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Recent Articles
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Inflammatory response to different endodontic irrigating solutions
 | 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. |
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An in vitro evaluation of four materials as barriers to coronal microleakage in root-filled teeth
| 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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Invivo fracture of anewrubber-dam clamp
| S. Zinelis & J. Margelos
Biomaterials Laboratory, School of Dentistry, University of Athens, Athens, Greece.
Aim.
This study was carried out to investigate the reasons for fracture of a new rubberdam clamp used for the first time.
Key learning points.
- The labelling technique used to number clamps maybe implicated with catastrophic failure.
- Dentists should be aware that even new clamps can fracture.
- It is important that clamps are secured to prevent inhalation of metal fragments, should catastrophic failure occur.
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Prevalence of different periapical lesions associated with human teeth and their correlation with the presence and extension of apical external root resorption
| F.V.Vier & J. A. P. Figueiredo
Post-Graduate Programof Dentistry, ULBRA, Canoas, Brazil.
Aim.
The aim of this study was to determine the prevalence of various periapical pathologies and their association with the presence and extent of apical external inflammatory root resorption in human teeth.
Conclusions.
On the basis of our study of extracted human teeth, we conclude that:
- Cystic lesions accounted for 24.5% of chronic periapical lesions;
- The majority of chronic periapical lesions (84.3%), whether cystic (20.6%) or noncystic (63.7%), had large collections of acute inflammatory cells;
- Periforaminal and foraminal resorptions were present in 87.3 and 83.2% of roots associated with periapical lesions;
- The pattern of periforaminal resorption was independent of the pattern of foraminal resorption;
- There was no correlation between the histopathological diagnosis of the periapical lesion and the presence and extension of apical external root resorption.
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Diagnosing periapical lesions - disagreement and borderline cases
| A. Halse, O. Molven & I. Fristad
Section of Oral Radiology and Section of Endodontics, School of Dentistry, University of Bergen, Bergen, Norway.
Aim.
The aim of this paper is to present a selection of disagreement and borderline cases from a methodological study on the radiographic diagnosis of periapical disease.
Conclusion.
This presentation of difficult borderline cases illustrates the uncertainty frequently involved in radiographical decision making. In such cases, the decision: lesion or no lesion can only be made after careful analysis of the periodontal ligament space, the lamina dura, the trabecular pattern and the bone marrow spaces. |
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