abstract：:A new endodontic obturation and retrofilling material has been invented to satisfy Grossman's requirements for an ideal material. Methylene blue dye leakage studies were carried out to compare the new material with conventional products, for both obturation and retrofilling. The experimental material when used in root...

journal_title：Journal of endodontics

authors： Reeh ES,Combe EC

更新日期：2002-07-01 00:00:00

abstract：:A comparison was made of the apical leakage of three sealers. Fifty single-root human teeth were randomly divided into 5 groups (n = 10; 3 experimental and 2 control). The teeth of the positive-control and experimental groups were instrumented with K-type files to size 45. The experimental groups were obturated by lat...

journal_title：Journal of endodontics

authors： Lucena-Martín C,Ferrer-Luque CM,González-Rodríguez MP,Robles-Gijón V,Navajas-Rodríguez de Mondelo JM

更新日期：2002-06-01 00:00:00

abstract：:The purpose of this in vitro study was to evaluate the accuracy of Root ZX apex locator to determine the working length in teeth with simulated apical root resorption. Fifty extracted, single-rooted, human teeth with mature apices were used in this study. An irregular cavity defect was drilled at the apex of each toot...

journal_title：Journal of endodontics

authors： Goldberg F,De Silvio AC,Manfré S,Nastri N

更新日期：2002-06-01 00:00:00

abstract：:The cleaning capacity of manual and rotary instrumentation techniques in mesial-distal flattened canals was studied by morphometric analysis. Twenty human mandibular incisors were divided into two groups of 10 teeth each: group 1, crown-down technique with rotary instrumentation using ProFile .04; group 2, crown-down ...

journal_title：Journal of endodontics

authors： Barbizam JV,Fariniuk LF,Marchesan MA,Pecora JD,Sousa-Neto MD

更新日期：2002-05-01 00:00:00

abstract：:Coronal leakage has been recognized as a cause of pulpal and periradicular disease. Although cleaning and shaping of the root canal system is considered paramount, obturation of the system is an important step in endodontic success. The purpose of this study was to evaluate coronal bacterial leakage in teeth obturated...

journal_title：Journal of endodontics

authors： Jacobson HL,Xia T,Baumgartner JC,Marshall JG,Beeler WJ

更新日期：2002-04-01 00:00:00

abstract：: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 wer...

journal_title：Journal of endodontics

authors： Slutzky-Goldberg I,Liberman R,Heling I

更新日期：2002-04-01 00:00:00

abstract：:Immunopathologic reactions play a significant role in inflammatory diseases of dental pulp. Interleukin-1beta (IL-1beta) is recognized as a key player in mediating cellular immune response. In this study, we measured the content of IL-1beta and its effect on collagen synthesis in cultures of fibroblasts derived from h...

journal_title：Journal of endodontics

authors： Barkhordar RA,Ghani QP,Russell TR,Hussain MZ

更新日期：2002-03-01 00:00:00

abstract：:Increased levels of interleukin-1 (IL)-1, tumor necrosis factor-alpha (TNF-alpha), IL-6, and prostaglandin E2 (PGE2) have been detected in inflamed pulp tissue. To gain further insight into the molecular pathogenesis of pulpitis, we investigated the effects of IL-1alpha or TNF-alpha and PGE2, either alone or in combin...

journal_title：Journal of endodontics

authors： Lin SK,Kuo MY,Wang JS,Lee JJ,Wang CC,Huang S,Shun CT,Hong CY

更新日期：2002-03-01 00:00:00

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

authors： Svec TA,Powers JM

更新日期：2002-02-01 00:00:00

abstract：:An in vitro study was conducted to determine the susceptibility of the yeast Candida albicans to various intracanal irrigants and medications. The minimum inhibitory concentration (MIC) of sodium hypochlorite, hydrogen peroxide, chlorhexidine digluconate, and aqueous calcium hydroxide that is required to kill a standa...

journal_title：Journal of endodontics

authors： Ferguson JW,Hatton JF,Gillespie MJ

更新日期：2002-02-01 00:00:00

abstract：:EDTA-T and 10% citric acid used as root canal irrigants lead to more visible dentinal tubules than 5% sodium hypochlorite associated with 3% hydrogen peroxide. However, these cleansing agents must be compatible with apical periodontal tissue. We analyzed the cytotoxicity of 10% citric acid and EDTA-T in cultured fibro...

journal_title：Journal of endodontics

authors： Sceiza MF,Daniel RL,Santos EM,Jaeger MM

更新日期：2001-12-01 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

authors： Loushine RJ,Weller RN,Kimbrough WF,Potter BJ

更新日期：2001-12-01 00:00:00

abstract：:Type IV matrix metalloproteinases (MMPs) are members of the family of MMPs and are thought to play an important role in degradation of extracellular components. Human pulp cells can secrete and produce these enzymes. Recent evidence shows that MMPs may play a role in pulpal inflammation. To date little is known regard...

journal_title：Journal of endodontics

authors： Chang YC,Yang SF,Hsieh YS

更新日期：2001-11-01 00:00:00

abstract：:Enterococcus faecalis has been suggested to be an important etiological agent in endodontic failures. The purpose of this study was to evaluate the effectiveness of chlorhexidine- or antibiotics-based medications in eliminating E. faecalis biofilms. One-day and three-day biofilms of E. faecalis were induced on cellulo...

