Table 2.

Optical density (595 nm) for a 24-hour biofilm and a 48-hour biofilm on all materials

Optical density (595 nm)	24-hour biofilm	48-hour biofilm	Background absorbance
Polyethylene	0.381	0.620	0.0924
Titanium	0.153	0.187	0.0520
Surgical stainless steel	0.051	0.099	0.0371