Abstract：
:No information could be found in the dental literature on the hardness or strength of the materials in root canal instruments. Hardness testing is a convenient method for examining these products, and strength properties can be deduced from available strength-hardness data. The Vickers hardness of cross-sections of stainless steel root canal files and reamers #15 and #40 made by three well-known manufacturers were determined. Significant differences in hardness were found between manufacturers and between the two sizes of two manufacturers' products. The Vickers hardness range was from 400 to 651, exceeding the range permitted by the AS 1411, and falling below the hardness required for many cutting instruments. The measurements indicate that the instruments are made from high-strength wire. The values obtained suggest that the properties of materials used for some endodontic files could be improved and provide a basis for the selection of superior materials for the future.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Brockhurst PJ,Denholm Idoi
10.1016/S0099-2399(96)80274-3subject
Has Abstractpub_date
1996-02-01 00:00:00pages
68-70issue
2eissn
0099-2399issn
1878-3554pii
S0099-2399(96)80274-3journal_volume
22pub_type
杂志文章abstract：:Regulated cell death (RCD) is a preferred term inclusive of all modes of cell death regulated by multiple intracellular signal transduction pathways under physiological and pathologic conditions. Although cell death programs ensure correct growth and developmental processes as well as protect the host against microbia...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2020.07.006
更新日期：2020-10-01 00:00:00
abstract：INTRODUCTION:This study evaluated the influence of glide path on canal curvature and axis modification after instrumentation with WaveOne Primary reciprocating files. METHODS:Thirty ISO 15, 0.02 taper Endo Training Blocks were used. In group 1, glide path was created with PathFile 1, 2, and 3 at working length, wherea...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.09.030
更新日期：2012-01-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to compare the efficacy of passive ultrasonic irrigation (PUI) and the EndoVac (EV) System (Discus Dental, Culver City, CA) in hard tissue debris removal and its influence on the quality of the root canal filling with the aid of micro-computed tomographic scanner. METHODS:Twenty-...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.05.001
更新日期：2015-10-01 00:00:00
abstract：INTRODUCTION:An ideal orthograde or retrograde filling material should seal the pathways of communication between the root canal system and its surrounding tissues. It should also be nontoxic, noncarcinogenic, nongenotoxic, biocompatible, insoluble in tissue fluids, and dimensionally stable. Mineral trioxide aggregate ...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2009.09.006
更新日期：2010-01-01 00:00:00
abstract：:There have been major recent reorganizations among bacterial taxa as a result of phylogenetic taxonomic approaches. As a consequence, old species have been renamed and novel species have been proposed. The introduction of molecular technology for microbial identification has also allowed the detection of microbial tax...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1097/00004770-200310000-00001
更新日期：2003-10-01 00:00:00
abstract：:Retrograde (or apical/periapical) peri-implantitis (RPI) presents with radiographic signs of bone loss at the periapical area of endosteal implants and may also present with clinical signs of abscess formation or a sinus tract traceable to the implant periapex. The lesion may form days up to several years after the in...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.01.002
更新日期：2019-05-01 00:00:00
abstract：INTRODUCTION:This study quantitatively evaluated the type and amount of image artifacts generated by different intracanal materials in birooted teeth scanned at different exposure parameters. METHODS:The sample consisted of 15 birooted premolars. Seven different intracanal material combinations were used in each tooth...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.11.007
更新日期：2019-02-01 00:00:00
abstract：INTRODUCTION:The alterations in dentin tissue depending on increasing age might cause different adhesion capability of bacteria, yielding differences in clinical approaches regarding root canal irrigation. This study, therefore, aimed to evaluate the effects of ethylenediaminetetraacetic acid (EDTA) and sodium hypochlo...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.01.008
更新日期：2010-05-01 00:00:00
