“…The collagen-based materials with identical mass were introduced in the culture mediums of Vascular Cell Basal Medium (ATCC PCS–100030) with HUVEC viable cells. After 6 h, 24 h, and respectively 48 h, the solid materials were pull out from de mediums, and the numbers of viable cells were quantified using the MTT method [ 38 , 42 , 43 , 44 , 45 ]. All determinations have been done in plates of 96 wells, in triplicate, each determination being performed for 3 times.…”