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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 12
Endodontic Articles 12

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» A quantitative evaluation of apical leakage of four root-canal sealers
By JofER editor | Published 11/30/2008 | Endodontic Articles 12 | Unrated
F. Kont Cobankara, N. Adanir, S. Belli & D. H. Pashley
Department of Endodontics, Facultyof Dentistry, Selcuk University, Konya, Turkey.
Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, GA, USA.

This in vitro study evaluated the microleakage of root fllings involving four root-canal sealers including AH Plus (De-Trey, Switzerland), RoekoSeal (Roeko, Germany), Ketac-Endo (ESPE, Germany) and Sultan (Sultan Chemists, USA).

Root fillings with RoekoSeal in combination with cold lateral condensation technique showed better sealing than those with Ketac-Endo, AH Plus and Sultan sealers after 21 days. The fluid filtration test used in this study gave quantitative results and allowed nondestructive long-term evaluation of specimens.
» Effect of calcium hydroxide as a supplementary barrier in the radicular penetration of hydrogen peroxide during intracoronal bleaching in vitro
By JofER editor | Published 11/29/2008 | Endodontic Articles 12 | Unrated
T. Lambrianidis, A. Kapalas & M. Mazinis
Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.

To examine pH changes in the cervical external root surface, when calcium hydroxide was used as a supplementary barrier to the protective base material during intracoronal bleaching.

The placement of Ca(OH)2 as a supplementary barrier during intracoronal bleaching did not have a significant effect in reversing the acidic pH created at the external root surface in vitro. Its potential effect during these procedures in vivo needs to be further investigated.
» Temporization for endodontics
By JofER editor | Published 11/21/2008 | Endodontic Articles 12 | Unrated
H. J. Naoum & N. P. Chandler
Brindabella Specialist Centre, Dann Close, GARRAN, ACT 2605, Australia.
Department ofO ral Rehabilitation, School of Dentistry, University of Otago, Dunedin, New Zealand.

Teeth undergoing root-canal therapy are susceptible to microbial contamination from oral fluids both during and after treatment. With the exception of single-visit treatment, the use of a temporary restoration is mandatory. This review aims to provide an overview of the materials and techniques used for short- and long-term restorations during and immediately after endodontic treatment, and to make clinical recommendations. Further research is necessary to determine the effectiveness of temporary restorations in the conditions oft he oral environment, especially with respect to leakage and functional demands.
» Periapical lesions accidentally filled with calcium hydroxide
By JofER editor | Published 11/17/2008 | Endodontic Articles 12 | Unrated
R. J. G. DeMoor & A. M. J. C. DeWitte
Department of Operative Dentistry and Endodontology, Dental School, Ghent University, Ghent University Hospital, Gent, Belgium.

To evaluate the effect of accidental and voluminous calcium hydroxide overextensions into periradicular lesions and tissues on the prognosis of periapical healing.

Key learning points.
  • Extensive extrusion of calcium hydroxide into the periapical tissues does not appear to comprise periapical healing.
  • Despite this finding, the deliberate extrusion of dental materials into the apical tissues is not advocated.
» A simple model to demonstrate the electronic apex locator
By JofER editor | Published 11/14/2008 | Endodontic Articles 12 | Unrated
A.C. Tinaz, T. Alacam & O. Topuz
Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.

To describe and evaluate a newly developed model for demonstrating and teaching the use of electronic apex locators.

Key learning points.
  • A simple, inexpensive model can be manufactured from plastic dental jaws, natural teeth and alginate impression material to demonstrate electronic working length measurement.
  • The model is stable for many hours and provides consistent results with different concentrations of NaOCl in the canal and various apical diameters.
  • The model is a useful teaching aid but needs further evaluation and refinement before use in research applications.

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