abstract：:Mineral Trioxide Aggregate (MTA) has been shown in a number of experiments to be a potential root-end filling material. The purpose of this study was to examine the periradicular tissue response of monkeys to MTA and amalgam as root-end fillings. The pulps were removed from all the maxillary incisors of three monkeys....

journal_title：Journal of endodontics

authors： Torabinejad M,Pitt Ford TR,McKendry DJ,Abedi HR,Miller DA,Kariyawasam SP

更新日期：1997-04-01 00:00:00

abstract：:The purpose of this study was to compare the degree of anesthesia obtained with 2% lidocaine with three different concentrations of epinephrine for inferior alveolar nerve block. Using a repeated measures design, 30 subjects randomly received an inferior alveolar injection using masked cartridges of each solution at t...

journal_title：Journal of endodontics

authors： Dagher FB,Yared GM,Machtou P

更新日期：1997-03-01 00:00:00

abstract：:The biocompatibility and apical microleakage of tricalcium phosphate based Sankin Apatite (SA) Type I, II, and III root canal sealers were investigated. Teflon tubes containing freshly mixed test materials were implanted in the subcutaneous tissue of mice. The observation periods were 24 h, 7, and 30 days, after which...

journal_title：Journal of endodontics

authors： Bilginer S,Esener T,Söylemezoğlu F,Tiftik AM

更新日期：1997-02-01 00:00:00

abstract：:Intermediate Restorative Material (IRM) has been advocated as a root-end filling material based primarily on reports of clinical success and various leakage studies. The objectives of this study were to determine the excisional wound healing responses of the periradicular tissues to IRM root-end filling material and t...

journal_title：Journal of endodontics

authors： Harrison JW,Johnson SA

更新日期：1997-01-01 00:00:00

abstract：:A unique case of a mandibular molar with 5 canals is described. Literature pertaining to the analysis of the morphology of mandibular first molars is reviewed. Clinicians should thoroughly examine the pulpal floor and radiographs for the possibility of additional canals. ...

journal_title：Journal of endodontics

authors： DeGrood ME,Cunningham CJ

更新日期：1997-01-01 00:00:00

abstract：:The effects of various cleaning, chemical disinfection, and sterilization procedures on the cutting efficiency of endodontic instruments Unifile (De Trey, Bois Colombes, France), (Flexofile Maillefer, Ballaigues, Switzerland), and H-File (Maillefer)) were investigated. The cross-infection control treatment procedures ...

journal_title：Journal of endodontics

authors： Haïkel Y,Serfaty R,Bleicher P,Lwin TT,Allemann C

更新日期：1996-12-01 00:00:00

abstract：:Strippings are problems that are frequent on thin and concave roots. Treatment and prognosis differ from that of a lateral root perforation because of the size, oval shape, and thin edges of the striping. We propose a two-step technique: an endodontic phase in which the root canal system is sealed with gutta-percha ov...

journal_title：Journal of endodontics

authors： Allam CR

更新日期：1996-12-01 00:00:00

abstract：:This study investigated the possibility of saliva recontamination occurring between the root canal wall and sealer through dentinal tubules exposed after the cementum was removed at the cervical level by root planing and treatment with citric acid. Thirty-four extracted human maxillary anterior teeth were randomly pla...

journal_title：Journal of endodontics

authors： Berutti E

更新日期：1996-11-01 00:00:00

abstract：:The aim of this study was to assess the cytotoxicity of pure eugenol in an in vitro method by diluting it to various concentrations in alcohol and determining the maximum noncytotoxic concentration. We used solutions of eugenol and ethyl alcohol that are soluble in water in any given proportion. The cytotoxicity of th...

journal_title：Journal of endodontics

authors： Gerosa R,Borin M,Menegazzi G,Puttini M,Cavalleri G

更新日期：1996-10-01 00:00:00

abstract：:A retrograde root-end cover with a special resin composite (Retroplast) combined with the dentin bonding agent Gluma (Bayer AG) has been used since 1984 by the authors. Its content of silver, added to promote radiopacity, has been found to lower the working time and storage stability of the composite and might cause d...

journal_title：Journal of endodontics

authors： Rud J,Rud V,Munksgaard EC

更新日期：1996-09-01 00:00:00

abstract：:This study investigated possible collateral C-fiber innervation between the pulps of rat molars by assessing neurogenic inflammation (NI) induced by the C-fiber excitant mustard oil (MO). MO was applied to the pulp of the left mandibular first molar in two groups of rats: group 1, guanethidine sympathectomized rats (t...

journal_title：Journal of endodontics

authors： Komorowski RC,Torneck CD,Hu JW

更新日期：1996-08-01 00:00:00

abstract：:The antibacterial activity of three commercial 10% carbamide peroxide bleaching agents (Nite White, Karisma, and Opalescence) on Streptococcus mutans, Streptococcus mitis, Streptococcus sanguis, Lactobacillus casei, and Lactobacillus acidophilus was examined. Chlorhexidine (0.2%) was used as a positive control. Test m...

