The effect of instrumentation with two different file types, each with 2.5% NaOCl irrigation on the microhardness of root dentin.


:The aim of this study was to measure root-dentin microhardness after instrumentation with two types of files and using irrigation with 2.5% sodium hypochlorite. Thirty roots were instrumented with irrigation: 10 roots had the pulp extirpated only; 10 roots were instrumented with stainless steel files, and 10 roots were instrumented with rotary nickel-titanium (NiTi) files. Additionally, five roots were extirpated only without irrigation and served as a control. The roots were sliced and root-dentin microhardness was determined at depths of 500 microm and 1000 microm from the pulp-dentin interface. Significant differences were found between the microhardness at 500 microm and 1000 microm (p < 0.001) in all groups. Instrumentation with NiTi rotary files affected dentin microhardness significantly to a lesser extent.


J Endod


Journal of endodontics


Slutzky-Goldberg I,Liberman R,Heling I





Has Abstract


2002-04-01 00:00:00














  • Root canal anatomy preservation of WaveOne reciprocating files with or without glide path.

    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


    authors: Berutti E,Paolino DS,Chiandussi G,Alovisi M,Cantatore G,Castellucci A,Pasqualini D

    更新日期:2012-01-01 00:00:00

  • An evaluation of canal morphology at different levels of root resection in mandibular incisors.

    abstract::One hundred randomly selected mandibular incisors were examined to assess the prevalence and location of two canals and to describe the canal anatomy that may be encountered during apical surgery. Sections of the root were cut at 1, 2, and 3 mm from the apex, simulating a 20-degree beveled surgical resection. The sect...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Mauger MJ,Schindler WG,Walker WA 3rd

    更新日期:1998-09-01 00:00:00

  • Effect of different irrigation on smear layer removal after post space preparation.

    abstract::The purpose of this study was to evaluate the effect of different irrigating solutions on smear layer removal and dentinal tubule opening on root canal surfaces after post space preparation and to study whether additional ultrasonic irrigation has any effect on smear layer removal. Forty-eight anterior teeth were trea...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Gu XH,Mao CY,Kern M

    更新日期:2009-04-01 00:00:00

  • Extracellular dextran and DNA affect the formation of Enterococcus faecalis biofilms and their susceptibility to 2% chlorhexidine.

    abstract:INTRODUCTION:Enterococcus faecalis is frequently recovered from root-filled teeth with refractory apical periodontitis. The ability of E. faecalis to form a matrix-encased biofilm contributes to its pathogenicity; however, the role of extracellular dextran and DNA in biofilm formation and its effect on the susceptibili...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Li W,Liu H,Xu Q

    更新日期:2012-07-01 00:00:00

  • Comparison of the cleaning efficacy of passive sonic activation and passive ultrasonic activation after hand instrumentation in molar root canals.

    abstract::The purpose of this study was to compare the cleaning efficacy of passive ultrasonic activation with that of passive sonic activation after hand instrumentation. Sixty curved molar canals were hand-instrumented to size 35 and divided into three groups. Group 1 received no further treatment. Group 2 received 3 min of p...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Jensen SA,Walker TL,Hutter JW,Nicoll BK

    更新日期:1999-11-01 00:00:00

  • Effect of a Combination of Intranasal Ketorolac and Nitrous Oxide on the Success of the Inferior Alveolar Nerve Block in Patients with Symptomatic Irreversible Pulpitis: A Prospective, Randomized, Double-blind Study.

    abstract:INTRODUCTION:Previous studies in patients with irreversible pulpitis have reported increased success of the inferior alveolar nerve block (IANB) using premedication with ketorolac. Preemptive nitrous oxide administration has also shown an increase in the success of the IANB. Recently, ketorolac has been made available ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Stentz D,Drum M,Reader A,Nusstein J,Fowler S,Beck M

    更新日期:2018-01-01 00:00:00

  • RAGE mRNA expression and its correlation with nuclear factor kappa beta mRNA expression in inflamed human periradicular tissues.

