Sulfate-Reducing Bacteria: Biofilm Formation and Corrosive Activity in Endodontic Files

Table 2

Distribution of the samples in relation to the methodological applications of microbiological evaluation.

Sample	Immersion time (days)	Replica of original culture	SRB growth after reimmersion in culture medium	Replica of reimmersion culture
UEF-3	445	Negative	Not performed	Not performed
UEF-4	452	Positive	Positive	Positive
UEF-2	459	Negative	Positive	Positive
UEF-1	459	Negative	Reduction of culture medium	Negative