Wear Properties of Conventional and High-Translucent Zirconia-Based Materials

• Published in: Materials Vol. 15; no. 20; p. 7324
• Main Authors: De Angelis, Francesco, Buonvivere, Matteo, Sorrentino, Edoardo, Rondoni, Giuseppe Daniele, D'Arcangelo, Camillo
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 20.10.2022; MDPI
• Subjects: 3 mol% yttria-stabilized tetragonal zirconia polycrystal; 4 mol% yttria partially stabilized zirconia; 5 mol% yttria partially stabilized zirconia; Aesthetics; Alloys; Analysis; Cusps; gold alloy; Gold alloys; Investigations; Partial stabilization; Partially stabilized zirconia; Polycrystals; Prostheses; Sintering; Software; Statistical analysis; Tetragonal zirconia; Tetragonal zirconia polycrystals; Variance analysis; wear; Wear resistance; Yttria-stabilized zirconia; Yttrium oxide; Zirconium dioxide; Zirconium oxide; Italy; United States > US; Japan; Germany; gold alloy; wear; 5 mol% yttria partially stabilized zirconia; 4 mol% yttria partially stabilized zirconia; 3 mol% yttria-stabilized tetragonal zirconia polycrystal
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15207324

This study investigated the two-body wear resistance of a first generation 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), a second generation 3Y-TZP, a third generation 4 mol% yttria partially stabilized zirconia (4Y-PSZ), a 5 mol% yttria partially stabilized zirconia (5Y-PSZ), and a type III gold alloy (Aurocast 8), performed using opposing antagonistic cusps made out of the same material. Eight cylindrical specimens were prepared for each material (n = 8) for a total of forty specimens (N = 40). Conical cusps were fabricated for each material. Each cylinder−cusp pair was arranged inside a two-axis chewing simulator over up to 360,000 loading cycles. The wear resistance was analyzed by measuring the vertical substance loss (mm) and the volume loss (mm3). The antagonist wear (mm) was recorded before and after the wear test to evaluate the linear difference. Statistical analysis was performed using one-way analysis of variance (ANOVA); multiple comparisons were performed according to Tukey’s method. No statistically significant differences (p > 0.05) among the first generation 3Y-TZP, second generation 3Y-TZP, and 4Y-PSZ wear were found. 5Y-PSZ showed statistically significant higher wear compared to other the zirconias. Aurocast 8 displayed the highest values in terms of vertical wear, antagonist cusp wear, and volumetric loss. Although still not statistically comparable, the wear behavior of the latest 5Y-PSZ was the closest to the widely recognized gold standard represented by the type III gold alloy.