The crisis related to the COVID 19 pandemic caused an increase in nickel prices on
the global markets. From this perspective, it seems promising to search for the possibilities of
effective recycling of nickel-based alloys as biomaterials. The topic of the recasting of Ni-Cr
dental alloys is currently being broadly described in the literature. Nonetheless, there are still no
conclusive results on the impact of recasting on the quality of the cast dentures. Considering the
aforementioned, for research, the effect of recasting on the wear resistance and microstructure
of NiCrMo dental alloy was investigated. The Heraenium NA alloy was used for testing.
Abrasion resistance was tested by the ball on disc method. Microstructure and wear trace were
observed using an optical microscope and a scanning electron microscope. The tests showed
a higher wear resistance of the re-casted material. The average coefficient of friction for the
initially cast alloys was 0.664, while for the remelted samples the mean value was 0.441. The
tested samples are characterised by an abrasive-adhesive wear mechanism. Piling up of the wear
tracks edges was observed – the highest for H100. For the H100 samples, a slightly lower average
hardness value (HV10) was observed – 226 compared to 233 (HV10) for the samples made from
the re-casted alloy (H0). The presence of a dendritic structure of alloys was demonstrated.
Blocky eutectic precipitations are visible against the matrix. The observed growth of
interdendritic precipitations constitute a natural barrier for the counterpart material and increases
its tribological properties. Obtained results suggest that alloy recasting does not constitute
a limitation to its use