    abstract::Advanced glycation end products (AGEs) have been found to play a role in inflammation and vascular complications. The receptor for AGE (RAGE) is expressed on many cells and is up-regulated during inflammation. To date, RAGE expression or its correlation with nuclear factor kappa beta (NF-kappabeta) expression has not ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Crabtree M,Pileggi R,Bhattacharyya I,Caudle R,Perez F,Riley J,Vertucci F,Katz J

    更新日期:2008-06-01 00:00:00

  • Evaluation of Root Canal Dentin Erosion after Different Irrigation Methods Using Energy-dispersive X-ray Spectroscopy.

    abstract:INTRODUCTION:The purpose of this study was to examine the level of erosion in root dentin caused by different irrigation methods and protocols. METHODS:Thirty-five extracted upper molar teeth were instrumented and divided into 7 groups to undergo treatment by different methods: negative control, GentleWave System (Son...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Wang Z,Maezono H,Shen Y,Haapasalo M

    更新日期:2016-12-01 00:00:00

  • Prevalence of new candidate pathogens Prevotella baroniae, Prevotella multisaccharivorax and as-yet-uncultivated Bacteroidetes clone X083 in primary endodontic infections.

    abstract:INTRODUCTION:Culture-independent studies have revealed a broad spectrum of oral bacterial taxa that may be associated with disease. This study investigated the prevalence of three new candidate oral pathogens: Prevotella baroniae, Prevotella multisaccharivorax, and as-yet-uncultivated Bacteroidetes oral clone X083 in p...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Rôças IN,Siqueira JF Jr

    更新日期:2009-10-01 00:00:00

  • Kinetic study of immunohistochemical colocalization of antigen-presenting cells and nerve fibers in rat periapical lesions.

    abstract::Immune and nervous systems play key roles in periapical pathosis; however, their spatial associations, which may be a prerequisite for paracrine interactions in the progression of periapical lesions, remain to be examined. In this study we examined the distribution and frequency of spatial associations between major h...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Yang G,Kawashima N,Kaneko T,Suzuki N,Okiji T,Suda H

    更新日期:2007-02-01 00:00:00

  • Initial in vitro biological response to contemporary endodontic sealers.

    abstract::The objective of this study was to evaluate the cytotoxicity of three endodontic sealers (AH Plus/Maillefer-Dentsply, Epiphany/Pentron, GuttaFlow, Coltene-Whaledent). Materials were mixed according to the manufacturer instructions and packed into Teflon molds (10 x 1 mm). For cytotoxicity testing (MTT method), the spe...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Bouillaguet S,Wataha JC,Tay FR,Brackett MG,Lockwood PE

    更新日期:2006-10-01 00:00:00

  • Minimization of Tooth Substance Removal in Normally Calcified Teeth Using Guided Endodontics: An In Vitro Pilot Study.

    abstract:INTRODUCTION:This study evaluated the success rate of and tooth substance removal required for computer-guided preparation of endodontic access cavities. METHODS:Thirty acrylic typodont teeth with root canals (10 each of tooth numbers 11, 14, and 17) were randomly allocated to a study or control group (15 teeth per gr...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Kostunov J,Rammelsberg P,Klotz AL,Zenthöfer A,Schwindling FS

    更新日期:2021-02-01 00:00:00

  • Influence of fiber-post translucency on the degree of conversion of a dual-cured resin cement.

    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


    authors: Faria e Silva AL,Arias VG,Soares LE,Martin AA,Martins LR

    更新日期:2007-03-01 00:00:00

  • The deterioration of rotary nickel-titanium files under controlled conditions.

    abstract::It has been shown that rotary nickel-titanium files cannot be used indefinitely. Researchers and clinicians have not been able to agree on how many times a file can be used before being discarded, except if a file has fractured or become visibly distorted. This study used ISO size 20 files of 0.04 taper in the curved ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Svec TA,Powers JM

    更新日期:2002-02-01 00:00:00

  • A comparison of canal centering ability of four instrumentation techniques.

