In vitro cyclic fatigue and hydrothermal aging lifetime assessment of yttria-stabilized zirconia dental ceramics

Wei, Chenyu; Gong, Xiaoqi; Xie, Chenyang; Chen, Z.X.; Li, S.B.; Grémillard, Laurent

doi:10.1016/j.jeurceramsoc.2020.04.016

Cited by 6 publications

(2 citation statements)

References 51 publications

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“…The effects of aging of zirconia crowns produced by either SM or AM could be different in each group because the content of alumina capable of stabilizing oxygen vacancies in the polycrystalline structure was different for each group of the tested zirconia materials. 32 …”

Section: Discussionmentioning

confidence: 99%

Evaluation of intaglio surface trueness, wear, and fracture resistance of zirconia crown under simulated mastication: a comparative analysis between subtractive and additive manufacturing

2022

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PURPOSE This in-vitro analysis aimed to compare the intaglio trueness, the antagonist’s wear volume loss, and fracture load of various single-unit zirconia prostheses fabricated by different manufacturing techniques. MATERIALS AND METHODS Zirconia crowns were prepared into four different groups (n = 14 per group) according to the manufacturing techniques and generations of the materials. The intaglio surface trueness (root-mean-square estimates, RMS) of the crown was measured at the marginal, axial, occlusal, and inner surface areas. Half of the specimens were artificially aged in the chewing simulator with 120,000 cycles, and the antagonist’s volume loss after aging was calculated. The fracture load for each crown group was measured before and after hydrothermal aging. The intaglio trueness was evaluated with Welch’s ANOVA and the antagonist’s volume loss was assessed by the Kruskal-Wallis tests. The effects of manufacturing and aging on the fracture resistance of the tested zirconia crowns were determined by two-way ANOVA. RESULTS The trueness analysis of the crown intaglio surfaces showed surface deviation (RMS) within 50 µm, regardless of the manufacturing methods ( P = .053). After simulated mastication, no significant differences in the volume loss of the antagonists were observed among the zirconia groups ( P = .946). The manufacturing methods and simulated chewing had statistically significant effects on the fracture resistance ( P < .001). CONCLUSION The intaglio surface trueness, fracture resistance, and antagonist’s wear volume of the additively manufactured 3Y-TZP crown were clinically acceptable, as compared with those of the 4Y- or 5Y-PSZ crowns produced by subtractive milling.

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Section: Discussionmentioning

confidence: 99%

Evaluation of intaglio surface trueness, wear, and fracture resistance of zirconia crown under simulated mastication: a comparative analysis between subtractive and additive manufacturing

2022

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“…The respective figures in air and steam at various temperatures are illustrated in Figs. 5.22, 5.23, 5.24, 5.25, 5.26, 5.27, 5.28 and 5.29. The time dependent fiber strength will be controlled by surface defects resulting from oxidation and is given by Eq.…”

Section: Damage In Sic/sicmentioning

confidence: 97%

Strengthening (Softening)

Pelleg

2021

Structural Integrity

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In static deformation, one of the work hardening occurs among other strengthening mechanisms when a material (mainly in metals and alloys) is strained beyond the yield point. An increasing stress is required to produce additional plastic deformation and the metal apparently becomes stronger and more difficult to deform. Dislocation activity is associated with hardening via pinning and hindering their motion. Grain boundaries are obstacles to dislocation motion by which they harden ceramics. Hardening in alumina, magnesia, pure zirconia, partially stabilized zirconia, SiC, B 4 C and Si 3 N 4 is discussed in this section. Also presented is in this section is the hardening of C/siC, Al/SiC and SiC/SiC composites. Dislocation motion by glide or slip, and the pinning by loops is considered. S-N fatigue data in some of the materials indicated above is discussed. Sand blasting improves surface properties of some of the listed substances. Fractured surface of B 4 C showed twin formation during deformation by SEM and TEM.

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