abstract：INTRODUCTION:An accurate differential diagnosis of apical periodontitis (AP) and nasopalatine duct cyst (NPDC) should be established to define the best treatment for endodontically treated maxillary anterior teeth with apical periodontitis. Three-dimensional cone beam computed tomography (CBCT) images help to plan trea...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.11.022
更新日期：2011-03-01 00:00:00
abstract：INTRODUCTION:Warm vertically compacted gutta-percha obturation techniques use root canal sealers that are heated during the obturation. This study aims at investigating the suitability of selected sealers with warm gutta-percha obturation techniques. METHODS:The composition of an experimental sealer (Septodont; Saint ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2014.06.007
更新日期：2015-01-01 00:00:00
abstract：INTRODUCTION:Microorganisms are able to survive and cause persistent infection in the extraradicular area. The aims of this study were to investigate the primary bacterial flora and the localization of extraradicular biofilm in persistent apical periodontitis lesions. METHODS:Apical root samples from root-end surgery ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.03.004
更新日期：2012-07-01 00:00:00
abstract：:The purpose of this study was to compare clinical, radiographic, and histopathologic effects of Nd:YAG laser pulpotomy to formocresol pulpotomy on human primary teeth. Patients with at least two vital primary molar teeth that required pulpotomy, because of pulpal exposure to caries, were selected for this study. After...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2006.12.013
更新日期：2007-04-01 00:00:00
abstract：INTRODUCTION:Mineral trioxide aggregate (MTA) and calcium silicate (CS) cements exhibit acceptable levels of cytocompatibility. The aim of the present study was to evaluate MTA and CS cement genotoxicity in a human osteosarcoma cell line (MG63). METHODS:A mitochondrial colorimetric assay was used to evaluate the MG63 ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.03.039
更新日期：2010-07-01 00:00:00
abstract：:Analyses with the scanning electron microscope and the X-ray microprobe were performed on 13 silver cones removed from 12 patients. The cones showed changes that ranged from surface dulling to black corrosion and pitting. Sulfur and chlorine were detected at the apical end of the cones and in the biopsy specimens of p...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(75)80198-1
更新日期：1975-06-01 00:00:00
abstract：:A molar-incisor malformation (MIM) is a newly reported type of dental anomaly that involves a characteristic root malformation in permanent first molars and deciduous second molars and a crown defect in permanent central incisors. This case report describes a nonsurgical root canal treatment of a MIM-affected molar by...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.11.004
更新日期：2016-04-01 00:00:00
abstract：:The sealing properties of three temporary restorative materials, Cavit, IRM, and a polycarboxylate-based cement, Ultratemp Firm, were investigated in vitro. Standardized access cavities were prepared in 45, intact, extracted, human molars. The teeth were randomly assigned to three groups and the access openings filled...
journal_title：Journal of endodontics
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1097/01.don.0000121610.63000.f2
更新日期：2004-08-01 00:00:00
abstract：INTRODUCTION:The aims of this study were to examine the immunolocalization of protein phosphatase 1 (PP1) in developing mouse pulp tissue and to explore the role of PP1 in odontoblastic differentiation and in vitro angiogenesis in human dental pulp cells (HDPCs). METHODS:Immunolocalization of PP1 was assessed in devel...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.10.013
更新日期：2017-03-01 00:00:00
abstract：INTRODUCTION:The purpose of this study was to evaluate the influence of anorganic bovine bone as a grafted biomaterial on newly formed bone and cementum in periapical regions after surgical endodontic treatment in cats. METHODS:After inducing apical periodontitis in 9 cats, root canal and surgical endodontic treatment...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.10.002
更新日期：2012-02-01 00:00:00
abstract：:The putative hazardous nature of chloroform and xylene implies that safer substitutes should be considered. Standard cylindrical gutta-percha samples were immersed in Hemo-De, a xylene substitute, for 60 s at 37 degrees C. Weight loss of a sample, after drying, was used as a measure of its solubility. Master and acces...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200007000-00001
