Journal of Endodontics Research

Periapical health related to the quality of coronal restorations and root fillings

muveqqeti@gmail.com (JofER editor) — Sun, 11 Aug 2002 00:00:00 -0500

G. M. G. Hommez, C. R. M. Coppens & R. J. G. De Moor Department of Operative Dentistry and Endodontology, Ghent University, Dental School, Ghent University Hospital, Ghent, Belgium.Aim.To evaluate the impact of the quality of coronal restorations scored on a clinical and radiographic basis and the quality of root fillings on periapical health. Conclusion.The results of this study indicate that a well-sealing coronal restoration and a well-performed root-canal treatment are both important for the overall success of rootcanal treatment. For the assessment of coronal leakage as related to apical periodontitis, radiographic evaluation of the coronal restorations is of greater importance than the quality scored only on a clinical basis. Data suggested that the problem of coronal leakage may not be of such clinical impact as indicated by previous studies, provided endodontic treatment procedures are carefully carried out. In addition, it is clear that the use of a base under restorations is beneficial in reducing apical periodontitis.

Comparative in-vitro evaluation of three chelator pastes

muveqqeti@gmail.com (JofER editor) — Wed, 07 Aug 2002 00:00:00 -0500

M. Hulsmann, M. Heckendorff & F. Schafers Department of Operative Dentistry, Preventive Dentistry and Periodontology, University of Gottingen, Gottingen, Germany. Aim.To compare the effect of three paste chelating agents on the root dentine of extracted teeth: Calcinase-Slide (lege artis, Dettenhausen, Germany), Glyde-File (DeTrey/Dentsply, Konstanz, Germany), RCPrep (Premier, Norristown, USA). Conclusions.The use of chelating pastes during root-canal preparation resulted in a measurable time-dependent weight loss and decrease of dentine microhardness. The use of chelator pastes under the conditions of the present study resulted in an improved cleanliness of the root-canal walls in the coronal and middle parts of the root canal.

Periapical healing of endodontically treated teeth in one and two visits obturated in the presence or absence of detectable microorganisms

muveqqeti@gmail.com (JofER editor) — Mon, 05 Aug 2002 00:00:00 -0500

L. B. Peters & P. R.Wesselink Department of Cardiology Endodontology Pedodontology, Amsterdam Academic Centre for Dentistry, Amsterdam, Netherlands.Aim.The purpose of the present study is to evaluate the healing of periapical lesions of teeth with positive and negative canal cultures at the time of obturation, and to evaluate the periapical healing of teeth treated in one visit (without) or in two visits with an inter appointment dressing of calcium hydroxide. Conclusions.Within the limitations of this study, using teeth with a relatively simple anatomy, no significant differences in healing results occurred when small numbers of bacteria (CFU <102) could be cultured or not cultured at obturation. There was no significant difference in healing after root-canal treatment in one and two visits (with interappointment calcium hydroxide dressing). In order toquantitate the effects of treatment on healing in a similar prospective study, a very large group size is needed for definite conclusions.

Corrosion rates of stainless-steel files in different irrigating solutions

muveqqeti@gmail.com (JofER editor) — Sat, 03 Aug 2002 00:00:00 -0500

M. Dartar Oztan, A. A. Akman, L. Zaimoglu & S. BilgicDepartment of Endodontics, Faculty of Dentistry, AnkaraUniversity.Department of Physical Chemistry, Faculty of Science, Ankara University, Ankara,Turkey.Aim.The present study was designed to evaluate and compare the corrosion rates of the stainless-steel endodontic files when immersed in 0.2% chlorhexidine gluconate, 5.25% NaOCl, chlorinated soda with KOH, and 17% EDTA irrigating solutions.Conclusions.The findings of the present study indicated that the root canal irrigants 0.02% chlorhexidine gluconate, 5.25% NaOCl and chlorinated soda with KOH cause severe corrosion on the surface of stainless-steel files. Because corrosion decreases the cutting efficiency of endodontic files, irrigants should be rinsed from files as soon as possible after use and files should be replaced frequently.

Efficiency of the 0.04 taper ProFile during the re-treatment of gutta-percha-filled root canals

muveqqeti@gmail.com (JofER editor) — Thu, 01 Aug 2002 00:00:00 -0500

F. Baratto Filho, E. L. Ferreira & L. F. Fariniuk Department of Endodontics, School of Dentistry, Pontificia Universidade Catolica of Parana, Curitiba, Parana, Brazil.Aim.The objective of this study was to determine the effectiveness of 0.04 ProFile instruments during the removal of root fillings. Conclusions.The 0.04 ProFile system partially removed filling materials from the root canal system allowing the working length to be achieved rapidly, with the advantage that no solvent was required. However, cleaning was not ideal and would require complementary manual instrumentation for total elimination of filling material.

