Articles - Endodontic Articles 5 en-us http://endodonticsjournal.com N/A http://endodonticsjournal.com muveqqeti@gmail.com 20 http://endodonticsjournal.com/articles/53/1/Reduction-in-intracanal-bacteria-during-root-canal-preparation-with-and-without-apical-enlargement/Page1.html L. G. Coldero, S. McHugh, D. MacKenzie & W. P. SaundersDental School, Department of Statistics, University of Glasgow, Glasgow, UK.University of Dundee Dental School, Dundee, UK. Aim.To compare in vitro intracanal bacterial reduction using nickelâ€"titanium rotary instruments with and without apical enlargement. Conclusions.There was no significant difference in intracanal bacterial reduction when Niâ€"Ti GT rotary preparation with NaOCl and EDTA irrigation was used with or without apical enlargement preparation technique. It may therefore not be necessary to remove dentine in the apical part of the root canal when a suitable coronal taper is achieved to allow satisfactory irrigation of the root canal system with antimicrobial agents. muveqqeti@gmail.com (JofER editor) Thu, 09 May 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/52/1/In-vitro-comparison-of-different-types-of-sodium-perborate-used-for-intracoronal-bleaching-of-discoloured-teeth/Page1.html H. Ari & M. ÜngörSelcuk University Faculty of Dentistry, Department of Endodontics, Konya, Turkey. Aim.To compare the bleaching efficacy of three different types of sodium perborate (SP) commonly used for intracoronal bleaching of discoloured non-vital teeth. Conclusion.The data obtained from this study demonstrate that sodium perborate can be used mixed with water rather than with hydrogen peroxide for bleaching discoloured teeth. muveqqeti@gmail.com (JofER editor) Wed, 08 May 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/51/1/Bacterial-and-fungal-microleakage-of-AH26-and-AH-Plus-root-canal-sealers/Page1.html I. Miletie, G. Prpie-Mehifie, T. Maruan, A. Tambie-Andrauevie, S. Pleuko, Z. Karlovie & I. AnieDepartment of Dental Pathology, School of Dentistry, University of Zagreb, Croatia.University Hospital of Infectious Diseases ‘Dr Fran Mihaljevib, Zagreb, Croatia. Aim.To evaluate the penetration of Candida albicans alone and a combination of bacteria through root canals filled with gutta-percha and one or other root canal sealers, AH26 and AH Plus. Conclusion.Leakage in the experimental teeth occurred between 14 and 87 days. Leakage was present in 47% of all samples. From the samples with AH26, 45% leaked bacteria and 60% leaked fungi; whilst from the samples with AH Plus, 50% leaked bacteria and 55% fungi. There was no statistically significant difference in penetration of bacteria and fungi between the sealers. muveqqeti@gmail.com (JofER editor) Sun, 05 May 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/50/1/A-scanning-electron-microscopic-study-of-debris-and-smear-layer-remaining-following-use-of-GT-rotary-instruments/Page1.html G. Gambarini & J. LaszkiewiczDepartment of Periodontics-Endodontics, University of Rome, “La Sapienza”, Rome, Italy.Department of Conservative Dentistry, Institute of Dentistry, Medical University, Lodz, Poland. Aim.The aim of the present study was to assess debris and smear layer remaining following canal preparation with GT rotary instruments. Conclusions.Under the conditions of the present study GT rotary instruments removed debris effectively, but left root canal walls covered with smear layer, particularly in the apical third. muveqqeti@gmail.com (JofER editor) Sat, 04 May 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/49/1/Evaluation-of-smear-layer-removal-by-EDTAC-and-sodium-hypochlorite-with-ultrasonic-agitation/Page1.html D. M. Z. Guerisoli, M. A. Marchesan, A. D. Walmsley, P. J. Lumley & J. D. PecoraRibeirao Preto Dental School, University of Sao Paulo, Ribeirao Preto, Brazil.School of Dentistry, University of Birmingham, Birmingham, UK. Aim.To evaluate smear layer removal by different irrigating solutions under ultrasonic agitation. Conclusions.According to the methodology employed, it can be concluded that 1.0% sodium hypochlorite associated with 15% EDTAC is efficient in removing the smear layer from root canal walls. Irrigation with distilled water or 1.0% sodium hypochlorite alone did not produce root canal walls free of smear layer. When groups were examined separately, there were no statistical differences between the amount of smear layer found on canal walls in the cervical, middle and apical thirds. muveqqeti@gmail.com (JofER editor) Thu, 02 May 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/48/1/External-cervical-resorption-associated-with-localized-gingival-overgrowth/Page1.html K. Patel, U. R. Darbar & K. GulabivalaDivision of Restorative Dental Sciences, Eastman