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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 9
Endodontic Articles 9

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» The effect of instrument type and preflaring on apical file size determination
By JofER editor | Published 09/13/2008 | Endodontic Articles 9 | Unrated
B. T. Tan & H. H. Messer
Department of Restorative Dentistry, School of Dental Science, University of Melbourne, Melbourne, Australia.

Aim.
The aim of this study was to investigate the effect of instrument type (K-files and Lightspeed1 (LS) instruments) and the impact of preflaring on the first file size that binds at working length (WL) in a range of canal types of varying sizes and curvatures.

Conclusions.
Preflaring and use of hand-held LS instruments resulted in an increase in the instrument size that bound at WL. If an operator wishes to determine an accurate master apical file size, canal orifice enlargement should be performed first before the placement of the assessment file.
» Idiopathic osteosclerosis of the jaws followed through a period of 20-27 years
By JofER editor | Published 09/9/2008 | Endodontic Articles 9 | Unrated
A. Halse & O. Molven
Section of Oral Radiology and Section of Endodontics, School of Dentistry, University of Bergen, Bergen, Norway.

Aim.
The aim of the present study was to examine the prevalence of idiopathic osteosclerosis (IO) in a baseline sample and to follow the patients through an extended period of time.

Conclusion.
The present investigation showed that IO lesions observed over a period of more than two decades were stable. The observations support the theory that IO should be considered a normal anatomical variant of bone. In some cases, a local aetiological agent may cause development of structures with an identical appearance.
» Temperature change within gutta-percha induced by the System-B Heat Source
By JofER editor | Published 09/8/2008 | Endodontic Articles 9 | Unrated
M.Venturi, G. Pasquantonio, M. Falconi & L. Breschi.
Private Practice, Bologna, Italy,Private Practice, Rome, Italy.
Department of S.A.U. & F.A.L., University of Bologna, Bologna,  Italy.
Department of Science and Society, University of Cassino, Cassino (FR), Italy.


Aim.
This study evaluated the temperature change within gutta-percha during the vertical compaction technique performed with a System-B Heat Source.

Conclusions.
This study demonstrated the thermal changes in guttapercha that occur during the vertical compaction technique by means of a System-B Heat Source. The use of a thermostatic bath distinguished this study from previous reports. The null hypothesis was rejected as the use of the System- B Heat Source (set at 250 8C) in thin canals revealed that the heating of the apical gutta-percha was inconsistent and that the compaction was performed usually at body temperature. Moreover, at the CEJ, the use of the heating device revealed that increases of outer surface temperature on the root was compatible with the periradicular tissues.
» Inflammatory response to different endodontic irrigating solutions
By JofER editor | Published 09/6/2008 | Endodontic Articles 9 | Unrated
M. Tanomaru Filho, M. R. Leonardo, L. A. B. Silva, F. F. Anibal & L. H. Faccioli.
Department of Endodontics, School of Dentistry of Araraquara, University of the State of Sao Paulo, Araraquara, SP, Brazil.
Department of Clinical Pediatrics, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
School of Pharmaceutical Science, University of Sao Paulo, Ribeirao Preto, SP, Brazil.


Aim.
The aim of this study was to evaluate the inflammatory response to irrigating solutions injected into the peritoneal cavity of mice.

Conclusions.
In this study, a 0.5% sodium hypochlorite solution caused irritating tissue reactions and showed higher inflammatory responses. Two percent chlorhexidine digluconate was biocompatible, suggesting that it can be an alternative or a complement to sodium hypochlorite during irrigation.
» An in vitro evaluation of four materials as barriers to coronal microleakage in root-filled teeth
By JofER editor | Published 09/5/2008 | Endodontic Articles 9 | Unrated
A. A. Zaia, R. Nakagawa, I. De Quadros, B. P. F. A. Gomes, C. C. R. Ferraz, F. B.Teixeira & F. J. Souza-Filho
Department of Restorative Dentistry, Dental School of Piracicaba, Piracicaba, Sao Paulo, Brazil.

Aim.
To assess the ability of IRM, Coltosol, Vidrion R and Scotch Bond to seal the pulp chamber following root-canal treatment.

Conclusions.
None of the materials were able to prevent microleakage in all specimens. Vidrion R and Scotch Bond demonstrated the poorest results when used as barriers to coronal microleakage, whilst IRM and Coltosol were significantly better in preventing microleakage.


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