# Endodontics Journal


## Posts

- [A comparative study of root canal preparation using ProFile .04 and Lightspeed rotary Ni–Ti instruments](https://endodonticsjournal.com/root-canal/a-comparative-study-of-root-canal-preparation-using-profile-04-and-lightspeed-rotary-ni-ti-instruments/): J. Versümer, M. Hülsmann &amp; F. SchäfersDepartment of Operative Dentistry, University of Göttingen, Germany Aim.The purpose of this study was to compare several parameters of root canal preparation using two different rotary nickel–titanium instruments: ProFile .04 (Dentsply/Maillefer, Ballaigues, Switzerland) and Lightspeed (Lightspeed Technology Inc., San Antonio, TX, USA). Conclusions.Both systems under investigation respected original root canal curvature and were safe to use. Both systems can be recommended for clinical use. Introduction. The main parameters included in the evaluation of any technique or device for root canal preparation should be the ability to clean the root canal walls and to shape [&hellip;]
- [In vitro cytotoxicity of a composite resin and compomer](https://endodonticsjournal.com/root-canal/in-vitro-cytotoxicity-of-a-composite-resin-and-compomer/): C. A. Quinlan, D. M. Zisterer, K. F. Tipton &amp; M. I. O’SullivanDublin Dental HospitalDepartment of Biochemistry, Trinity College, Dublin, Ireland Aim.This work was designed to investigate the potential cytotoxicity of two of the newer dental restorative materials, Spectrum® composite resin and Dyract® AP compomer. Conclusions.These results indicate the restorative materials to be potentially toxic, particularly if the degree of light-cure is inadequate. Introduction. Many new dental restorative materials have entered the market in recent years. It is claimed these products have many advantages, such as fluoride release and improved adhesion to enamel and dentine. However, in many cases, the [&hellip;]
- [Root and canal morphology of Thai mandibular molars](https://endodonticsjournal.com/root-canal/root-and-canal-morphology-of-thai-mandibular-molars/): K. Gulabivala, A. Opasanon, Y.-L. Ng &amp; A. AlaviDepartment of Conservative Dentistry, Eastman Dental Institute for Oral Health Care Sciences, University College London, London, UK Aim.To investigate the root and canal morphology of 351 mandibular permanent molars collected from an indigenous Thai population. Conclusions.This study suggests that Thai molars exhibit features of both Caucasian and Chinese teeth. Introduction. The study of root and canal anatomy has endodontic (Vertucci 1984) and anthropological (Tratman 1950, Dahlberg 1965, Walker 1988a,b) significance. It is important to be familiar with variations in tooth anatomy and characteristic features in various racial groups since such knowledge can [&hellip;]
- [Incidence of root fractures and methods used for post removal](https://endodonticsjournal.com/root-canal/incidence-of-root-fractures-and-methods-used-for-post-removal/): P. V. AbbottSchool of Dental Science, University of Melbourne, Melbourne, Victoria, Australia Aim.This study was undertaken to determine the incidence of root fractures during post removal, as well as the methods used and the success rates achieved with various post removal devices and techniques. Conclusions.This study indicates that, with good case selection, post removal is a predictable procedure. If appropriate techniques and devices are used for the particular type of post being removed, then root fracture is a rare occurrence. Introduction. The dental literature contains little information about the removal of posts from teeth that require root canal retreatment. Most [&hellip;]
