Schlafer S, et al. – Researchers desired to know whether extracellular DNA (eDNA) was part of the matrix in biofilms grown in situ in the absence of sucrose and whether treatment with DNase dispersed biofilms grown for 2.5, 5, 7.5, 16.5, or 24 h. They found the involvement of eDNA in dental biofilm formation and its importance for biofilm stability in the earliest stages.