Cross-sectional configuration of endodontic files compared with manufacturers' design.


:The cross-sectional configuration of seven files at coronal and apical levels were compared with diagrams presented by manufacturers. The presence of cutting edges was also examined. Ground-twisted (K-file, K-Reamer, and K-flex) and machined files (Flex-R, Unifile, S-file, and Hedstrom) were included in #10, #25, and #40. Twelve files of each size and brand comprised the samples. Files were embedded in acrylic, which was then cut in cross-section in the apical and coronal parts of the flutes. These were photographed under a microscope. Six clinicians viewed the slides projected onto a screen for comparison with manufacturers' design and evaluation of visible cutting edges. The inconsistencies were primarily in machined files, smaller sizes, and apical sections of the instruments. Data showed that overall the cross-sections and presence of cutting edges compared well with the designs intended by the manufacturers.


J Endod


Journal of endodontics


D'Souza JE,Walton RE,Maixner D




Has Abstract


1995-12-01 00:00:00














  • Comparative Expression of CD34, Intercellular Adhesion Molecule-1, and Podoplanin and the Presence of Mast Cells in Periapical Granulomas, Cysts, and Residual Cysts.

    abstract:INTRODUCTION:The aim of the present study was to compare the immunoexpression of CD34, intercellular adhesion molecule-1 (ICAM-1), and podoplanin and the presence of mast cells with clinical, demographic, radiologic, and histologic features from periapical granulomas, periapical cysts, and residual cysts. METHODS:Thir...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Lopes CB,Armada L,Pires FR

    更新日期:2018-07-01 00:00:00

  • Biomimetic Conditioning of Human Dentin Using Citric Acid.

    abstract:INTRODUCTION:In carious teeth, transforming growth factor beta 1 (TGF-β1) is released from the dentin matrix and possibly activated in an acidic environment. Conversely, EDTA solutions with a neutral to slightly alkaline pH are used in clinics to promote cell homing in regenerative endodontic procedures. We hypothesize...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Ivica A,Zehnder M,Mateos JM,Ghayor C,Weber FE

    更新日期:2019-01-01 00:00:00

  • Recombinant Amelogenin Protein Induces Apical Closure and Pulp Regeneration in Open-apex, Nonvital Permanent Canine Teeth.

    abstract:INTRODUCTION:Recombinant DNA-produced amelogenin protein was compared with calcium hydroxide in a study of immature apex closure conducted in 24 young mongrel dogs. METHODS:Root canals of maxillary and mandibular right premolars (n = 240) were instrumented and left open for 14 days. Canals were cleansed, irrigated, an...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Mounir MM,Matar MA,Lei Y,Snead ML

    更新日期:2016-03-01 00:00:00

  • A Comparison of Different Volumes of Articaine for Inferior Alveolar Nerve Block for Molar Teeth with Symptomatic Irreversible Pulpitis.

    abstract:INTRODUCTION:Achieving anesthesia in mandibular molar teeth with irreversible pulpitis is very difficult. The aim of this study was to compare the efficacy of 1.8 mL and 3.6 mL articaine for an inferior alveolar nerve block (IANB) when treating molars with symptomatic irreversible pulpitis. METHODS:In a randomized, do...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Abazarpoor R,Parirokh M,Nakhaee N,Abbott PV

    更新日期:2015-09-01 00:00:00

  • Emergency pulpotomy: pain relieving effect with and without the use of sedative dressings.

    abstract::Seventy-three teeth with acute irreversible pulpitis were subjected to emergency pulpotomies. After removal of the coronal portion of the pulp, a sterile cotton pellet or zinc oxide-eugenol cement was placed against the remaining pulp tissue. The cotton pellet was either dry or moistened with camphorated phenol, cresa...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Hasselgren G,Reit C

    更新日期:1989-06-01 00:00:00

  • Glucose Transporter 2 and 4 Are Involved in Glucose Supply during Pulpal Wound Healing after Pulpotomy with Mineral Trioxide Aggregate in Rat Molars.