journal_title：Journal of endodontics

authors： Gurgan S,Bolay S,Alaçam R

更新日期：1996-07-01 00:00:00

abstract：:In vitro root surface temperatures produced during post space preparation were measured. The preparations were made using a GPX bur with rotational speeds of 6,500, 8,000, 9,500, 11,000, and 15,000 rpm. The overall mean temperature increase ranged from 0.66 degree to 4.81 degrees C and was greatest at 8,000 rpm. When ...

journal_title：Journal of endodontics

authors： Weller RN,Kimbrough WF,Anderson RW

更新日期：1996-06-01 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

authors： Lauper R,Lutz F,Barbakow F

更新日期：1996-05-01 00:00:00

abstract：:The purpose of this study was to evaluate the integrity of resected root-end surfaces of extracted human teeth after using ultrasonic tips at low or high frequencies for root-end preparation. Thirty bilaterally matched pairs of single-rooted human teeth had root-end resections using a low-speed diamond saw and were ex...

journal_title：Journal of endodontics

authors： Layton CA,Marshall JG,Morgan LA,Baumgartner JC

更新日期：1996-04-01 00:00:00

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

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

更新日期：1996-03-01 00:00:00

abstract：:No information could be found in the dental literature on the hardness or strength of the materials in root canal instruments. Hardness testing is a convenient method for examining these products, and strength properties can be deduced from available strength-hardness data. The Vickers hardness of cross-sections of st...

journal_title：Journal of endodontics

authors： Brockhurst PJ,Denholm I

更新日期：1996-02-01 00:00:00

abstract：:An in vitro, flow-through optical system was designed to measure hemoglobin (Hb) concentrations in the pulp space. The system included light-emitting diodes and a silicon photodetector positioned on opposing surfaces of human teeth. A syringe pump allowed a controlled flow of blood through the pulp chamber. The Hb con...

journal_title：Journal of endodontics

authors： Diaz-Arnold AM,Arnold MA,Wilcox LR

更新日期：1996-01-01 00:00:00

abstract：: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 ...

journal_title：Journal of endodontics

authors： D'Souza JE,Walton RE,Maixner D

更新日期：1995-12-01 00:00:00

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

authors： Goon WW,Lundergan WP

更新日期：1995-11-01 00:00:00

abstract：:This study describes three methods of computerized three-dimensional reconstruction of the main neurovascular pulpal bundle of human teeth, using serial cross-paraffin sections, digital image processing, and three-dimensional computer graphics. These methods are surface representation, representation by means of a sta...

journal_title：Journal of endodontics

authors： Lyroudia K,Nikolaidis N,Pitas I,Palakidis K

更新日期：1995-10-01 00:00:00

abstract：:This study compared the effectiveness of four different techniques used for obturation of single rooted-teeth: lateral condensation, low-temperature gutta-percha (Ultrafil), vertical condensation of gutta-percha softened by means of three different laser devices (argon, CO2, and Nd:YAG), or composite resin photopolyme...

journal_title：Journal of endodontics

authors： Anić I,Matsumoto K

更新日期：1995-09-01 00:00:00

abstract：:The mesiobuccal roots of 50 randomly selected maxillary first molars were examined to assess the incidence and position of the canal isthmus. Transverse serial sections of the apical 6 mm of each root were prepared in 1-mm increments. The apical side of each section was stained with methylene blue dye, viewed with a s...

journal_title：Journal of endodontics

authors： Weller RN,Niemczyk SP,Kim S

更新日期：1995-07-01 00:00:00

abstract：:The influence of different obturation techniques (lateral condensation, Obtura, and Thermafil) on root strains was assessed in 27 upper central incisors using strain gauges mounted on the coronal and apical one-thirds of the root surface. The vertical load applied with each obturation technique was also measured. Comp...

journal_title：Journal of endodontics

authors： Saw LH,Messer HH

更新日期：1995-06-01 00:00:00

abstract：:Root resorption after replantation of mature permanent dog incisors was examined by scanning electron microscopy. Three groups consisting of three extracted teeth each were kept in a saline solution for 5, 30, and 120 min before replantation. The first group was replanted with the pulp intact. The second and third gro...

journal_title：Journal of endodontics

authors： Günday M,Sazak H,Türkmen C

更新日期：1995-05-01 00:00:00

abstract：:The role of T-cells in the development of periapical lesions was investigated immunohistochemically using 16 normal (BALB/c) mice and 16 nude (BALB/c nu/nu) mice (congenitally T-cell-deficient mice). The pulp chambers of maxillar first molars of all mice were opened, and the infiltrated immunocytes (anti-Thy1.2, -Lyt-...

journal_title：Journal of endodontics

authors： Tani N,Kuchiba K,Osada T,Watanabe Y,Umemoto T

更新日期：1995-04-01 00:00:00

abstract：:Previous dye leakage studies have shown that mineral trioxide aggregate leaks significantly less than other commonly used root-end filling materials. This study determined the time needed for Staphylococcus epidermidis to penetrate a 3-mm thickness of amalgam, Super-EBA, Intermediate Restorative Material (IRM), or min...