- [Non-surgical root canal treatment of dens invaginatus type 2 in a maxillary lateral incisor](https://endodonticsjournal.com/root-canal/non-surgical-root-canal-treatment-of-dens-invaginatus-type-2-in-a-maxillary-lateral-incisor/): T. Tsurumachi, M. Hayashi &amp; O. TakeichiDepartment of Endodontics, Nihon University School of Dentistry, Tokyo, Japan Aim.To describe the clinical management of an unusual dens invaginatus type 2. Summary.A case of dens invaginatus in a maxillary lateral incisor with a periapical lesion is reported. The patient presented with pain and localized swelling. Despite the complex anatomy and diagnosis of dens invaginatus , non-surgical root canal treatment was performed successfully. Key learning points.• Dens invaginatus may be presented in many forms, and the aetiology of this phenomenon is not fully understood.• Due to abnormal anatomical configuration, dens invaginatus presents technical difficulties [&hellip;]
- [Periapical endodontic surgery: a 3-year follow-up study](https://endodonticsjournal.com/root-canal/periapical-endodontic-surgery-a-3-year-follow-up-study/): M. Maddalone &amp; M. GaglianiRestorative &amp; Endodontic Department, School of Dentistry, University of Milan, Milan, Italy. Aim.To monitor the outcome of periradicular surgery in a group of teeth treated with microsurgical technology and ultrasonic root-end preparation. Conclusion.Modern surgical endodontic procedures associated and EBA (Super Seal, Ogna Pharmaceuticals, Milan, Italy) root end fillings were successful over 3 years in 92.5% of cases. Introduction &#8211; Materials and methods. M. Maddalone &amp; M. GaglianiRestorative &amp; Endodontic Department, School of Dentistry, University of Milan, Milan, Italy. Introduction. Surgical endodontics is a reliable method for the treatment of teeth with periapical lesions that do not [&hellip;]
- [Periapical health and treatment quality assessment of root-filled teeth in two Canadian populations](https://endodonticsjournal.com/root-canal/periapical-health-and-treatment-quality-assessment-of-root-filled-teeth-in-two-canadian-populations/): N. N. Dugas, H. P. Lawrence, P. E.Teplitsky, M. J. Pharoah &amp; S. FriedmanDepartments of Endodontics, Community Dentistry, Radiology, Faculty of Dentistry, University of Toronto,124 Edward Street, Toronto, Ontario, Canada.Endodontics, College of Dentistry, University of Saskatchewan, 105 Wiggins Road, Saskatoon, Saskatchewan, Canada. Aim.The prevalence of apical periodontitis (AP) and the quality of root fillings and restorations were determined in two Canadian populations differing in availability of endodontists. Conclusions.The prevalence of AP in root-filled and untreated teeth was comparable to that reported in previous methodologically compatible studies. The quality of both the root filling and the restoration were found to impact [&hellip;]
- [Campylobacter gracilis and Campylobacter rectus in primary endodontic infections](https://endodonticsjournal.com/microbiology/campylobacter-gracilis-and-campylobacter-rectus-in-primary-endodontic-infections/): J.F. Siqueira Jr &amp; I.N. RocasDepartment of Endodontics, Faculty of Dentistry, Estacio de Sa University, Rio de Janeiro, RJ, Brazil.Laboratory of Oral Microbiology, Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Aim.A species-specific nested polymerase chain reaction (PCR) assay was used to investigate the occurrence of Campylobacter gracilis and C. rectus in primary root canal infections. Conclusions.Findings confirmed the assertion that both C. gracilis and C. rectus participate in infections of endodontic origin and suggest a pathogenetic role with regard to periradicular diseases. Introduction. Primary endodontic infection is caused by microorganisms colonizing the necrotic [&hellip;]
- [Review of the current status of tooth whitening with the walking bleach technique](https://endodonticsjournal.com/tooth-whitening/review-of-the-current-status-of-tooth-whitening-with-the-walking-bleach-technique/): T. Attin, F. Paque, F. Ajam &amp; A. M. LennonDepartment of Operative Dentistry, Preventive Dentistry and Periodontology, Georg-August Universitat Gottingen, Gottingen, Germany. Discoloured teeth, especially in the anterior region, can result in considerable cosmetic impairment. Besides invasive therapies, such as crowning or the placement of veneers, the whitening of teeth is an alternative therapeutic method. In contrast to crowning or veneering, whitening of teeth is relatively non-invasive and conserves dental hard tissue. Vital teeth can be whitened by the nightguard vital bleaching technique utilizing carbamide peroxide gels as the bleaching medium (Fasanaro 1992, Haywood 1992a, b, Attin &amp; Kielbassa 1995, [&hellip;]