    abstract::The purpose of this study was to compare three engine driven (nickel-titanium) NiTi instrument systems with hand files for their effect on canal transportation. Mesial roots of mature lower first molars with separate canals were paired on the basis of curvature and morphology. Canal lengths were standardized to 11 mm ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Short JA,Morgan LA,Baumgartner JC

    更新日期:1997-08-01 00:00:00

  • Relationship of radiologic and histologic signs of inflammation in human root-filled teeth.

    abstract::The aim of this study was to determine the relationship between histologic and radiologic signs of inflammation in human root-filled teeth. In addition, other factors with possible importance for apical inflammation were assessed. Fifty-three block sections of root-filled teeth were gathered from human cadavers. The b...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Barthel CR,Zimmer S,Trope M

    更新日期:2004-02-01 00:00:00

  • Assessment of Apical Extrusion during Root Canal Irrigation with the Novel GentleWave System in a Simulated Apical Environment.

    abstract:INTRODUCTION:This study assessed apical extrusion during treatment with GentleWave (GW; Sonendo Inc, Laguna Hills, CA), a conventional open-ended 30-G needle (CN), or Endovac (EV; SybronEndo, Orange, CA) in root canals enlarged to different dimensions with and without apical constriction. METHODS:Sixteen mandibular mo...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Charara K,Friedman S,Sherman A,Kishen A,Malkhassian G,Khakpour M,Basrani B

    更新日期:2016-01-01 00:00:00

  • Removal of Calcium Hydroxide from Artificial Grooves in Straight Root Canals: Sonic Activation Using EDDY Versus Passive Ultrasonic Irrigation and XPendo Finisher.

    abstract:INTRODUCTION:The aim of the present study was to compare sonic activation using EDDY (VDW, Munich, Germany), passive ultrasonic irrigation (PUI), and mechanical activation using the XPendo Finisher (FKG Dentaire, La Chaux-des-Fonds, Switzerland) for the removal of calcium hydroxide from artificial grooves in straight r...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Donnermeyer D,Wyrsch H,Bürklein S,Schäfer E

    更新日期:2019-03-01 00:00:00

  • Bacterial removal promoted by 2 single-file systems: Wave One and One Shape.

    abstract:INTRODUCTION:Different single-file systems are available for endodontic treatment; however, comparative studies are scarce. Thus, the present study evaluated bacterial reduction promoted by 2 single-file systems: Wave One (Dentsply Maillefer, Ballaigues, Switzerland) and One Shape (Micromega, Besancon, France). METHOD...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Nabeshima CK,Caballero-Flores H,Cai S,Aranguren J,Borges Britto ML,Machado ME

    更新日期:2014-12-01 00:00:00

  • Porphyromonas (Bacteroides) endodontalis: its role in endodontal infections.

    abstract::Porphyromonas endodontalis (formerly Bacteroides endodontalis) is a black-pigmented anaerobic Gram-negative rod which is associated with endodontal infections. It has been isolated from infected dental root canals and submucous abscesses of endodontal origin. The presence of P. endodontalis in infected dental root can...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: van Winkelhoff AJ,van Steenbergen TJ,de Graaff J

    更新日期:1992-09-01 00:00:00

  • KLF4 promotes the odontoblastic differentiation of human dental pulp cells.

    abstract:INTRODUCTION:Krüppel-like factor 4 (KLF4) plays an important role in cytodifferentiation and proliferation. Our previous study showed that KLF4 was specifically expressed in polarizing and elongating odontoblasts. However, the role of KLF4 in odontoblast differentiation was still unknown. The purpose of this study was ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Lin H,Xu L,Liu H,Sun Q,Chen Z,Yuan G,Chen Z

    更新日期:2011-07-01 00:00:00

  • Evaluation of the Raypex 5 and the Mini Apex Locator: an in vivo study.

    abstract:INTRODUCTION:The purpose of this study was to compare the accuracy in vivo of 2 electronic apex locators (EALs), the Raypex 5 and the Mini Apex Locator. METHODS:The working length (WL) was determined electronically for 40 human root canals by using a K-file and 1 of the 2 EALs. The files were fixed at the WL, and the ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Stöber EK,de Ribot J,Mercadé M,Vera J,Bueno R,Roig M,Duran-Sindreu F