更新日期：2000-07-01 00:00:00
abstract：INTRODUCTION:Matrix extracellular phosphoglycoprotein (MEPE), a new member of the small integrin binding ligand N-glycosylated (SIBLING) family, is believed to play multifunctional roles in regulation of cell signaling, mineral homeostasis, and mineralization. METHODS:To study how MEPE affects the downstream genes inv...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.10.015
更新日期：2012-03-01 00:00:00
abstract：:Osteoradionecrosis (ORN) of the jaw is considered the most severe long-term adverse effect that can occur in radiation therapy patients. Teeth extractions and dental diseases are the main risk factors for ORN in irradiated patients. The aim of this case series was to evaluate the outcome of primary root canal treatmen...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.12.005
更新日期：2020-04-01 00:00:00
abstract：:This in vitro study compared the accuracy of file length measurements made on calibrated and uncalibrated direct digital images. Endodontic files of known lengths and ISO sizes were used in 10 single-rooted, relatively straight teeth within cadaver specimens. The crowns of the teeth were ground flat and an orthodontic...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200112000-00017
更新日期：2001-12-01 00:00:00
abstract：INTRODUCTION:The purpose of this study was to compare centering ability and apical canal transportation of K-files (KF), ProGlider (PG), and G-Files (GF) after glide path enlargement in curved canals by using micro-computed tomography. METHODS:Thirty canals each were randomly assigned to KF, GF, and PG. Teeth were sca...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.04.005
更新日期：2016-07-01 00:00:00
abstract：INTRODUCTION:Previously, we have shown that stem cells from apical papilla (SCAPs) can be chemoattracted by stromal cell-derived factor-1α (SDF-1α). The purpose of this study was to investigate the intracellular signaling pathways involved in SDF-1α-mediated migration of SCAPs. METHODS:Chemotaxis assays were performed...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.04.014
更新日期：2016-07-01 00:00:00
abstract：:This study investigated possible collateral C-fiber innervation between the pulps of rat molars by assessing neurogenic inflammation (NI) induced by the C-fiber excitant mustard oil (MO). MO was applied to the pulp of the left mandibular first molar in two groups of rats: group 1, guanethidine sympathectomized rats (t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(96)80242-1
更新日期：1996-08-01 00:00:00
abstract：INTRODUCTION:This study used micro-computed tomographic imaging to compare the shaping ability of Mtwo (VDW, Munich, Germany), a conventional nickel-titanium file system, and Reciproc (VDW), a reciprocating file system morphologically similar to Mtwo. METHODS:Root canal shaping was performed on the mesiobuccal and dis...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2013.12.032
更新日期：2014-08-01 00:00:00
abstract：:A case report is presented describing the treatment for endemic dental fluorosis. Six maxillary anterior teeth were treated, three with an acid-bleach combination technique and three with an acid technique. No clinical differences was noted in treatment time or esthetic results. ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81703-6
更新日期：1991-07-01 00:00:00
abstract：INTRODUCTION:More information regarding the ability of single files to maintain the original canal position is required before adopting a single-file approach to cleaning and shaping. This study compares apical transportation in curved root canals when instrumenting with a single WaveOne (WO) file (Dentsply Tulsa Denta...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2013.09.021
更新日期：2014-05-01 00:00:00
abstract：:This study evaluated the degree of conversion of one dual-cured resin cement when used to lute fiber posts with different translucencies. To measure the degree of conversion, polyvinylsiloxane molds were prepared to simulate root canals. The posts, Aestheti-Post or Light-Post, were cemented in these molds and, after p...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2006.11.015
更新日期：2007-03-01 00:00:00
abstract：INTRODUCTION:This study aimed to investigate dental pulp responses to novel bioactive glass (BG) pulp capping materials after direct pulp capping in vivo. METHODS:Novel BG pulp capping materials are composed of powder and fluid. The powder is BG (82.36% SiO2, 15.36% CaO, and 2.28% P2O5), and the fluid is provided in 2...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2017.03.011
更新日期：2017-10-01 00:00:00