Dental Institute and Hospital for Oral Health Care Sciences, London, UK. Aim.To describe the presentation and management of an unusual lesion of external cervical resorption. Summary.The salient features of this unusual presentation of the external cervical resorption with localized gingival overgrowth, and the resorption located almost wholly on the labial aspect of a maxillary incisor crown are described. Extensive loss of enamel had occurred. The management and possible aetiology of the resorptive lesion are discussed. Key learning points. Localized gingival overgrowth can be associated with external cervical resorption. The cervical resorption does not necessarily indicate pulp canal infection and the need for root-canal treatment. muveqqeti@gmail.com (JofER editor) Tue, 30 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/47/1/Root-canal-treatment-of-a-trifid-crown-premolar/Page1.html Y. Nahmias & M. E. RampadoDepartment of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada. Aim.To describe successful root-canal treatment of a permanent maxillary first premolar with unusual anatomy. Summary.A diagnosis of irreversible pulpitis of a geminated first premolar was made. Clinical and radiographic examination revealed a tooth with a trifid crown that joined to give the appearance of a single root at the cementoenamel junction. Root-canal treatment involved three separate access openings and treating four canals, three of which joined to exit through a common foramen. Key learning points. Symptomatic teeth with morphological aberrations can be saved by root-canal treatment. Careful clinical and radiographic evaluation are essential, as treatment must be modified to address the unusual complexities of the root-canal system(s). muveqqeti@gmail.com (JofER editor) Sat, 27 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/46/1/Dynamic-torque-and-apical-forces-of-ProFile-04-rotary-instruments-during-preparation-of-curved-canals/Page1.html O. A. Peters & F. Barbakow Department of Preventive Dentistry, Cariology and Periodontology, University of Zurich, Zurich, Switzerland. Aim.To analyse torque and force generated whilst shaping curved canals using rotary instruments. Conclusions. Torsional moments can be evaluated during simulated preparation of curved root canals using the torque-testing device described in this paper. A specific sequence for ProFile .04 rotary instruments intended to produce large apical stops generated torque scores greater than 20 Nmm for size 35 and 40 instruments. Apically directed forces exceeded 1.5 N in all cases, but were less than 8 N. During simulated canal preparation, the number of revolutions did not exceed 41, indicating that up to 10 curved root canals can be safely prepared with a set of ProFile .04 rotary instruments. muveqqeti@gmail.com (JofER editor) Wed, 24 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/45/1/Effect-of-three-root-canal-sealers-on-the-retentive-strength-of-endodontic-posts-luted-with-a-resin-cement/Page1.html M. S. Hagge, R. D. M. Wong & J. S. LindemuthDepartments of Restorative Dentistry and Endodontics, University of the Pacific, San Francisco, USA.Department of General Dentistry Resident Training, Travis Air Force Base, Fairfield, California, USA.Aim.This investigation examined what effect three different sealers had on retention of endodontic posts (Parapost) luted with a resin cement (Panavia 21 OP). Conclusion.Root canal sealers formulated with eugenol, resin, and calcium hydroxide bases had no statistically significant influence on the mean retention strength values of a passive endodontic post luted with a composite resin cement. Therefore, this study did not validate the rationale of avoiding eugenol-containing root canal sealers when subsequent intracanal dentine bonding is planned. muveqqeti@gmail.com (JofER editor) Tue, 16 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/44/1/Invasion-of-vascular-cells-in-vitro-by-Porphyromonas-endodontalis/Page1.html B. R. Dorn, L. J. Harris, C. T. Wujick, F. J. Vertucci & A. Progulske-Fox Center for Molecular Microbiology, Department of Oral Biology, Department of Endodontics, College of Dentistry, University of Florida, Gainesville, FL, USA. Aim.The objective of this study was to determine whether laboratory strains and clinical isolates of microorganisms associated with root canal infections can invade primary cultures of cardiovascular cells. Results.Of the laboratory and clinical strains tested, only P. endodontalis ATCC 35406 was invasive in an antibiotic protection assay using HCAEC and CASMC. Invasion of P. endodontalis ATCC 35406 was confirmed by transmission electron microscopy. muveqqeti@gmail.com (JofER editor) Mon, 15 Apr 2002 00:00:00 -0500