- [Healing of apical periodontitis after endodontic treatment: a comparison between a silicone-based and a zinc-oxide-eugenol based sealer](https://endodonticsjournal.com/root-canal/healing-of-apical-periodontitis-after-endodontic-treatment-a-comparison-between-a-silicone-based-and-a-zinc-oxide-eugenol-based-sealer/): S. Huumonen, M. Lenander-Lumikari, A. Sigurdsson &amp; D. OrstavikNIOM, Scandinavian Institute of Dental Materials, Haslum, Norway. University of Turku, Finland.University of North Carolina at Chapel Hill, USA. Introduction. Bacteria in dental root canals play a decisive role in the development of chronic apical periodontitis, and their elimination is the ultimate aim of endodontic treatment of infected teeth. The role of the root filling is to serve as a protection after biomechanical root-canal preparation by preventing bacterial ingress and activity and allowing the regenerative processes in the periapical tissues to proceed without harming them. Different methods and materials have been proposed [&hellip;]
- [Factors influencing the fracture of nickel-titanium rotary instruments](https://endodonticsjournal.com/instruments/factors-influencing-the-fracture-of-nickel-titanium-rotary-instruments/): B. Martin, G. Zelada, P.Varela, J. G. Bahillo, F. Magaan, S. Ahn &amp; C. RodriguezDivision of Dental Pathology and Therapeutics, Department of Stomatology, School of Dentistry, University of Santiago de Compostela, Spain.Department of Computation, Faculty of Computer Science, University of A Coruna, Spain. Introduction. There is a potential risk of rotary nickel-titanium instruments fracturing within the canals. This is a major concern, since it can jeopardize the success of treatment. In most situations, fracture occurs in the apical third of the canal and the remaining portion is often difficult to remove, especially if the canal is narrow (Serene et al. [&hellip;]
- [Tissue reaction initiated by different sealers](https://endodonticsjournal.com/root-canal/tissue-reaction-initiated-by-different-sealers/): M. Bernath &amp; J. Szabo.Department of Dentistry and Oral Surgery, Faculty of Medicine, Pecs University, Pecs, Hungary. Periapical tissue reaction after root canal treatment and/or obturation may be influenced by various factors, including pre-existing disease, elimination of pulp tissue, shaping and cleaning of the root canal system, bacterial infection, filling technique and chemical nature of the sealer (Block et al. 1976; 1985, Taintor et al. 1979, Moller et al. 1981, Walton &amp; Torabinejad 1989, Odesjoet al. 1990). The tissue reaction initiated by sealers can be tested by the analysis of root canal treatment failures in humans (Block et al.1976;1985), but [&hellip;]
- [Examination of cytotoxicity and mutagenicity of AH26 and AH Plus sealers](https://endodonticsjournal.com/root-canal/examination-of-cytotoxicity-and-mutagenicity-of-ah26-and-ah-plus-sealers/): I. Miletic, S. Jukic, I. Anic, D. Z_eljezic, V. Garaj-Vrhovac, M. Osmak.School of Dentistry, University of Zagreb, Croatia.Institute for Medical Research and Occupational Health, Croatia. Introduction. The purpose of root canal treatment is to eliminate infection in the root canal and to fill the root canal space. Various commercial sealers have been developed and used for this purpose. One of them, AH26 sealer (Dentsply, DeTrey, Konstanz, Germany), is frequently used because of its excellent sealing ability (Wu et al.1995, Miletic. et al. 1999). It has been demonstrated, however, that the sealer was cytotoxic during setting (Gerosa et al. 1995) which [&hellip;]


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