    更新日期:2011-10-01 00:00:00

  • Lysyl oxidase and the lysyl oxidase-like protein modulate odontoblastic differentiation of human dental pulp cells.

    abstract:INTRODUCTION:The lysyl oxidase (LOX) family is an emerging family of amine oxidases responsible for the formation of collagen fibrils in the extracellular matrix. To date, 5 LOX family genes have been identified in humans, encoding LOX and LOX-like proteins (LOXL, LOXL2, LOXL3, and LOXL4). The goal of this study was to...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Kim EC,Lee HJ,Kim Y

    更新日期:2012-06-01 00:00:00

  • Behavior of nickel-titanium instruments manufactured with different thermal treatments.

    abstract:INTRODUCTION:The purpose of this study was to investigate if nickel-titanium instruments with similar designs manufactured by different thermal treatments would exhibit significantly different in vitro behavior. METHODS:Thirty-six instruments each of ProTaper Universal (PTU F1; Dentsply Maillefer, Ballaigues, Switzerl...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Pereira ÉS,Viana AC,Buono VT,Peters OA,Bahia MG

    更新日期:2015-01-01 00:00:00

  • Relationship between postendodontic pain, tooth diagnostic factors, and apical patency.

    abstract::This study compares the incidence, degree, and length of postoperative pain in 300 endodontically treated teeth, with and without apical patency, in relation to some diagnostic factors (vitality, presence of preoperative pain, group, and mandible of treated tooth). Of the questionnaires received back, apical patency w...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Arias A,Azabal M,Hidalgo JJ,de la Macorra JC

    更新日期:2009-02-01 00:00:00

  • Effect of masticatory cycles on tooth compression and resultant leakage of amalgam retrofills.

    abstract::This study was carried out to investigate the effect of changes in tooth structure due to masticatory cycles on amalgam retrofillings performed to different cavity depths. Forty upper maxillary first molars were tested. In the obturated palatal root apical amalgam was inserted to different depths (1.5 and 3 mm). Eight...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Blum JY,Esber S,Parahy E,Franquin JC

    更新日期:1997-10-01 00:00:00

  • An in vitro comparison of microleakage of restorative materials in the pulp chambers of human molar teeth.

    abstract::Ninety-six human molars were accessed. After flattening of the occlusal surface and removal of the apical two-thirds of the roots, the remaining canal space was instrumented by conventional methods. The teeth were divided into six groups of 15 teeth with three positive and three negative controls. The six experimental...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Carman JE,Wallace JA

    更新日期:1994-12-01 00:00:00

  • The Expression of Interferon Regulatory Factor 8 in Human Periapical Lesions.

    abstract:INTRODUCTION:Interferon regulatory factor 8 (IRF8) is a critical transcription factor in innate immune responses that regulates the development and function of myeloid cells. Human periapical lesions are caused by endodontic microbial infections. However, the presence of IRF8 in human periapical lesions remains elusive...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Yu J,Liu M,Zhu L,Zhu S,Lv F,Wang Y,Wang L,Peng B

    更新日期:2018-08-01 00:00:00

  • Appropriate electrode placement site for electric pulp testing first molar teeth.

    abstract::Twenty volunteers with first molars free of restorations and caries were recruited. One molar from each arch was selected, and rubber dam was applied. Seven sites on each crown were electric pulp tested 4 times with an Elements Diagnostic Unit, and lowest threshold responses were recorded. Data were analyzed with one-...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Lin J,Chandler N,Purton D,Monteith B

    更新日期:2007-11-01 00:00:00

  • Evaluation of the apical condensation of gutta-percha by a tapered/calibrated spreader/plugger.

    abstract::This study compared a tapered, calibrated spreader/plugger instrument (M-series) to noncalibrated spreaders and pluggers in achieving apical condensation of gutta-percha in 20 single-rooted human teeth. The distances between the tip of the instruments and the tip of the master gutta-percha were measured. Results showe...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Chohayeb AA

    更新日期:1993-04-01 00:00:00