Effects of Oral Commensal Streptococci on Invasion into Oral Epithelial Cells.

The objective of this study was to determine if the interaction between common oral commensal bacteria and oral epithelial cells would provide protective effects against the invasion of periodontopathogen . Oral epithelial OKF6/Tert cells were used in co-cultures with , , , and . The viability of OKF6/Tert cells following a bacterial challenge was evaluated by trypan blue exclusion.