Cytotoxicity of materials was tested via extract tests according to ISO10993-5 in similar fashion to our previous works. Briefly, strips of photocured materials (area: 3 cm 2 , thickness: 0.5 mm) were cut into smaller pieces, placed in a well of a 24-well plate, and incubated in 1 ml of complete growth medium (Dulbecco's Modified Eagle Medium (DMEM), containing 10%