journal_title：Journal of endodontics

authors： Lima KC,Fava LR,Siqueira JF Jr

更新日期：2001-10-01 00:00:00

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

authors： Tai KW,Huang FM,Chang YC

更新日期：2001-09-01 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

authors： Belli S,Zhang Y,Pereira PN,Pashley DH

更新日期：2001-08-01 00:00:00

abstract：:A case is presented in which a previous partial root canal treatment on a mandibular molar developed internal resorption of the distal canal. The case was followed at the University of Oklahoma student clinic and endodontic treatment completed in the mesial canals, with calcium hydroxide placed in the distal canal for...

journal_title：Journal of endodontics

authors： Benenati FW

更新日期：2001-07-01 00:00:00

abstract：:Characteristics of cyclooxygenase-2 (COX-2) expressing cells in human dental pulp were immunohistologically studied. Extirpated pulpal tissues from extracted teeth were examined to elucidate the localization and distribution of COX-2. Pulpal tissues were examined by the labeled streptavidin biotin method using specifi...

journal_title：Journal of endodontics

authors： Nakanishi T,Shimizu H,Hosokawa Y,Matsuo T

更新日期：2001-06-01 00:00:00

abstract：:Sixty-eight standardized human root specimens were infected with Enterococcus faecalis for 3 wk after removal of the smear layer. After 3 wk of infection, the smear layer was reformed and in half of the specimens, the smear layer was again removed. Aqueous Ca(OH)2 paste and silicone oil based Ca(OH)2 paste were used a...

journal_title：Journal of endodontics

authors： Han GY,Park SH,Yoon TC

更新日期：2001-05-01 00:00:00

abstract：:Amalgam cores with cemented dowels are commonly used to restore endodontically treated teeth. These restorations were widely studied for their mechanical properties; however, less is known about their sealing ability. The effect of the cement type used for the dowel and that of a bonding agent application were studied...

journal_title：Journal of endodontics

authors： Metzger Z,Schaham G,Abramovitz I,Dotan M,Ben-Amar A

更新日期：2001-04-01 00:00:00

abstract：:Inflammation in the dental pulp is accompanied by release of a wide variety of highly oxidative molecules known as reactive oxygen species (ROS). ROS concentrations are controlled in vivo by an antioxidant enzyme scavenger system that may be overwhelmed by the increases in ROS production seen during inflammation. Supp...

journal_title：Journal of endodontics

authors： Baumgardner KR,Sulfaro MA

更新日期：2001-03-01 00:00:00

abstract：:The purpose of this study was to develop a method for lidocaine detection in dental pulp by high-performance liquid chromatography. The amounts of lidocaine in dog pulps were quantitated after local injection to evaluate lidocaine recovery from pulp tissue with this technique. Comparison was also made between the amou...

journal_title：Journal of endodontics

authors： Kanjanawattana S,Mangkornkarn C,Wilairat P,Vongsavan N

更新日期：2001-01-01 00:00:00

abstract：:The present study evaluates the morphological changes in root canal walls and temperature changes at root surfaces as a result of intracanal irradiation by erbium,chromium:YSGG laser under various conditions in vitro. Sixty single-rooted human teeth were examined. Root canals were prepared, and laser irradiation was p...

journal_title：Journal of endodontics

authors： Yamazaki R,Goya C,Yu DG,Kimura Y,Matsumoto K

更新日期：2001-01-01 00:00:00

abstract：:The purpose of this study was to compare the in vitro sealing capacity of five materials, each used as a temporary sealing agent for the walking bleach technique. All teeth received traditional biomechanical root canal instrumentation, after which the walking bleach agent was placed in the pulp chamber space. The occl...

journal_title：Journal of endodontics

authors： Hosoya N,Cox CF,Arai T,Nakamura J

更新日期：2000-12-01 00:00:00

abstract：:Primary intraosseous salivary gland tumors are rare, with mucopidermoid carcinoma being the most frequent histotype. The authors present a case of adenoid cystic carcinoma, located in the mandibular incisor region, associated with pain. Endodontic treatment resulted in increased pain and progressive mandibular expansi...

journal_title：Journal of endodontics

authors： Favia G,Maiorano E,Orsini G,Piattelli A

更新日期：2000-12-01 00:00:00

abstract：:The purpose of this prospective, double-blind, randomized study was to evaluate pain reduction using an intraosseous injection of slow-releasing methylprednisolone in teeth with irreversible pulpitis. Forty subjects presenting for emergency treatment completed the study. Each subject had a tooth with a clinical diagno...

journal_title：Journal of endodontics

authors： Gallatin E,Reader A,Nist R,Beck M

更新日期：2000-11-01 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

authors： Sidow SJ,West LA,Liewehr FR,Loushine RJ

更新日期：2000-11-01 00:00:00

abstract：:The occurrence of Enterococcus faecalis in root canals of previously root filled teeth with apical periodontitis requiring retreatment was studied in Lithuanian patients. Twenty-five asymptomatic teeth were included in the study. Avoiding contamination microbiological samples were taken from the canals before and afte...

