abstract：:The purpose of this study was to quantify the amount of remaining gutta-percha/sealer after retreatment of post space prepared teeth obturated with a lateral condensation technique or with Thermafil with plastic and metallic carrier. The time required for retreatment was also recorded. Forty-five extracted mandibular ...

journal_title：Journal of endodontics

authors： Zuolo ML,Imura N,Ferreira MO

更新日期：1994-01-01 00:00:00

abstract：:Amalgam, IRM, and a mineral trioxide aggregate were tested for repair of experimentally created root perforations. Fifty sound, extracted mandibular and maxillary molars were used in this study. A perforation was created on the mesial root surface at about a 45-degree angle to the long axis of each tooth. The tooth wa...

journal_title：Journal of endodontics

authors： Lee SJ,Monsef M,Torabinejad M

更新日期：1993-11-01 00:00:00

abstract：:This article describes how to construct and use a simplified model to demonstrate the operation of electronic root canal measuring devices. The model is effective, more economical than those previously described, and uses readily available materials. ...

journal_title：Journal of endodontics

authors： Donnelly JC

更新日期：1993-11-01 00:00:00

abstract：:The endodontic endosseous implant (EEI) enjoyed wide use in the United States after it was introduced in the 1960's. For various reasons including incorrect case selection, improper use of the materials, and poor preparation for the implant a high number of failures resulted. Following opposition by some members of th...

journal_title：Journal of endodontics

authors： Weine FS,Frank AL

更新日期：1993-10-01 00:00:00

abstract：:A laboratory study was performed on Gates Glidden and Peeso drills to determine the bending characteristics and related metallurgical properties. Sizes #1 to #6 stainless steel Gates Glidden drills, sizes #1 to #6 stainless steel and carbon steel type P Peeso drills, and sizes #009 to #023 carbon steel-type B-1 Peeso ...

journal_title：Journal of endodontics

authors： Lausten LL,Luebke NH,Brantley WA

更新日期：1993-09-01 00:00:00

abstract：:The purpose of this study was to evaluate the durability of insulated probes designed to be used with the Endocater Apex Locator when put through multiple cleaning and autoclaving cycles. The manufacturer has reported that the plastic coating on the probes is reliable with normal use and sterilizable up to a maximum o...

journal_title：Journal of endodontics

authors： Himel VT,Schott RN

更新日期：1993-08-01 00:00:00

abstract：:This study was conducted to evaluate the influence of immediate versus delayed immersion time, and passive dye immersion versus centrifuged dye on apical leakage measurements. Eighty-four extracted human teeth with single straight canals were instrumented and divided into four experimental groups of 20 teeth each plus...

journal_title：Journal of endodontics

authors： Karagöz-Küçükay I,Küçükay S,Bayirli G

更新日期：1993-07-01 00:00:00

abstract：:The persistent presence of bacteria in the root canal system often leads to the failure of treatment. The aim of this study was to study the in vitro penetration of root dentinal tubules by bacteria. Bovine dentin was inoculated with a strain of Streptococcus sanguis, NCTC 7863; samples were taken at 10, 20, and 28 da...

journal_title：Journal of endodontics

authors： Perez F,Calas P,de Falguerolles A,Maurette A

更新日期：1993-06-01 00:00:00

abstract：:A method is proposed for a three-dimensional visualization of the root canal system before and after the cleaning and shaping procedure to analyze the relationships of the root canal walls. The first part of the study provided cross-sections of the root perpendicular to the root canal. A system for remounting the sect...

journal_title：Journal of endodontics

authors： Berutti E

更新日期：1993-05-01 00:00:00

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

authors： Chohayeb AA

更新日期：1993-04-01 00:00:00

abstract：:A previous study showed that the ferret canine is an appropriate model for inducing periapical lesions. Ferret canines were used in this study to study changes in periapical lesions after root canal treatment (RCT). After periapical pathosis was induced in the maxillary and mandibular canines of six ferrets, RCT was p...

journal_title：Journal of endodontics

authors： Fouad AF,Walton RE,Rittman BR

更新日期：1993-03-01 00:00:00

abstract：:Apical periodontitis and its concomitant periapical osteolysis is caused by pulpal infection, and bacterial lipopolysaccharide (LPS) is known to play a major role in the bone resorption process. Little is known concerning the effect of root canal intervisit dressings on residual LPS in root canals after bacterial cell...

journal_title：Journal of endodontics

authors： Safavi KE,Nichols FC

更新日期：1993-02-01 00:00:00

abstract：:Orthodontic tooth movement has been implicated in secondary changes to the dental pulp. The purpose of this study was to correlate the effects of orthodontic tooth movement on the dental pulp by histomorphometric parameters. Four groups, each consisting of 36 male adult Sprague-Dawley strain rats, were studied with di...