Incomplete tooth fracture following root-canal treatment

muveqqeti@gmail.com (JofER editor) — Sun, 28 Jul 2002 00:00:00 -0500

C.D. Lynch & F.M. Burke Department of Restorative Dentistry, National University of Ireland, Cork, Ireland.Aim.To demonstrate the need for proper restoration of root-filled teeth. Key learning points.Failure to provide a root-filled tooth with a restoration incorporating adequate cuspal protection can lead to subsequent tooth fracture. Large intracoronal restorations should be avoided when restoring root-filled teeth, particularly when marginal ridges have been lost.

Comparison between a conventional technique and two bone regeneration techniques in periradicular surgery

muveqqeti@gmail.com (JofER editor) — Sun, 21 Jul 2002 00:00:00 -0500

S. I. Tobofin, J. A. Arismendi, M. L. Marin, A. L. Mesa & J. A.Valencia Departamento de Estudios Basicos Integrados, Facultad de Odontologia, Universidad de Antioquia. Medellin, Colombia.Aim.The aim was to demonstrate the efficacy of two materials for bone regeneration during periradicular surgery and their effects on the healing of periapical tissues. Conclusions.The results when considered within the limitations of this study indicate that: There was a good clinical and radiographic response at 12 months with the conventional technique, although histological results obtained at the time of the re-entry surgery indicated a less favorable evolution. The use of a nonbioabsorbable membrane alone as a barrier resulted in bone regeneration inmost of the cases according to clinical, radiographic and histological evaluation. The simultaneous use of a nonbioabsorbable membrane and a synthetic bioactive resorbable hydroxylapatite graft produced complete regeneration of bone as observed clinically, radiographically and histologically.

Pulpal anaesthesia for mandibular central incisor teeth: a comparison of infiltration and intraligamentary injections

muveqqeti@gmail.com (JofER editor) — Thu, 18 Jul 2002 00:00:00 -0500

J. G. Meechan & J. I. M. Ledvinka Department of Oral and Maxillofacial Surgery, Newcastle Dental School, University of Newcastle, Newcastle, UK.Aim.This study compared the anaesthetic efficacy of infiltration and intraligamentary injections in the permanent mandibular central incisor. Conclusions.A combination of labial and lingual Infiltration provided better pulpal anaesthesia for mandibular central incisors in adults than either technique in isolation. Intraligamentary injections did not provide reliable pulpal anaesthesia for mandibular central incisors in adults. Intraligamentary injections were more uncomfortable than Infiltrations in the mandibular central incisor region.

Influence of calcium hydroxide intracanal medication on apical seal

muveqqeti@gmail.com (JofER editor) — Mon, 15 Jul 2002 00:00:00 -0500

S. K. Kim & Y. O. Kim Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.Aim.The aim of this study was to determine the influence of calcium hydroxide intracanal medication and various techniques for its removal on the sealing ability of gutta-percha root fillings with a zinc oxide-eugenol sealer. Conclusion.Under the condition of this study, calcium hydroxide medicated canals showed significantly more apical dye-leakage than the non-medicated ones.

Image processing for enhanced observer agreement in the evaluation of periapical bone changes

muveqqeti@gmail.com (JofER editor) — Fri, 12 Jul 2002 00:00:00 -0500

K. Nicopoulou-Karayianni, U. Bragger, A. Patrikiou, A. Stassinakis and N. P. LangDepartment of Oral and Radiographic Diagnosis, and Department of Oral Surgery, School of Dental Medicine, University of Athens, Greece.Department for Periodontology and Fixed Prosthodontics, School of Dental Medicine, University of Berne, Freiburg, Str.7, CH-3010 Berne, Switzerland.Aim.The aim of the present study was to evaluate the effect of root canal treatment on periapical lesions by conventional and subtracted digital radiographic images of clinical cases. Conclusions.It can be concluded that improving feature recognition led to better diagnostic accuracy of periapical bone lesions. Radiographic information can be used more effectively, whilst inter- and intra-examiner variability can be reduced. Clearly digital subtraction radiography observer agreement was highly significantly better during the evaluation of the effect of root canal treatment on periapical lesions.