journal_title：Journal of endodontics

authors： Peciuliene V,Balciuniene I,Eriksen HM,Haapasalo M

更新日期：2000-10-01 00:00:00

abstract：:The purpose of the study was to evaluate the biocompatibility of two current adhesive resins and a calcium hydroxide cement. Fifty-four polyethylene tubes were filled with these dental materials, which were hand-mixed or light-cured according to the manufacturer's directions: group 1--Clearfill Liner Bond 2 (Kuraray);...

journal_title：Journal of endodontics

authors： Costa CA,Teixeira HM,do Nascimento AB,Hebling J

更新日期：2000-09-01 00:00:00

abstract：:The cytotoxic effects of a new epoxy resin-based root canal sealer (AH-plus), together with those of two other commonly used endodontic sealers (AH26 and zinc oxide-eugenol), have been studied in vitro on a culture of human gingival fibroblasts. Cytotoxicity was assessed by direct incubation of sealers' extracts with ...

journal_title：Journal of endodontics

authors： Azar NG,Heidari M,Bahrami ZS,Shokri F

更新日期：2000-08-01 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

authors： Metzger Z,Marian-Kfir V,Tamse A

更新日期：2000-07-01 00:00:00

abstract：:Apical periodontitis was induced in Wistar rats by exposing the pulp chamber of right mandibular first molars to the oral environment. Animals were killed 0, 5, 10, 15, 20, 30, 60, and 80 days after lesion induction. Microradiographic and automated image analysis showed that the lesions expanded significantly in a tim...

journal_title：Journal of endodontics

authors： Lin SK,Hong CY,Chang HH,Chiang CP,Chen CS,Jeng JH,Kuo MY

更新日期：2000-06-01 00:00:00

abstract：:This report examines three clinical cases of root-filled teeth with primary endodontic lesions. During endodontic surgery, an area of incomplete root bifurcation beginning in the coronal or middle third of the root surface and terminating at or near the apical foramen were observed. The radicular grooves of two teeth ...

journal_title：Journal of endodontics

authors： Simon JH,Dogan H,Ceresa LM,Silver GK

更新日期：2000-05-01 00:00:00

abstract：:Occurrence of apical transportation (AT) may complicate the root filling procedure and result in a compromised seal. In part I of this study, human mandibular premolars with single, curved (21 to 39 degrees), or straight canals were prepared by Lightspeed or a step-back hand filing technique. An AT index was determine...

journal_title：Journal of endodontics

authors： Wu MK,Fan B,Wesselink PR

更新日期：2000-04-01 00:00:00

abstract：:This report presents an unusual indication for root resection of a lower molar tooth and also reviews the history of root resection. ...

journal_title：Journal of endodontics

authors： Johnston DJ,Cowan CG,Hussey DL

更新日期：2000-04-01 00:00:00

abstract：:Nickel-titanium engine-driven rotary instruments are used increasingly in endodontic practice. One frequently mentioned problem is fracture of an instrument in the root canal. Very few studies have been conducted on torsional characteristics of these instruments, and none has been done under dynamic conditions. The pu...

journal_title：Journal of endodontics

authors： Sattapan B,Palamara JE,Messer HH

更新日期：2000-03-01 00:00:00

abstract：:This study investigated the retreatment effectiveness of .04 Taper nickel-titanium rotary ProFiles. Thirty extracted single-rooted anterior teeth were instrumented and obturated with gutta-percha/Roth's Sealer using lateral condensation. They were distributed into three groups of 10 each. Retreatment for group A was d...

journal_title：Journal of endodontics

authors： Sae-Lim V,Rajamanickam I,Lim BK,Lee HL

更新日期：2000-02-01 00:00:00

abstract：:It is thought that externally applied bleaching agents may penetrate into the pulp chamber. This study was conducted to evaluate the diffusion of peroxide bleaching agents into the pulp chamber of teeth restored with various restorative materials. Sixty-five human extracted anterior maxillary teeth were separated into...

journal_title：Journal of endodontics

authors： Gökay O,Yilmaz F,Akin S,Tunçbìlek M,Ertan R

更新日期：2000-02-01 00:00:00

abstract：:The purpose of this study was to evaluate the bleaching effect of sodium percarbonate on artificially stained pulpless teeth. Twenty extracted human mandibular premolars were stained by immersing them in human blood mixed with iron sulfide, and divided into three test groups and one control group. The following bleach...

journal_title：Journal of endodontics

authors： Kaneko J,Inoue S,Kawakami S,Sano H

更新日期：2000-01-01 00:00:00

abstract：:The antimicrobial effect of RC-Prep and its components--10% urea peroxide, 15% EDTA, and glycol--were evaluated individually, in vitro, within dentinal tubules. Standardized bovine incisor root specimens that had been infected with either Staphylococcus aureus or Streptococcus peltzer were incubated with each agent fo...

journal_title：Journal of endodontics

authors： Heling I,Irani E,Karni S,Steinberg D

更新日期：1999-12-01 00:00:00