The effect of toothpaste and thermal aging on extrinsically stained additively manufactured zirconia: A comparative study on surface roughness and stain durability

PURPOSE: ) and stain durability of extrinsically stained additively manufactured zirconia, after brushing with different toothpastes and thermal cycling, with those of subtractively manufactured zirconia and lithium disilicate. MATERIALS AND METHODS: (α = 0.05). RESULTS: when brushed with WT (p ≤ 0.001). CONCLUSIONS: of AM-ZR was comparable to that of SM-ZR and SM-LD at all time points, in terms of the previously reported clinical acceptability threshold. The color change for all materials after aging, including two cycles of brushing with toothpaste and thermal cycling, was moderately unacceptable considering previously published thresholds.