journal_title：Journal of endodontics

authors： Nixon CE,Saviano JA,King GJ,Keeling SD

更新日期：1993-01-01 00:00:00

abstract：:Sodium hypochlorite (NaOCl) has been recommended for irrigation during root canal preparation. This investigation used scanning electron microscopy to examine instrumented and uninstrumented surfaces in the middle third of root canals following the use of several concentrations of NaOCl (5.25%, 2.5%, 1.0%, and 0.5%). ...

journal_title：Journal of endodontics

authors： Baumgartner JC,Cuenin PR

更新日期：1992-12-01 00:00:00

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

authors： Cailleteau JG,Rieger MR,Akin JE

更新日期：1992-11-01 00:00:00

abstract：:Cyanoacrylate is an extremely strong bonding agent which has many applications in medicine. It is also effective in obtaining a leakproof seal of rubber dam around a structurally compromised tooth requiring endodontic therapy. ...

journal_title：Journal of endodontics

authors： Roahen JO,Lento CA

更新日期：1992-10-01 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

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

更新日期：1992-09-01 00:00:00

abstract：:Ten extracted human maxillary first molars were selected with a variety of root curvatures. The distofacial roots were resected and the mesiofacial canals were instrumented to a size #25 K file. Three techniques were used to introduce Ca(OH)2 paste into the instrumented canals. These techniques were evaluated for thei...

journal_title：Journal of endodontics

authors： Sigurdsson A,Stancill R,Madison S

更新日期：1992-08-01 00:00:00

abstract：:A case study is presented that described an acute flare-up of a tooth following a vital bleaching procedure. The case illustrates (a) the importance of assessing the pulpal and periradicular status of a tooth prior to any vital bleaching procedure; and (b) the alteration of the local adaptation syndrome by the bleachi...

journal_title：Journal of endodontics

authors： Glickman GN,Frysh H,Baker FL

更新日期：1992-07-01 00:00:00

abstract：:Patients with odontogenic cutaneous sinus tracts usually seek treatment from a physician instead of a dentist and the etiology is frequently misdiagnosed. This case report describes a patient who sought treatment from a dentist because of a history of a previous cutaneous swelling on the ipsilateral side of his cheek....

journal_title：Journal of endodontics

authors： Foster KH,Primack PD,Kulild JC

更新日期：1992-06-01 00:00:00

abstract：:With the recent influx of osseointegrated endosseous implants in dentistry, attention has been drawn away from using endodontic stabilizers as a means of stabilizing and retaining teeth. It is our opinion that endodontic stabilizers should be considered in the treatment planning of seemingly nonretainable teeth. They ...

journal_title：Journal of endodontics

authors： Feldman M,Feldman G

更新日期：1992-05-01 00:00:00

abstract：:A lack of agreement exists in the literature regarding the anatomical relationship of the mandibular canal to its surrounding structures such as the root apices. The purpose of this investigation was to study the spatial relationship of the mandibular canal to the posterior teeth in dried human mandibles. Twenty-two m...

journal_title：Journal of endodontics

authors： Denio D,Torabinejad M,Bakland LK

更新日期：1992-04-01 00:00:00

abstract：:The cytotoxicity of four different calcium hydroxide-based root canal sealers (Sealapex, Apexit, CRCS, and Endoflas FS) was tested using human gingiva fibroblasts. The fibroblasts were acquired from the attached gingiva of apparently healthy patients. The sealers were allowed to set for 24 and 48 h before being covere...

journal_title：Journal of endodontics

authors： Briseño BM,Willershausen B

更新日期：1992-03-01 00:00:00

abstract：:Adsorption of some paraformaldehyde was noted in a previous study evaluating its sterilizing effect on gutta-percha (GP). This study examined histologically the effect of this adsorption when formaldehyde-exposed GP was implanted into the subcutaneous connective tissue of rats. GP implants were prepared in cylinder sh...

journal_title：Journal of endodontics

authors： Cleary PT,Newton CW,Morrison SW,Kafrawy AH

更新日期：1992-02-01 00:00:00

abstract：:The sealing ability of copal varnish has been investigated when used as an adjunct in restorative procedures, retrofilling procedures, and dontic obturation procedures. Barrier, a polyamide-type polymer cavity varnish, has been compared with copal varnishes in restorative dentistry. This investigation compared the api...

journal_title：Journal of endodontics

authors： Smith DW,Wong M

更新日期：1992-01-01 00:00:00

abstract：:Endodontic therapy has played an important role in maintaining the integrity of the natural dentition as a fully functional and esthetic masticatory apparatus. Although the sealing of the root canal system is usually accomplished by the conservative endodontic approach, cases which have failed or which involve perfora...

