Abstract:
INTRODUCTION:The aim of this study was to compare the shaping ability of 4 different nickel-titanium systems, considering their variation in alloy treatment, kinematics, and design, used to prepare canals with severe curvature using micro-computed tomographic analysis. METHODS:Thirty-two mesial roots of mandibular molars with severe curvature were matched based on similar morphologic dimensions and assigned to 4 experimental groups (n = 8) according to the canal preparation: ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland), Reciproc (RC; VDW GmbH, Munich, Germany), Reciproc Blue (RCB, VDW GmbH), and TRUShape (TRU; Dentsply Tulsa Dental Specialties, Tulsa, OK) systems. Changes in 2-dimensional (area and perimeter) and 3-dimensional (volume, surface area, and structure model index) morphologic parameters as well as canal transportation were compared among groups using the analysis of variance post hoc Tukey tests with the significance level set at 5%. RESULTS:Preparation significantly increased all analyzed parameters. No statistically significant differences (P > .05) were observed between RC and RCB or between PTN and TRS in any of the analyzed parameters. In the cervical third, RC and RCB presented higher mean increases than PTN and TRU. In the apical third, there were no statistically significant differences (P > .05) among the systems. CONCLUSIONS:The instruments of greater taper may promote greater morphologic changes. However, regardless of the number of instruments (multiple or single), the type of movement (rotation or reciprocating), the type of heat treatment of alloys, and the particular characteristics of each instrument (taper and design), the evaluated systems did not result in different dimensional changes and canal transportation in the critical apical area.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Filizola de Oliveira DJ,Leoni GB,da Silva Goulart R,Sousa-Neto MD,Silva Sousa YTC,Silva RGdoi
10.1016/j.joen.2019.02.018subject
Has Abstractpub_date
2019-06-01 00:00:00pages
768-773issue
6eissn
0099-2399issn
1878-3554pii
S0099-2399(19)30127-Xjournal_volume
45pub_type
杂志文章abstract:INTRODUCTION:Difficult handling, long setting time, and potential discoloration are important drawbacks of white mineral trioxide aggregate (WMTA). The development of Biodentine, a recently developed calcium silicate-based material (CSM), has overcome some of these shortcomings; however, there are no available data on ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2012.12.021
更新日期:2013-04-01 00:00:00
abstract::Two electronic apex locators based on the gradient (Apit) and absolute (Odontometer) impedance principles were evaluated. Distances of file tips to apical foramina were determined in vivo with the electronic apex locators and subsequently verified after extraction. Mean differences between file tips and apical foramin...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(06)80145-7
更新日期:1996-05-01 00:00:00
abstract::This study compared the cytotoxicity of MetaSEAL (Parkell Inc, Farmington, NY), a methacrylate resin-based sealer with an epoxy resin-based (AH Plus Jet; Dentsply Caulk, Milford, DE) and a zinc oxide-eugenol-based sealer (Pulp Canal Sealer; SybronEndo, Orange, CA). Five-millimeter diameter disks prepared from the resp...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.06.020
更新日期:2008-09-01 00:00:00
abstract:INTRODUCTION:An evaluation was made of the connective tissue reaction in rats after subcutaneous implantation of methacrylate resin-based sealers (EndoREZ [Ultradent Products, Inc, South Jordan, UT] with a polymerization accelerator and RealSeal [Sybron Dental Specialties, Orange, CA]) and Pulp Canal Sealer (Sybron Den...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2010.06.019
更新日期:2010-09-01 00:00:00
abstract::Atypical odontalgia is characterized by prolonged periods of throbbing or burning pain in the teeth or alveolar process, which occurs in the absence of any identifiable odontogenic etiology. The pain may be bilateral and change in location. This article presents two cases of atypical odontalgia that were misdiagnosed ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(97)80419-0
更新日期:1997-05-01 00:00:00
abstract::Hepatocyte growth factor (HGF) is a potent mitogenic and angiogenic factor involved in the development of many tissues including the teeth. We previously reported that dental pulp cells express the HGF receptor c-met and that HGF can enhance cell proliferation and differentiation. The purpose of this study was to dete...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.11.031
更新日期:2009-03-01 00:00:00
abstract:INTRODUCTION:The purpose of this study was to evaluate the effect of chitosan-hydroxyapatite precursor (C-HA) nanocomplex conditioning on the chemical modifications at the tricalcium silicate sealer-dentin interface using time-of-flight secondary ion mass spectrometry. METHODS:Dentin slabs from human premolar root den...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.08.011
更新日期:2019-12-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to analyze and characterize root canal morphology of mandibular molars of the Brazilian population by using cone-beam computed tomography (CBCT). METHODS:Patients who required CBCT radiographic examinations as part of their routine examination, diagnosis, and treatment planning w...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.04.030
更新日期:2013-07-01 00:00:00
abstract:INTRODUCTION:The inferior alveolar nerve (IAN) block does not always result in successful pulpal anesthesia. Anesthetic success rates might be affected by increased anxiety. Nitrous oxide has been shown to have both anxiolytic and analgesic properties. Therefore, the purpose of this prospective, randomized, double-blin...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2012.02.010
更新日期:2012-05-01 00:00:00
abstract:INTRODUCTION:Alkaline-tolerant bacteria in primary infected root canals could have enhanced survival capacity against antimicrobials commonly used in root canal treatment. The aims of this study were to isolate and characterize alkaline-tolerant bacteria before endodontic treatment (S1), after chemomechanical root cana...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2014.12.003
更新日期:2015-04-01 00:00:00
