Abstract
The subject of this paper was to conduct an in vitro study of the coronal leakage after root canal filling and post space preparation. One hundred single-rooted human teeth had their crowns removed and the canals prepared and filled by the lateral condensation technique with gutta-percha points and the sealers CRCS and Endofill (a Grossman cement). After post space preparation, the remainder of the filling was protected or not with 1mm of a plug of the following materials: Coltosol, Super Bonder (cyanoacrylate-ester), CRCS and Endofill. After 24 hours in saline, the specimens were immersed in a 2% methylene blue solution in a vacuum environment for 24 hours. The teeth were then sectioned longitudinally, leakage was evaluated linearly and the obtained data were submitted to the Kruskal-Wallis test. The results with the two sealers studied were similar between themselves and worse (p<0.01) than the groups with a protector plug. The statistical analysis ordered the experimental groups from the best to the worst in the following way: a - Endofill-Super Bonder, CRCS-Super Bonder, CRCS-CRCS; b - Endofill-Endofill; c - Endofill-Coltosol, CRCS-Coltosol; d - Endofill, CRCS.
Highlights
The sealing property of root canal fillings is a factor that can influence the result after root canal treatment[13]
Numerous investigations studied the root canal filling materials, techniques of filling and variables introduced in the filling techniques, in order to discover what procedures improve their sealing property[4,5,7,8,9,14]
The canals were filled by the lateral condensation technique with guttapercha points and the sealers CRCS (Hygienic, Rio de Janeiro, Brazil) and Endofill (Dentsply, Petrópolis, Brazil), a Grossman cement
Summary
The sealing property of root canal fillings is a factor that can influence the result after root canal treatment[13]. An efficient apical filling can hinder the communication between the root canal and periapical tissues. Several in vitro experiments demonstrated that some microorganisms can penetrate the coronal portion of the root canal fillings in depth, reaching the apical region in variable numbers of cases and time[16,18]. These observations motivated the development of some in vivo investigations, whose object was to observe if these in vitro occurrences could be detected in vivo. It was observed that the kind of sealer can influence the number of these occurrences[6]
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