الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
Three dimensional stability of the filling materials is considered a critical factor for the success of the endodontic treatment.
Sealing ability of the root canal filling material is important for the prevention of the regrowth of micro-organisms and failure of root canal treatment.
Many factors can influence the sealing ability of the root canal filling material such as; the technique of filling, the type of the filling material, the type of sealer, technique of instrumentation, type of irrigant and the presence or absence of the smear layer in addition to the use of intracanal medicaments.
Proper adhesion of the filling material is considered a key factor for its proper sealing ability, this adhesion can be carried out mechanically using resin materials or chemically using glass ionomer material.
The root canal filling materials are subjected to different media which are; the serum through the apical and lateral communication with the peridontium and saliva in case of the presence of defects in the coronal restoration. Any solubility of the root canal filling materials can create enough space (leakage) which allows bacterial growth and failure of the endodontic treatment.
So that the main goal for many endodontic researches is the creation of an obturating material that can face the challenges of different media without any solubility to prevent any dimensional instability and so having a proper sealing ability so that preventing the existence of any microorganisms that can cause failure of the whole root canal treatment.