journal_title：Journal of endodontics

authors： Torabinejad M,Rastegar AF,Kettering JD,Pitt Ford TR

更新日期：1995-03-01 00:00:00

abstract：:The objective of this study was to assess and compare canal blockages and apical extrusion of dentin debris during canal shaping with eight preparation techniques. A total of 208 canals in extracted human teeth were prepared by one operator using one type of file. The techniques included were standardized, stepback wi...

journal_title：Journal of endodontics

authors： al-Omari MA,Dummer PM

更新日期：1995-03-01 00:00:00

abstract：:The difference in resistance to bacterial invasion into the dentinal tubules between vital and nonvital teeth has not been determined. This study was conducted to clarify the effect of vital pulp on bacterial invasion into the dentinal tubules. The specimens were 19 intact pairs of bilateral upper third molars of 19 h...

journal_title：Journal of endodontics

authors： Nagaoka S,Miyazaki Y,Liu HJ,Iwamoto Y,Kitano M,Kawagoe M

更新日期：1995-02-01 00:00:00

abstract：:The state of contamination by methicillin-resistant Staphylococci, including methicillin-resistant Staphylococcus aureus (MRSA) at the conservative dentistry section of the School of Dentistry, Aichi-Gakuin University, was investigated. Methicillin-resistant coagulase-negative Staphylococci (MRCNS) were detected in 8 ...

journal_title：Journal of endodontics

authors： Horiba N,Yoshida T,Suzuki K,Maekawa Y,Ito M,Matsumoto T,Nakamura H

更新日期：1995-01-01 00:00:00

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

authors： Carman JE,Wallace JA

更新日期：1994-12-01 00:00:00

abstract：:In the past, measurement of microleakage has been based on measurement of dye or radioactive isotope penetration. A method has been developed to allow electronic monitoring of microflow in the same specimen over a period of time. This method was used to compare previously reported retrograde materials with an amalgam/...

journal_title：Journal of endodontics

authors： Callis PD,Mannan G

更新日期：1994-11-01 00:00:00

abstract：:Ultrasonic instruments are a valuable asset for removing intraradicular posts from root canals before nonsurgical endodontic therapy. The purpose of this study was to evaluate the relative efficacy of post removal by ultrasonic and sonic devices. Fifty extracted teeth were instrumented and obturated. The canals were p...

journal_title：Journal of endodontics

authors： Buoncristiani J,Seto BG,Caputo AA

更新日期：1994-10-01 00:00:00

abstract：:A technique utilizing fiberoptics to transilluminate a beveled root surface during periradicular surgery is described. This procedure when integrated with other standard endodontic surgical aids may help diagnose apical variations and vertical root fractures. ...

journal_title：Journal of endodontics

authors： Schindler WG,Walker WA 3rd

更新日期：1994-08-01 00:00:00

abstract：:This study sought to evaluate the influence of apical enlargement on the sealing ability of vertical compaction. Sixty anterior teeth were used. Half of these teeth were prepared to a size 25 file and the other half to a size 40 file. Then vertical compaction was performed. Apical microleakage was determined using pre...

journal_title：Journal of endodontics

authors： Yared GM,Bou Dagher FE

更新日期：1994-07-01 00:00:00

abstract：:The external cervical root resorption associated with intracoronal bleaching of pulpless teeth can be a devastating lesion. It often cannot be repaired. To prevent this problem, increasing attention has been focused on placing a barrier between the pulp chamber and the endodontic filling material. The objective of thi...

journal_title：Journal of endodontics

authors： Steiner DR,West JD

更新日期：1994-06-01 00:00:00

abstract：:Unlike most cases of combined orthodontic and endodontic therapy that have been reported, in this case endodontic treatment with calcium hydroxide-induced calcification was utilized prior to orthodontic treatment. A 14-yr-old female required orthodontic therapy due to anterior crowding. Preoperative periapical radiogr...

journal_title：Journal of endodontics

authors： Gruendeman GW,Weine FS,Janik JM

更新日期：1994-05-01 00:00:00

abstract：:The most striking disadvantage of most apex locators is that if there are electrolytes in the canal the meter shows a reading which is too short or sometimes the measurement itself becomes impossible. To overcome this drawback, a new concept for electrically measuring the root canal length has been developed. The devi...

journal_title：Journal of endodontics

authors： Kobayashi C,Suda H

更新日期：1994-03-01 00:00:00

abstract：:When dentin is planed by endodontic instruments, a smear layer forms. Whether this layer should be removed is unknown and controversial. This study was conducted to assess the effect of the smear layer on retention of bacteria using an in vitro root canal bacterial colonization model. Canals of 26 extracted human cani...

journal_title：Journal of endodontics

authors： Drake DR,Wiemann AH,Rivera EM,Walton RE

更新日期：1994-02-01 00:00:00

abstract：:The purpose of this study was to investigate histologically and histometrically the changes in pulpal and periapical tissues after pulpal exposure in rats. All animals received a pulpal exposure in the left mandibular first molar. Animals were killed at 1 to 56 days after pulpal exposure, and their mandibles were eval...

journal_title：Journal of endodontics

authors： Yamasaki M,Kumazawa M,Kohsaka T,Nakamura H,Kameyama Y

更新日期：1994-01-01 00:00:00