Abstract
It has been reported that Ni-Ta alloys with compositions from Ni-20wt% Ta to Ni-30wt% Ta have good and sufficient mechanical properties as dental casting alloys, when comparing with cast base metal alloys, which are commercially available.The usefulness of these alloys was proved as dental casting alloys and in clinical applications.The biocompatibility of Ni-Ta alloys and human cultuyed fibloblasts were studied by tissue culture to determine the toxicity.The morphology of cultuyed fibroblast cells in the neighbourhood of metal specimens was observed and cell numbers were counted to determine the biocompatibility of the metals and the fibroblasts.The fibroblast cells grown with Ni-20wt% Ta and Ni-30wt% Ta specimens were similar to the control, revealing a good biocompatibility.These cultured fibroblast cells were arranged closely and normally around these alloy specimens.The fibroblasts grown with Ni metal showed changes in shape and disintegration, indicating cell damage.As a conclusion, alloys with compositions from Ni-20wt% Ta to Ni-30wt% Ta can be considered useful dental-and bio-materials.
