Finally, elastomeric polymer networks were screened for cytotoxicity according to ISO10993-5 using murine fibroblast cell line L929, as described previously . Extracts were prepared in duplicate, by incubating samples of each photocured material (3 cm 2 area, thickness 0.5 mm, cut into small pieces) in 1 mL of complete growth medium (Dulbecco's Modified Eagle Medium (DMEM), containing 10%