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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 1
Endodontic Articles 1
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» Occlusal loading of EBA and MTA root-end fillings in a computer-controlled masticator: a scanning electron microscopic study
By JofER editor | Published 01/17/2002 | Endodontic Articles 1 | Unrated

C.I. Peters & O.A. Peters
Endodontic Division, Department of Preventive Dentistry, Cariology and Periodontology, University of Zurich, Zurich, Switzerland

Aim.
The aim of this investigation was to assess the marginal adaptation of Super-EBA (EBA) and Pro Root MTA (MTA) root-end fillings and the occurrence of microcracks in resected root-ends of extracted teeth before and after occlusal loading for a five-year equivalent period in a computer-controlled masticator.

Conclusions.
Both EBA and MTA displayed excellent marginal adaptation before masticatory loading. After loading, the amount of continuous margin for both rootend filling materials decreased slightly but was still high.

» Quantitative analysis of substance P, neurokinin A and calcitonin gene-related peptide in pulp tissue from painful and healthy human teeth
By JofER editor | Published 01/16/2002 | Endodontic Articles 1 | Unrated

L. Awawdeh, F. T. Lundy, C. Shaw, P-J. Lamey, G. J. Linden & J. G. Kennedy
Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan.
School of Dentistry, The Queen’s University of Belfast, Belfast and School of Applied Biomedical Sciences, University of Ulster, Coleraine, UK.

Aim.
The purpose of this study was to investigate the levels of substance P (SP), neurokinin A (NKA) and calcitonin gene-related peptide (CGRP) in painful and healthy human dental pulps.

Conclusions.
Elevated levels of these neuropeptides in pulps from painful teeth indicate that they may play an important role in the process of pulpal inflammation and pain. Further investigation of the association between these neuropeptides and pulpal status may help to improve our understanding of pulpal inflammation and dental pain.

» Effects of instrumentation, irrigation and dressing with calcium hydroxide on infection in pulpless teeth with periapical bone lesions
By JofER editor | Published 01/14/2002 | Endodontic Articles 1 | Unrated

L. B. Peters, A.-J. van Winkelhoff, J. F. Buijs& P. R. Wesselink
Departments of Cariology Endodontology Pedodontology, and Oral Microbiology, Academic Centre for Dentistry Amsterdam, Amsterdam, Netherlands

Aim.
The aim of this study was to evaluate the fate of microorganisms in root canals of teeth with infected pulps and periapical bone lesions with and without the use of calcium hydroxide medication.

Conclusions.
Although a calcium hydroxide paste was placed in the prepared canals, the number of positive canals had increased in the period between visits. However, the number of microorganisms had only increased to 0.93% of the original number of CFU (sample 1). It is concluded that a calcium hydroxide and sterile saline slurry limits but does not totally prevent regrowth of endodontic bacteria.

» Influence of rotational speed, torque and operator proficiency on failure of Greater Taper files
By JofER editor | Published 01/7/2002 | Endodontic Articles 1 | Unrated

G. M. Yared, F. E. Bou Dagher, P. Machtou & G. K. Kulkarni
Discipline of Endodontics and Preventive Dentistry, Faculty of Dentistry, University of Toronto, Canada.
Department of Endodontics, Dental School, Lebanese University, Lebanon.
Department of Endodontics, Dental School, University Paris 7-Denis Diderot, France.

Aim.
The purpose of this study was to evaluate the influence of rotational speed, torque, and operator experience on the incidence of locking, deformation, and separation of instruments when using a specific Ni–Ti rotary instrumentation technique in extracted human teeth.

Conclusions.
Preclinical training in the use of the GT rotary instruments when used with a crown-down technique at 150 r.p.m. was crucial in avoiding instrument separation and reducing the incidence of instrument locking and deformation.

» A protocol for polymerase chain reaction detection of Enterococcus faecalis and Enterococcus faecium from the root canal
By JofER editor | Published 01/1/2002 | Endodontic Articles 1 | Unrated

Molander A, Lundquist P, Papapanou PN, Dahlen G, Reit C.
Departments of Endodontology/Oral Diagnosis, Oral Biochemistry and Oral Microbiology, Faculty of Odontology, Göteborg University, Gothenburg, Sweden.

Aim.
The present study was set up to develop a protocol for detection of Enterococcus faecalis and Enterococcus faecium from the root canal.

Conclusions.
The present study demonstrated a good potential for using PCR technology in the detection of E. faecalis and E. faecium from root canal samples. With a high specificity the methodology was able to detect 10 cells of E. faecalis.



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