Abstract
Objective: The aim on this study was to evaluate the coronal infiltration of restored samples with cast post cores, cemented with different types of cement. Methods: Forty-eight rooted samples extracted from humans were instrumented with rotatory system and prepared dentist’s drill wide to the confection of the molten core. The samples were divided in three experimental groups and two control groups. Group 1 was cemented with zinc phosphate cement; group 2 with glass ionomer cement, and group 3 with resin cement. The samples were assembled in a double chamber model system, and their leakage detector was the Enterococcus faecalis. The inoculation was renewed every three days during 60 days. The microleakage was daily evaluated through the observation of the culture medium regarding its turbidity. Results: Microleakage occurred in positive group. There was no microleakage in the negative group. It was detected 66, 66%, 25%, and 41, 66% of microleakage in groups 1, 2 and 3. The statistical analysis carried out by the Wilcoxon-test, revealed a considerable difference between cements, being the zinc phosphate cement the one with the worst results. Conclusion: The cementation procedure of molten metallic cores can be important to delay the contamination of teeth in need of coronal reconstruction.
Highlights
The endodontic therapy fail is related with the coronal microleakage inside the root canal [1,2,3,4,5,6,7]
The cements used in this experiment were tested according to their efficiency to block an Enterococcus faecalis culture, which is a very resistant gran-positive coccus in the oral cavity, such coccus was chosen as a biological pointer in the actual study for being constantly involved in persistent endodontic infections, it can be responsible for a great amount of endodontic failures
Ricucci et al [5] concluded that the failure of the endodontic therapy is related with coronal microleakage inside the root canal, which can be worsen whenever the removal from part of the filling material is needed for the installation of the post
Summary
The endodontic therapy fail is related with the coronal microleakage inside the root canal [1,2,3,4,5,6,7]. The relation between the quality of the coronal restoration and the filling of the root canal with the presence of periapical pathology has been evaluated [11]. Some authors concluded that the technical quality of the coronal restoration was more important than the endodontic treatment to the periapical health of the teeth endodontically treated [2,12]. Other authors emphasize that quality of the endodontic treatment is more important than the restoration quality [3,13]; in the meantime, the majority of the studies had highlighted the association of a good endodontic treatment to an adequate coronal restoration [1,3,5,7,11,14].
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