I am planning to study the micro-push out bond strength of a root canal sealer to root canal dentin. I had come across many studies regarding various factors that affect the push-out bond strength. Variables studied were type of sealer, core material, obturation technique, tooth type, tooth portion, storage time, presence or absence of smear layer, slice thickness etc. But the taper of the prepared root canal was not investigated. I had observed practically during retreatment procedures the retention of guttapercha in root canals prepared with more tapered rotary systems is less. Will the taper of the rotary instrument affect the push-out bond strength?
well which sealer are you evaluating ? resin based, Ca(oh)2 based ?
http://www.ncbi.nlm.nih.gov/pubmed/25950117
http://www.ncbi.nlm.nih.gov/pubmed/19615650
http://www.ncbi.nlm.nih.gov/pubmed/22512406
http://www.sciencedirect.com/science/article/pii/S1687857415000402
hope these help :p good luck
Thank you Dr Rashid. I have gone through these publications. Variables studied were irrigants, obturating materials, surface treatments. Please let me know if you come across studies regarding push out bond strength variations with different tapered instruments. Thank you.
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