    abstract:INTRODUCTION:Pulp capping materials allow healing of injured pulp with a layer of reparative dentin. Glucose is needed to cure the injured area. Glucose is transported by glucose transporter (Glut) 2 and Glut4, which are transmembrane proteins that act as gatekeepers. We hypothesized that the transport of glucose via G...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Tohma A,Ohkura N,Yoshiba K,Takeuchi R,Yoshiba N,Edanami N,Shirakashi M,Ibn Belal RS,Ohshima H,Noiri Y

    更新日期:2020-01-01 00:00:00

  • Apical sealing ability of glass ionomer sealer with and without smear layer.

    abstract::The effect of two different root canal cements and removal of the smear layer on the apical seal in roots obturated with Thermafil obturators was tested. Thirty extracted human mandibular first molars with 60 canals (mesial roots) were instrumented with the use of a step-back technique. Teeth were placed into 6 groups...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Timpawat S,Sripanaratanakul S

    更新日期:1998-05-01 00:00:00

  • Conventional and surgical treatment of a two-rooted maxillary central incisor.

    abstract::Conventional and surgical endodontic management were performed on a two-rooted maxillary central incisor with a periapical lesion. Anatomical complexity of the tooth lead to perforation in the distal root during conventional treatment, thus a surgical approach was taken. A 4-month postoperative radiograph shows repair...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: González-Plata-R R,González-Plata-E W

    更新日期:2003-06-01 00:00:00

  • Outcomes of Direct Pulp Capping by Using Either ProRoot Mineral Trioxide Aggregate or Biodentine in Permanent Teeth with Carious Pulp Exposure in 6- to 18-Year-Old Patients: A Randomized Controlled Trial.

    abstract:INTRODUCTION:This study aimed to compare the success rates of direct pulp capping (DPC) by using either ProRoot Mineral Trioxide Aggregate (MTA) or Biodentine in the cariously exposed permanent teeth of 6- to 18-year-old patients. Gray discoloration was also evaluated. METHODS:Fifty-nine cariously exposed permanent te...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Parinyaprom N,Nirunsittirat A,Chuveera P,Na Lampang S,Srisuwan T,Sastraruji T,Bua-On P,Simprasert S,Khoipanich I,Sutharaphan T,Theppimarn S,Ue-Srichai N,Tangtrakooljaroen W,Chompu-Inwai P

    更新日期:2018-03-01 00:00:00

  • Changes in Geometry and Transportation of Root Canals with Severe Curvature Prepared by Different Heat-treated Nickel-titanium Instruments: A Micro-computed Tomographic Study.

    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 mol...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Filizola de Oliveira DJ,Leoni GB,da Silva Goulart R,Sousa-Neto MD,Silva Sousa YTC,Silva RG

    更新日期:2019-06-01 00:00:00

  • A Novel Approach to Fracture Resistance Using Horizontal Posts after Endodontic Therapy: A Case Report and Review of Literature.

    abstract::Studies of endodontic outcomes suggest that fracture of the tooth after endodontic therapy may be a greater problem than endodontic reinfection. Immediate full coverage with or without a post and core is the best way to prevent fracture. Unfortunately, in many population areas, due predominantly to cost, this restorat...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,评审


    authors: Kim SG,Kim SS,Levine JL,Piracha YS,Solomon CS

    更新日期:2020-04-01 00:00:00

  • The effect of formalin storage on the apical microleakage of obturated canals.

    abstract::Infection control guidelines recommend disinfection of extracted teeth in 10% formalin for 2 weeks before use. Although extracted teeth are routinely used for in vitro endodontic research, the potential influence of formalin has not been evaluated. The purpose of this study was to investigate the effect of formalin st...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: George SW,Pichardo MR,Bergeron BE,Jeansonne BG

    更新日期:2006-09-01 00:00:00

  • Influence of Atopy in the Outcome of Avulsed and Replanted Teeth during 5 Years of Follow-up.

    abstract:INTRODUCTION:The goal of replantation after dental avulsion is to maintain the tooth in its socket. Presence of vital periodontal ligament cells on the root surface of the replanted tooth and the immunologic status of the patient are factors that protect against root resorption. It is known that dental constituents pla...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Roskamp L,Silva Neto UX,Carneiro E,Fariniuk LF,Westphalen VP

