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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 14
Endodontic Articles 14

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» Long-term survival of primary root canal treatment carried out in a dental teaching hospital
By JofER editor | Published 01/21/2009 | Endodontic Articles 14 | Unrated
G. S. P. Cheung & T. K. Chan
Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong.

Aim.
This study aimed to examine clinically and radiographically the survival of primary root canal treatment completed in a dental teaching hospital between 10 and 20 years previously.

Conclusions.
There was a nonlinear decline in the cumulative survival probability of primary root canal treatment. Tooth type, preoperative periapical status and type of post and final restoration significantly affected the long-term survival of the treated teeth.
» Chemical and antimicrobial properties of calcium hydroxide mixed with irrigating solutions
By JofER editor | Published 01/13/2009 | Endodontic Articles 14 | Unrated
S. Haenni, P. R. Schmidlin, B. Mueller, B. Sener & M. Zehnder
Division of Endodontology, Department of Preventive Dentistry, Cariology, and Periodontology, Center for Dental Medicine, University of Zurich, Zurich, Switzerland.
Swiss Federal Institute for Environmental Science and Technology (EAWAG), Kastanienbaum, Switzerland.
Swiss Federal Institute of Technology (ETH), Limnological Research Center, Kastanienbaum, Switzerland.


Aim.
Chemical and antimicrobial effects of paste-like suspensions of calcium hydroxide (Ca(OH)2) powder with chlorhexidine (CHx), sodium hypochlorite (NaOCl) or iodine potassium iodide (IPI) solutions were tested and compared to conventional Ca(OH)2/ saline paste.

Conclusions.
  1. The ability to raise the pH in root dentine over time was maintained when Ca(OH)2 powder was mixed with aqueous solutions of IPI, NaOCl or CHx digluconate.
  2. In paste-like suspensions, Ca(OH)2 powder reduced the immediate antimicrobial efficacy of CHx. No synergistic effects were recorded between Ca(OH)2 and IPI or NaOCl.
  3. Under the conditions of this study, mixing Ca(OH)2 powder with the irrigating solutions did not provide an increased antimicrobial effect compared to a conventional Ca(OH)2/saline medication.
» ProTaper rotary root canal preparation: assessment of torque and force in relation to canal anatomy
By JofER editor | Published 01/12/2009 | Endodontic Articles 14 | Unrated
O. A. Peters, C. I. Peters, K. Schonenberger & F. Barbakow
Endodontic Division, Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, USA.
Endodontic Department, University of The Pacific Dental School, San Francisco, USA.
Division of Endodontology, Department of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Switzerland.


Aim.
To investigate physical parameters for ProTaper nickel-titanium (NiTi) rotary instruments whilst preparing curved canals in maxillary molars in vitro.

Conclusions.
Whilst high forces were used in some cases, no ProTaper instrument fractured when a patent glide path was present. There were significant positive correlations between canal geometry and physical parameters during shaping.
» ProTaper rotary root canal preparation: effects of canal anatomy on final shape analysed by micro CT
By JofER editor | Published 01/12/2009 | Endodontic Articles 14 | Unrated
O. A. Peters, C. I. Peters, K. Schonenberger & F. Barbakow
Endodontic Division, Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, USA.
Endodontic Department, University of The Pacific Dental School, San Francisco, USA.
Division of Endodontology, Department of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Switzerland.


Aim.
To evaluate the relative performance of ProTaper nickel-titanium (Ni-Ti) instruments shaping root canals of varying preoperative canal geometry.

Conclusions.
Canals in maxillary molars were prepared in vitro using ProTaper instruments without major procedural errors. These instruments may be more effective in shaping narrow canals than wider, immature ones.
» Biocompatibility of dental materials used in contemporary endodontic therapy: a review. Part 2. Root-canal filling materials
By JofER editor | Published 01/12/2009 | Endodontic Articles 14 | Unrated
C. H. J. Hauman & R. M. Love
Departments of Oral Rehabilitation and Stomatology, School of Dentistry, University of Otago, Dunedin, New Zealand.

Root-canal-filling materials are either placed directly onto vital periapical tissues or may leach through dentine. The tissue response to these materials therefore becomes important and may influence the outcome of endodontic treatment. This paper is a review of the biocompatibility of contemporary orthograde and retrograde root-canal-filling materials.


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