Estudio comparativo in vitro del nivel de microfiltración coronal en restauraciones provisionales que usan politetrafluoroetileno (PTFE) como espaciador a diferentes espesores

Abstract

Microleakage is considered one of the main factors associated with root canal (CR) treatment failure, it can be caused by defective coronal restorations, dental fractures, recurrent caries and lack of marginal integrity in the restoration. It is essential that the clinician performs an adequate temporary filling of the tooth during or at the end of the endodontic treatment. Endodontic spacers, such as polytetrafluoroethylene (PTFE) and cotton, are used to prevent recontamination and provide adequate temporary restoration. The objective of this study was to compare the degree of coronal microleakage in provisional Cavit restorations with a thickness of 3.5mm that use PTFE as a spacer at different thicknesses. This quantitative and experimental in vitro study was carried out in the microbiology and dentistry laboratories of the University of Cuenca. 72 lower incisors of cattle divided into 3 groups in which Teflon pellets of different thicknesses were applied and 1 cotton group were used as a control to evaluate the microleakage of E. faecalis by means of a microbial filtration model within 21 days. The results showed statistically significant differences between the groups when evaluating colony-forming units (CFUs), there were no differences between the days of filtration between the groups. In addition, it was not possible to establish a relationship between the leak days and the UFC. This study shows the superiority in the sealing capacity of PTFE when compared to cotton when used as spacers in temporary restorations.