    更新日期:2017-01-01 00:00:00

  • Antimicrobial Efficacy of Chlorhexidine and Sodium Hypochlorite in Root Canal Disinfection: A Systematic Review and Meta-analysis of Randomized Controlled Trials.

    abstract:INTRODUCTION:We aimed to compare the antimicrobial efficacy of chlorhexidine (CHX) and sodium hypochlorite (NaOCl), 2 irrigants routinely used in root canal therapy of permanent teeth. METHODS:Electronic databases, including PubMed, EMBASE, Web of Science, and Cochrane Library, were searched for randomized controlled ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,meta分析


    authors: Ruksakiet K,Hanák L,Farkas N,Hegyi P,Sadaeng W,Czumbel LM,Sang-Ngoen T,Garami A,Mikó A,Varga G,Lohinai Z

    更新日期:2020-08-01 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

  • A comparison of thermoplasticized injectable gutta-percha obturation techniques.

    abstract::This study compared the quality of obturation of high- and low-temperature thermoplasticized injectable gutta-percha techniques and standard lateral condensation. A new model system was developed to more closely simulate the clinical environment. All obturations were performed in this same model which allowed direct c...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Budd CS,Weller RN,Kulild JC

    更新日期:1991-06-01 00:00:00

  • Osseointegration treatment of transverse root fractures in the region of the alveolar crest.

    abstract::A method of using osseointegrated implants as an alternative treatment modality for transverse root fractures near the osseous crest is presented. A 15-mm Branemark implant was placed immediately after extraction of a maxillary central incisor with transverse root fracture. Five months after stage I surgery, the impla...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Hernandez RE,Balshi TJ

    更新日期:1998-02-01 00:00:00

  • Extraoral sinus tract misdiagnosed as an endodontic lesion.

    abstract::The extraoral sinus tract may occur as a result of an inflammatory process associated with a necrotic pulp. However, several non-odontogenic disorders may also produce an extraoral sinus tract. Thus, the differential diagnosis of this clinical finding is of paramount importance in providing appropriate clinical care b...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Cohenca N,Karni S,Rotstein I

    更新日期:2003-12-01 00:00:00

  • Evaluation of a dentin barrier test by cyctotoxicity testing of various dental cements.

    abstract::In this study, cell reaction after exposure to several dental cements was determined using a dentin barrier test device. The reaction of mouse fibroblasts grown on the "pulpal" side of a bovine dentin disk was determined after exposure to dental cements applied on the "cavity" side of the disk. For pretreatment, denti...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Schmalz G,Schweikl H,Esch J,Hiller KA

    更新日期:1996-03-01 00:00:00

  • Diabetes mellitus and the dental pulp.

    abstract::This study attempts to evaluate the oral manifestations of and the limited available dental pulp information on diabetes mellitus, a common metabolic disorder of carbohydrate and lipid metabolism affecting over 16 million Americans. Diabetics are particularly prone to bacterial or opportunistic infections. This vulner...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,评审


    authors: Bender IB,Bender AB

    更新日期:2003-06-01 00:00:00

  • Regenerative Endodontics: Burning Questions.

    abstract::Pulp regeneration and its clinical translation into regenerative endodontic procedures are receiving increasing research attention, leading to significant growth of the published scientific and clinical literature within these areas. Development of research strategies, which consider patient-, clinician-, and scientis...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Smith AJ,Cooper PR

    更新日期:2017-09-01 00:00:00

  • Evaluation of pH and calcium ion release of calcium hydroxide pastes containing different substances.

    abstract:INTRODUCTION:The objective of this study was to evaluate the pH and calcium ion release of calcium hydroxide pastes associated with different substances. METHODS:Forty acrylic teeth with simulated root canals were divided into 4 groups according to the substance associated to the calcium hydroxide paste: chlorhexidine...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Duarte MA,Midena RZ,Zeferino MA,Vivan RR,Weckwerth PH,Dos Santos F,Guerreiro-Tanomaru JM,Tanomaru-Filho M

