Articles - Endodontic Articles 4 en-us http://endodonticsjournal.com N/A http://endodonticsjournal.com muveqqeti@gmail.com 20 http://endodonticsjournal.com/articles/43/1/The-perceived-benefit-of-endodontic-retreatment/Page1.html T. Kvist & C. Reit Department of Endodontology and Oral Diagnosis, Faculty of Odontology, Göteborg University, Gothenburg, Sweden. Aim.There is substantial variation amongst dentists in the management of symptom-free periapical lesions in root-filled teeth. It has been suggested that this variation can be understood as clinicians’ choice of different cut-off points on a continuous periapical health scale (the ‘Praxis Concept (PC) theory’). Based on this suggestion, an individual’s inclination to propose retreatment can be expressed in the Retreatment Preference Score (RPS). In the present study it was hypothesized that: the PC theory is valid amongst experienced endodontists; and that interindividual variation in RPS can be explained by a corresponding variation in the perceived benefit of endodontic retreatment. Conclusions.Findings suggest that the PC theory is valid amongst endodontic experts. The study did not support the notion that the more potential utility that could be produced, the more the individual dentist should tend to perform retreatment. However, alternative consequentialist strategies focusing low risk taking may be involved. muveqqeti@gmail.com (JofER editor) Sat, 13 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/42/1/In-vivo-performance-of-the-new-non-instrumentation-technology-NIT-for-root-canal-obturation/Page1.html A. Lussi, B. Suter, A. Fritzsche, M. Gygax & P. Portmann Department of Operative, Preventive and Paediatric Dentistry, University of Bern, School of Dental Medicine, Bern, Switzerland. Aim.The aim of this in vivo study was to compare the radiographic quality of root fillings performed by the NIT-obturation method versus conventional mechanical obturation. Conclusions.The present investigation demonstrated the performance of the NIT-obturation method in vivo . Root canals filled by the reduced-pressure-method using sealer combined with gutta-percha cones exhibited equivalent radiographic quality compared to conventionally filled canals. muveqqeti@gmail.com (JofER editor) Fri, 12 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/41/1/Direct-amplification-of-rRNA-gene-sequences-for-identification-of-selected-oral-pathogens-in-root-canal-infections/Page1.html J. F. Siqueira Jr, I. N. Rocas, S. R. Moraes & K. R. N. SantosInstitute of Microbiology, Federal University of Rio de Janeiro, RJ, Brazil.Department of Endodontics, Estacio de Sa University, RJ, Brazil.Department of Microbiology, Immunology and Parasitology, School of Dentistry, Veiga de Almeida University, Rio de Janeiro, RJ, Brazil. Aim.The purpose of this study was to assess the prevalence of selected oral pathogens in root canal infections and their relationship with symptoms using a highly sensitive technique, the polymerase chain reaction. Conclusions.Direct molecular approaches appear to be a valuable tool for the rapid and reliable diagnosis of infectious diseases, as well as for research purposes. There was no correlation between target microbial species and symptoms. muveqqeti@gmail.com (JofER editor) Thu, 11 Apr 2002 00:00:00 -0500 http://endodonticsjournal.com/articles/40/1/Measurement-of-strain-on-tooth-roots-during-post-removal-with-the-Eggler-post-remover/Page1.html T. V. Castrisos, J. E. A. Palamara & P. V. AbbottSchool of Dental Science, University of Melbourne, Melbourne, Victoria, Australia.Aim.The aim was to measure root surface strains in teeth when removing cast post/cores with the Eggler post remover. Conclusions.Roots with thin dentine walls were more prone to root fracture during post removal. The Eggler post remover can be used to remove cast posts/cores from teeth with minimal risk of root fracture when applied correctly. Tooth damage may occur if the Eggler device is applied at an angle to the long axis of the tooth root. Care should be taken to ensure that the device is correctly aligned along the long axis of the tooth and the repeller arms contact the mesial and distal dentine surfaces uniformly and simultaneously. Point stresses or shear stresses in the dentine near the repeller arms may occasionally initiate root fracture due to incorrect positioning of the repeller arms. muveqqeti@gmail.com (JofER editor) Sun, 07 Apr 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/39/1/Penetration-of-propylene-glycol-into-dentine/Page1.html E. V. Cruz, K. Kota, J. Huque, M. Iwaku & E. HoshinoDepartments of Operative Dentistry and Endodontics and Oral Microbiology, Cariology Research Unit, Niigata University School of Dentistry, Niigata, Japan. Aim.This study aimed to evaluate penetration of propylene glycol into root dentine. Conclusion.The results of this study indicate that propylene glycol could quickly and efficiently deliver dye through the root canal system. This suggests that propylene glycol may be useful in delivering intracanal medicaments into the root canal. The combination of propylene glycol and dye has the potential to allow for the visualization of tooth structures that could possibly be invaded and colonized by bacteria. muveqqeti@gmail.com (JofER editor) Sat, 06 Apr 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/38/1/Prevalence-of-yeasts-in-saliva-and-root-canals-of-teeth-associated-with-apical-periodontitis/Page1.html M. W. Egan, D. A. Spratt, Y.