scholarly journals Detection of adherence of Enterococcus faecalis in infected dentin of extracted human teeth using confocal laser scanning microscope: An In vitro Study

2017 ◽  
Vol 9 (5) ◽  
pp. 41 ◽  
Author(s):  
G Sivadas ◽  
VSiddharth Nair ◽  
Moksha Nayak ◽  
MK Ramya ◽  
C Ganesh ◽  
...  
2013 ◽  
Vol 03 (04) ◽  
pp. 057-062
Author(s):  
Rahul Halkai ◽  
Mithra N. Hegde ◽  
Kiran Halkai

Abstract Aim: to know ability of Enterococcus faecalis invasion into root dentin. Methodology: Forty single rooted human intact teeth were selected, after access opening and canal debridement, all the samples were subjected for gamma sterilization to ensure complete absence of microorganisms, then exposed to Enterococcus faecalis broth, broth is placed with the help of micro pipette into root canal and also at the same time apical 1/3 of tooth were immersed into broth for 8 weeks, biomechanical preparation, obturation and coronal sealing done using GIC followed by examination under confocal laser scanning microscope after splitting the teeth samples into two halfs buccolingually. Results: This study shows invasion of Enterococcus faecalis upto 160 μm deep in to root dentin. Conclusion: penetration and survival of Enterococcus faecalis deep into dentin in extreme conditions may be the possible reason for persisting infection after root canal treatment.


Author(s):  
Thomas M. Jovin ◽  
Michel Robert-Nicoud ◽  
Donna J. Arndt-Jovin ◽  
Thorsten Schormann

Light microscopic techniques for visualizing biomolecules and biochemical processes in situ have become indispensable in studies concerning the structural organization of supramolecular assemblies in cells and of processes during the cell cycle, transformation, differentiation, and development. Confocal laser scanning microscopy offers a number of advantages for the in situ localization and quantitation of fluorescence labeled targets and probes: (i) rejection of interfering signals emanating from out-of-focus and adjacent structures, allowing the “optical sectioning” of the specimen and 3-D reconstruction without time consuming deconvolution; (ii) increased spatial resolution; (iii) electronic control of contrast and magnification; (iv) simultanous imaging of the specimen by optical phenomena based on incident, scattered, emitted, and transmitted light; and (v) simultanous use of different fluorescent probes and types of detectors.We currently use a confocal laser scanning microscope CLSM (Zeiss, Oberkochen) equipped with 3-laser excitation (u.v - visible) and confocal optics in the fluorescence mode, as well as a computer-controlled X-Y-Z scanning stage with 0.1 μ resolution.


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