    更新日期:2009-09-01 00:00:00

  • Proximity of Vascular Bone Channel in the Lateral Sinus Wall to Root Apices of Maxillary First Molars: A Cone-beam Computed Tomographic Analysis.

    abstract:INTRODUCTION:Apical surgery is frequently indicated in maxillary first molars. Occasionally, a vascular anastomosis in the lateral maxillary sinus wall can be observed during surgery. The aim of this study was to examine the distance between the vascular bone channel (VBC) and the root apices of maxillary first molars ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Bischof FM,Bornstein MM,Suter VGA,Lello RIE,von Arx T

    更新日期:2019-12-01 00:00:00

  • Reversal of pulpal and soft tissue anesthesia by using phentolamine: a prospective randomized, single-blind study.

    abstract:INTRODUCTION:Phentolamine mesylate has been reported to be an effective local anesthetic reversal agent for soft tissue but has not been studied regarding reversal of pulpal anesthesia. The authors conducted a prospective randomized, single-blind study comparing the reversal of pulpal and soft tissue anesthesia when ph...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


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

    更新日期:2013-04-01 00:00:00

  • A comparison of intracanal stresses in a post-restored tooth utilizing the finite element method.

    abstract::The finite element method was used to compare stresses along the inner canal wall in four two-dimensional models of an average maxillary central incisor. The four models evaluated were an intact incisor, an endodontically treated incisor, an endodontically treated crown-restored incisor, and a cylindrical post and cro...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Cailleteau JG,Rieger MR,Akin JE

    更新日期:1992-11-01 00:00:00

  • Pulp tissue reactions to a dentin bonding agent as a direct capping agent.

    abstract::The aim of this study was to investigate the response of human pulp tissue to a dentin bonding agent, Scotchbond Multi-Purpose Plus (SMPP), in exposed class V cavities. Sixteen human premolar teeth were mechanically exposed. Ten pulps were capped with SMPP and six teeth were capped with Dycal. The cavities were filled...

    journal_title:Journal of endodontics

    pub_type: 临床试验,杂志文章


    authors: Sübay RK,Demirci M

    更新日期:2005-03-01 00:00:00

  • Cytotoxic evaluation of root canal filling materials on primary human oral fibroblast cultures and a permanent hamster cell line.

    abstract::To date there has been very little data on the cytotoxic response of different cell lines to root canal sealers. The objective of this study was to determine the cytocompatibility of three different extracts of root canal sealers and to compare the cytotoxic response of these materials on two different primary human o...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Tai KW,Huang FM,Chang YC

    更新日期:2001-09-01 00:00:00

  • Redemption of a perforated furcation with a multidisciplinary treatment approach.

    abstract::A long-standing lesion associated with an undetected perforation of the furca in a mandibular molar was successfully managed using a multidisciplinary treatment approach. The sequence of therapeutic procedures involved conventional endodontic retreatment, an initial orthograde sealing of the perforation, guided tissue...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Goon WW,Lundergan WP

    更新日期:1995-11-01 00:00:00

  • Investigation on the shaping ability of nickel-titanium files when used with a reciprocating motion.

    abstract:INTRODUCTION:The introduction of nickel-titanium (NiTi) files into clinical practice has improved the quality of canal shaping, but increasing the curvature of the root canal (or the diameter of the master instrument that prepares the full working length) could result in more transportation, straightening, and aberrati...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Franco V,Fabiani C,Taschieri S,Malentacca A,Bortolin M,Del Fabbro M

    更新日期:2011-10-01 00:00:00

  • Effect of surface treatments on tensile bond strength and on morphology of quartz-fiber posts.

    abstract::This study evaluated the effect of three post surface treatments on quartz-fiber post (a) retention and (b) morphology. A control group was not treated. Different treatments were performed for the other posts: silanization; etching by hydrofluoric acid 9.5%; sandblasting with 50 microm Al2O3. Two specimens of each gro...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: D'Arcangelo C,D'Amario M,Prosperi GD,Cinelli M,Giannoni M,Caputi S

    更新日期:2007-03-01 00:00:00