Scanning Electron Microscopy Evaluation of Dental Root Resorption Associated With Granuloma

2015 ◽  
Vol 21 (5) ◽  
pp. 1264-1270 ◽  
Author(s):  
Manila Chieruzzi ◽  
Stefano Pagano ◽  
Carlo De Carolis ◽  
Stefano Eramo ◽  
José M. Kenny
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Root Resorption ◽  
Root Apex ◽  
Average Diameter ◽  
Root Structure ◽  
Human Teeth ◽  
Periapical Lesions ◽  
Carious Lesions ◽  
Scanning Electron

AbstractThe inflammatory resorption of dental root apex (i.e., the process of removal of cementum and/or dentine through the activity of resorbing cells) may show different configurations and damage the apical root structure. As knowing the morphology of resorption areas of human teeth is essential for the success of endodontic treatments, we investigated the apical resorption by scanning electron microscopy, focusing on roots with granulomas. A total of 30 teeth (with penetrating carious lesions and chronic periapical lesions) were examined, the apical third of the roots were removed and analyzed to estimate periforaminal and foraminal resorption, shape and morphology of foramen resorption, centering of the periforaminal resorption area, and diameters of each apical foramen. Periforaminal resorption was present in all samples, whereas foraminal resorption was present in 92% of cases (mainly funnel shaped). Lacunae were observed in the foraminal resorption area with an average diameter of 35±14 μm. The major and minor diameters of the foramina in teeth with resorption were 443 and 313 μm, respectively (higher than in healthy teeth). This result indicates an expansion of the apical diameters caused by the pathology, which could encourage a different clinical instrumentation for these teeth.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

Scanning electron microscopy investigation of tooth/filling bonding

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Joanna Siejka-Kulczyk ◽  
Małgorzata Lewandowska ◽  
Marta Raczyńska ◽  
Elżbieta Jodkowska ◽  
Krzysztof J. Kurzydłowski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Teeth ◽  
Bonding Quality ◽  
Dental Fillings ◽  
Microscopy Investigation ◽  
Electron Microscopy Investigation ◽  
Scanning Electron Microscopy Investigation ◽  
Tissue Material ◽  
Scanning Electron

AbstractScanning electron microscopy (SEM) investigations have been conducted to determine the influence of selected material on tissue/material bonding. Extracted human teeth were used in this study. Several resin composites were tested as dental fillings. To reveal the structure of the tissue/filling interface, the teeth were cut parallel to the long axis. Bonding quality was determined by direct SEM observation and microanalysis with X-ray energy spectrometry (EDX). The investigated materials show good bonding with enamel.

scholarly journals Effects of Dentifrices Containing Nanohydroxyapatite on Dentinal Tubule Occlusion—A Scanning Electron Microscopy and EDX Study

2020 ◽  
Vol 10 (18) ◽  
pp. 6513
Author(s):  
Emilia Bologa ◽  
Simona Stoleriu ◽  
Gianina Iovan ◽  
Cristina Angela Ghiorghe ◽  
Irina Nica ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Study Groups ◽  
Control Group ◽  
Dentinal Tubule ◽  
Human Teeth ◽  
Dentinal Tubules ◽  
Mineral Deposition ◽  
Tubule Occlusion ◽  
Scanning Electron

This in vitro study evaluated the effects of dentifrices containing nano-hydroxyapatite (n-HAp) on dentinal tubule occlusion and on mineral deposition. Dentin specimens of ten human teeth were submersed for 30 s in 40% citric acid and then randomly divided into four groups (three study groups and one control group). In the study groups, the dentin samples were exposed to three different n-HAp toothpastes: Karex (Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany), Biorepair Plus Sensitive (Coswell SpA, Bologna, Italy), and Dr. Wolff’s Biorepair (Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany); in the control group no toothpaste was applied. All of the samples were evaluated using scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analysis. In the control group all of the samples showed a frank and wide opening of the dentinal tubules, whereas in the study groups different degrees of tubule closure by mineral depositions were observed. Toothpastes containing n-HAp determined a significant occlusion of dentinal tubules and a significant increase of mineral deposition on the dentin surface. All three tested toothpastes showed similar results regarding the degree of dentinal tubule closure. Varying degrees of differences in calcium, phosphate, carbon, and oxygen ion concentrations among the three tested toothpastes were obtained.

Scanning Electron Microscopy of the Apical Structure of Human Teeth

2007 ◽  
Vol 31 (4) ◽  
pp. 321-325 ◽  
Author(s):  
Mário Roberto Leonardo ◽  
Marcos Antonio Rossi ◽  
Kleber Cortês Bonifácio ◽  
Léa Assed Bezerra da Silva ◽  
Sada Assed
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Teeth ◽  
Scanning Electron

Synthesis and Thermal Stability of Nontransformable Tetragonal (ZrO2)0.96(REO1.5)0.04 (Re=Sc3+, Y3+) Nanocrystals

2013 ◽  
Vol 334-335 ◽  
pp. 60-64 ◽  
Author(s):  
Mohammad Reza Loghman-Estark ◽  
Reza Shoja Razavi ◽  
Hossein Edris
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Sol Gel ◽  
Average Diameter ◽  
X Ray ◽  
Transmission Electron ◽  
20 Nm ◽  
Thermal Stability Of ◽  
Scanning Electron

Scandia, yttria doped zirconia ((ZrO2)0.96(REO1.5)0.04(RE=Sc3+, Y3+)) nanoparticles were prepared by the modified sol-gel method. The microstructure of the products was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. Thermal stabillity of SYSZ nanocrystals were also investigated. The SYSZ nanocrystals synthesized with EGM:Zr+4mole ratio 4:1, calcined at 700°C, have average diameter of ~20 nm.

scholarly journals Scanning Electron Microscopy of Root Resorption of Feline Teeth

2004 ◽  
Vol 66 (12) ◽  
pp. 1579-1581 ◽  
Author(s):  
Shigeo OHBA ◽  
Masato KUWABARA ◽  
Hiroshi KAMATA ◽  
Masayuki YUKAWA ◽  
Hideo KIBA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Root Resorption ◽  
Scanning Electron

Effection of Additive on Aluminum Nitride Nano-Wire Synthesis by Double Decomposition Method

2013 ◽  
Vol 744 ◽  
pp. 428-431
Author(s):  
Yan Long Sun ◽  
Li Min Dong ◽  
Tao Jiang ◽  
Cao Guo ◽  
Xiao Qi Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Stainless Steel ◽  
Aluminum Nitride ◽  
Decomposition Method ◽  
Average Diameter ◽  
X Ray Diffraction ◽  
X Ray ◽  
Double Decomposition ◽  
Scanning Electron

An method for making AlN(aluminum nitride) nanowires by double decomposition, and the effection of additives was described. Future more, the growth mechanism of AlN nanowire synthesis with addictive were analyzed. AlN nanowire were synthesis by he AlCl3 and NaN3 in stainless steel cauldron without solvent and using Mg and Zn as additive. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study characters of the AlN nanowire. It is shown that the process can produce AlN nanowire with mean diameters ranging from 50 to 100 nm at 450°C. The additive has effective facilitated on the synthesis of aluminum nitride nanowires, can improve the properties of aluminum nitride nanowire, minish the average diameter of aluminum nitride nanowires.

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