several micrometers long) of metal and polyaniline (PANI) in two new variations of core-shell (PANI-Au) and segmented (Au-PANI and Ni-Au-PANI) architectures were fabricated electrochemically within anodized aluminum oxide (AAO) membranes. Control over the structure of these composites (including the length of the gold shells in the core-sh...

2010
M. Richeson U. Erturun R. Waxman K. Mossi J. Kunikata H. Asanuma

The objective of this study is to design and characterize a piezoelectric composite and evaluate its suitability for viscosity-measuring applications, i.e., monitoring the coagulation rate of blood. The composite is manufactured of a platinum-core lead zirconate titanate (PZT) fiber inserted into an aluminum matrix. This study characterizes the described composite by testing its impedance, capa...

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