journal_title：Journal of endodontics

authors： Nixon CE,Lin L,Jandinski J

更新日期：1991-10-01 00:00:00

abstract：:Twenty-five extracted human maxillary central incisors were randomly divided into five equal groups. Crowns were removed 1 mm incisal to the cementoenamel junction. Endodontic treatment was carried out and each tooth was affixed with two strain gauges. The strain gauge wires were connected to a Wheatstone Bridge circu...

journal_title：Journal of endodontics

authors： Ross RS,Nicholls JI,Harrington GW

更新日期：1991-09-01 00:00:00

abstract：:Intracoronal bleaching of pulpless teeth with 30% hydrogen peroxide may result in external cervical root resorption. One of several suggested etiological factors associated with this complication is the pH of the bleaching materials. Because the available data on the pH values of bleaching materials were conflicting, ...

journal_title：Journal of endodontics

authors： Rotstein I,Friedman S

更新日期：1991-08-01 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

authors： Wong M

更新日期：1991-07-01 00:00:00

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

authors： Budd CS,Weller RN,Kulild JC

更新日期：1991-06-01 00:00:00

abstract：:Various classes of immunoglobulins have been found in human periapical lesions. The specificity of secreted antibodies against antigens egressing from the root canal system has yet to be thoroughly investigated. The purpose of this study was to test the specificity of antibodies present in human periapical lesions. Hu...

journal_title：Journal of endodontics

authors： Kettering JD,Torabinejad M,Jones SL

更新日期：1991-05-01 00:00:00

abstract：:The effects of parathyroid hormone (PTH), 1,25-dihydroxyvitamin D3, and prostaglandin E2 (PGE2) on alkaline phosphatase activity on cultured dental pulp and gingiva cells of bovine calf were compared. In pulp cells, PTH, 1,25-dihydroxyvitamin D3, and PGE2 significantly increased alkaline phosphatase activity, but no i...

journal_title：Journal of endodontics

authors： Kido J,Ishida H,Nagata T,Hamasaki A,Nishikawa S,Wakano Y

更新日期：1991-04-01 00:00:00

abstract：:Prostaglandins (PG) have been implicated in the genesis of periapical lesions. Periapical specimens from patients with clinical signs and symptoms of chronic and acute apical periodontitis were obtained and immediately frozen in liquid nitrogen. Periradicular tissues from unerupted third molars were frozen and used as...

journal_title：Journal of endodontics

authors： McNicholas S,Torabinejad M,Blankenship J,Bakland L

更新日期：1991-03-01 00:00:00

abstract：:The diameter of nine sizes of three brands of endodontic spreaders was measured at D1 and D16 and compared with corresponding sizes of six brands of accessory gutta-percha cones. Two evaluators independently measured 20 randomly selected samples of each size of finger spreader and accessory gutta-percha cone. A standa...

journal_title：Journal of endodontics

authors： Hartwell GR,Barbieri SJ,Gerard SE,Gunsolley JC

更新日期：1991-01-01 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

authors： Stenman E,Spångberg LS

更新日期：1990-12-01 00:00:00

abstract：:Twenty-one teeth with clinically asymptomatic periapical pathosis (class 3) were extracted and the isolation, identification, and localization of bacteria in the root apex were examined. Mixtures involving several bacteria were isolated from more than 60% of the cases. Scanning electron microscopy revealed bacterial m...

journal_title：Journal of endodontics

authors： Fukushima H,Yamamoto K,Hirohata K,Sagawa H,Leung KP,Walker CB

更新日期：1990-11-01 00:00:00

abstract：:Dentinal chips and different biocompatible materials have been used in the past as apical plugs to enhance healing and simplify obturation. The purpose of this study was to evaluate bone reactions to implants of hydroxyapatite, collagen, and calcium hydroxide, alone or in different combinations. The materials were imp...

journal_title：Journal of endodontics

authors： Pissiotis E,Spangberg LS

更新日期：1990-10-01 00:00:00

abstract：:Gutta-percha (GP) has been the most widely used root canal filling material because of its well-known low toxicity. The inertness of GP, however, was challenged recently. The purpose of this study was to evaluate the toxicity of marketed endodontic GP using the radiochromium release test. Fourteen commercially availab...

journal_title：Journal of endodontics

authors： Pascon EA,Spångberg LS

更新日期：1990-09-01 00:00:00

abstract：:A case is presented in which endodontic treatment of a maxillary lateral incisor with a talon cusp and two root canals failed following a mistaken diagnosis. What was first diagnosed as an endodontic lesion was, in all probability, a primary periodontal lesion caused by the advance of bacteria from the gingival crevic...

journal_title：Journal of endodontics

authors： Fabra-Campos H

更新日期：1990-07-01 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

authors： Spatafore CM,Griffin JA Jr,Keyes GG,Wearden S,Skidmore AE

更新日期：1990-05-01 00:00:00