-L. Ng, J. M. Lam, D. R. Moles & K. GulabivalaDepartments of Conservative Dentistry and Oral Pathology, Eastman Dental Institute for Oral Health Care Sciences, University College London, London, UK. Aim.To determine: the relative prevalence and diversity of yeasts in salivary and root canal samples from the same patients; and the clinical factors associated with their presence in saliva and root canals. Conclusions. The prevalence of yeasts in saliva was 32.7%. The prevalence of yeasts in root canals associated with chronic periapical periodontitis was 10% (untreated root canals, 5.7%; previously treated canals, 16%). There was a significant association between the presence of yeasts in saliva and root canal but the effect of previous root canal treatment and restoration leakage on the recovery of yeasts from root canal was equivocal. muveqqeti@gmail.com (JofER editor) Wed, 03 Apr 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/37/1/A-laboratory-study-of-coronal-microleakage-using-four-temporary-restorative-materials/Page1.html E. V. Cruz, Y. Shigetani, K. Ishikawa, K. Kota, M. Iwaku & H. E. Goodis Department of Operative Dentistry and Endodontics, Niigata University Faculty of Dentistry, Niigata City, Japan.Manila Central University College of Dentistry, Manila, Philippines.Division of Endodontics, University of California San Francisco School of Dentistry, California, USA. Aim.The aim of this study was to compare the sealing abilities of Fermin and Canseal with the more popular temporary coronal filling materials, Cavit and Caviton Conclusion.Amongst the four materials tested, Fermin was observed to provide a consistently tight seal even after being subjected to thermal and load cycling procedures. It was followed by Caviton and then Cavit. This study also showed that thermal cycling procedures seemed to affect the sealing ability of certain types of temporary endodontic filling materials whilst load cycling did not. These results further stress the importance of correctly placing a sufficient thickness of temporary filling material in endodontic access cavities to ensure a tight seal. Additional studies may be needed to verify the quality of seal provided by these materials for prolonged periods. muveqqeti@gmail.com (JofER editor) Mon, 01 Apr 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/36/1/Localized-alveolar-bone-necrosis-following-the-use-of-an-arsenical-paste/Page1.html N. Ã-zmeriç Department of Periodontology, Faculty of Dentistry, Gazi University, Ankara, Turkey. Aim.To describe some toxic effects of arsenic trioxide in the mouth, to condemn its continued use, and present a case in which a tooth was preserved despite significant bony destruction. Key learning points Arsenic and its compounds have no place in contemporary endodontics. Dentists should protect their patients by avoiding the use of arsenic-containing materials and refusing to use products whose constituents are not known. Localized bone necrosis may not require tooth extraction. Depending on the severity of the case, the tooth may be preserved by a combination of endodontic, periodontal, prosthodontic and maintenance therapies. muveqqeti@gmail.com (JofER editor) Tue, 26 Mar 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/35/1/Monitoring-pulp-vitality-after-transplantation-of-teeth-with-mature-roots/Page1.html M. L. Siers, W. L. Willemsen & K. GulabivalaDepartment of Cariology and Endodontology, Faculty of Dental Science, University of Nijmegen, Nijmegen, the Netherlands.Department of Conservative Dentistry, Eastman Dental Institute for Oral Health Care Sciences, University of London, London, UK. Aim.To initiate discussion on the value of routine root canal treatment for transplanted teeth. Key learning points. Following transplantation original pulp tissue may survive the operation. Teeth with obliterated pulp space do not become necrotic more often than those without obliteration. Monitoring the tooth is an acceptable alternative to automatic root canal treatment for transplanted teeth. Root canal treatment should be undertaken only upon occurrence of pathological signs. muveqqeti@gmail.com (JofER editor) Sat, 23 Mar 2002 00:00:00 -0600 http://endodonticsjournal.com/articles/34/1/A-comparison-of-the-shaping-characteristics-of-two-nickelatitanium-endodontic-hand-instruments/Page1.html C. Dobo-Nagy, T. Serban, J. Szabo, G. Nagy  & M. MadlenaDepartment of Prosthetic Dentistry, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.Dental School, Medical University of Pecs, Pecs, Hungary. Aim.The purpose of this study was to compare the shaping characteristics of Niâ€"Ti K-files and Niâ€"Ti S-files manipulated by hand. Conclusions.Under the conditions of this study, preparation with Niâ€"Ti K-files produced more appropriate shapes in roots with apically curved canals than Niâ€"Ti S-files. muveqqeti@gmail.com (JofER editor) Wed, 20 Mar 2002 00:00:00 -0600