abstract:INTRODUCTION:Incision and drainage of symptomatic emergency patients with facial swelling is painful even after local anesthetics are administered. The purpose of this prospective, randomized, double-blind study was to compare the pain of infiltration and the pain of an incision and drainage procedure of a buffered ver...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2015.06.017
更新日期:2015-10-01 00:00:00
abstract:INTRODUCTION:Endodontic claims are the most frequently filed malpractice claims in dentistry. The aim of this study was to categorize and review errors and complications related to endodontic procedures that resulted in legal actions against the treating practitioner. METHODS:All dental malpractice complaints reported...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2010.03.030
更新日期:2010-06-01 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::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
doi:10.1016/s0099-2399(06)80843-5
更新日期:1992-09-01 00:00:00
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
doi:10.1016/j.joen.2012.04.007
更新日期:2012-07-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to investigate the number of roots and the morphology of the root canals of maxillary and mandibular premolars in a selected German population. METHODS:Randomly selected full-size cone-beam computed tomographic images were collected from 700 patients (45% men and 55% women, avera...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2017.03.044
更新日期:2017-09-01 00:00:00
abstract::The anatomy of third molars has been described as unpredictable. However restorative, prosthetic, and orthodontic considerations often require endodontic treatment of third molars in order for them to be retained as functional components of the dental arch. The purpose of this study was to investigate and characterize...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200011000-00011
更新日期:2000-11-01 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::Biopsy reports of specimens from the apices of 1659 teeth physically present at the time the biopsy was performed were reviewed. The following information was recorded from each report: (a) source of specimen, (b) sex of patient, (c) age of patient, (d) location of tooth associated with lesion, and (e) diagnoses repor...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1016/s0099-2399(06)81679-1
更新日期:1990-05-01 00:00:00
abstract:INTRODUCTION:Calcium hydroxide (CH) and nano-calcium hydroxide (NCH) as intracanal medicaments may affect the physical and chemical properties of dentin. The aim of this investigation was to evaluate the effects of CH and NCH on the microhardness and superficial chemical structure of radicular dentin. METHODS:In this ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.06.002
更新日期:2019-09-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to compare 2 reciprocating nickel-titanium systems with different manufacturing characteristics and to evaluate the influence of simulated clinical use on their torsional resistance. METHODS:New 25/.08 WaveOne Primary (WO; Dentsply Sirona, York, PA) and 25/.07 WaveOne Gold Primar...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.04.009
更新日期:2019-08-01 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::This in vitro study evaluated the microbial leakage of Cavit, IRM, and Dyract when used as temporary filling materials after root canal treatment. The degree of coronal leakage was assessed by using a microbiological marker consisting of Streptococcus faecalis and Candida albicans. For each of the two organisms, a set...
journal_title:Journal of endodontics
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004770-200211000-00004
更新日期:2002-11-01 00:00:00
abstract::The purpose of this in vitro study was to investigate the canal configuration types, and the prevalence and location of anatomical variations in the mesiobuccal (MB) and mesial roots of permanent maxillary and mandibular first molars after instrumentation. The number and the type of canals were determined before instr...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/01.don.0000145425.73364.91
更新日期:2005-05-01 00:00:00
abstract:INTRODUCTION:The purpose of this study was to evaluate and compare the volume of removed dentin, transportation, and centering ability of ProTaper Next (PTN) system with and without glide path preparation by using cone-beam computed tomography (CBCT) imaging. METHODS:Sixty mesiobuccal canals of mandibular first molars...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2014.09.001
更新日期:2014-12-01 00:00:00
abstract:INTRODUCTION:This 2-part study hypothesized that a bioactive scaffold containing a sustained transforming growth factor (TGF)-β1-releasing nanoparticle system will promote migration and enhance differentiation of stem cells from the apical papilla (SCAP). The study aimed to develop and characterize a novel modified chi...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.06.017
更新日期:2016-09-01 00:00:00
abstract::Many root canal instruments with several different designs have been introduced during recent years. This article evaluates the machining properties of four such instruments: the Flex-R, K-Flex, Trio-Cut, and S file. There are large variations in the machining properties of these instruments. The results are comparabl...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(07)80200-7
更新日期:1990-12-01 00:00:00
abstract::Propolis, a flavonoid-rich product of honey comb, exhibits antibacterial and anti-inflammatory properties. In this study, we examined the tolerance of fibroblasts of the periodontal ligament (PDL) and dental pulp to propolis and compared with that of calcium hydroxide in vitro. Cells from human dental pulp and PDL wer...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200405000-00012
更新日期:2004-05-01 00:00:00
abstract:INTRODUCTION:Studies have found women try to avoid pain more than men, accept it less, and fear it more. The role of operator gender on subject gender pain in a clinical setting needs further study. The purpose of this randomized, double-blind investigation was to evaluate operator gender and its influence on reported ...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2014.10.001
更新日期:2015-02-01 00:00:00
abstract::The purpose of this in vitro study was to evaluate quantitatively the ability of four different filling materials to seal the orifices of root canals as a secondary seal after root canal therapy. Forty extracted human molar teeth were used. The top of pulp chambers and distal halves of the roots were removed using an ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200108000-00006
更新日期:2001-08-01 00:00:00