JVD 2017 #2 - Apical Microleakage in Root Canals Obturated With 2 Different Endodontic Sealer Systems in Canine Teeth of Dogs Flashcards
Authors?
Chad Lothamer
C. Snyder, S. Goldschmidt, J. Soukup
What are the 3 components of the endodontic triad?
Preparation, sterilization, obturation
What was performed in the study?
standard root canal of extracted canine teeth in dogs, sealed with guttaflow or AH+ and evaluated for sealing ability with a dye leakage test.
What were the findings comparing the sealing ability of the 2 sealers?
No significant difference in the prevalence of microleakage or the magnitude of penetration
What problems with the methodology were encountered?
- Clearing method is finnicky and require diligent monitoring durint the demineralizing phase; excessive demineralization can rapidly occur resulting in dissolution of the sample.
- completely dissolved 6 AH+ teeth and 3 guttaflow teeth out of 20 in each group
What is the benefit of AH+ over the older sealer AH26?
Less formaldehyde release on setting (AH+ is still cytotoxic for 4 hrs)
Formaldehyde: cytotoxic, carcinogenic, allertenic
What class of sealer does AH+ belong to?
Epoxy amide sealer
What volumetric change can be expected in AH+ on setting?
shrinkage of 1.7%
What class of sealer does Guttaflow 2 belong to?
Silicone based sealer
What volumetric change can be expected with setting fo Guttaflow 2?
Expansion by 0.2%
Which is more soluble, guttaflow 2 or AH+?
AH+ - solubility of 0.3%; guttaflow 2 has solubility of 0%
What are other methods for assessing endodontic sealer ability?
dye penetration
fluid filtration methodology
dye extraction methods
bacterial or toxin infiltration methods
