2000
DOI: 10.1002/1097-4636(2000)53:4<304::aid-jbm4>3.0.co;2-s
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Strength and reliability of surface treated Y-TZP dental ceramics

Abstract: This work was undertaken to evaluate the effects of dental grinding and sandblasting on the biaxial flexural strength and Weibull modulus of various Y-TZP ceramics containing 3 mol% yttria. In addition, the susceptibility of pristine and mechanically treated materials to low-temperature degradation under the conditions adopted for testing the chemical solubility of dental ceramics was investigated. The results revealed that surface grinding and sandblasting exhibit a counteracting effect on the strength of Y-T… Show more

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Cited by 341 publications
(261 citation statements)
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“…One is residual surface compressive stresses which contribute to strengthening, and the other is the mechanically-induced surface flaws which cause strength degradation. Compressive stresses are formed due to t→m transformation, which increase the flexural strength of zirconia ceramics by resisting crack propagation [2,15,30,31]. However, under clinical conditions where the material is exposed to thermal and mechanical cycling in an aqueous environment over long periods, fracture initiation at lower levels of applied stress is enhanced [15].…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…One is residual surface compressive stresses which contribute to strengthening, and the other is the mechanically-induced surface flaws which cause strength degradation. Compressive stresses are formed due to t→m transformation, which increase the flexural strength of zirconia ceramics by resisting crack propagation [2,15,30,31]. However, under clinical conditions where the material is exposed to thermal and mechanical cycling in an aqueous environment over long periods, fracture initiation at lower levels of applied stress is enhanced [15].…”
Section: Discussionmentioning
confidence: 99%
“…Thus, it may result in an increase in the fracture tendency over the longer term [23,28,29]. The counteracting effects of airborne-particle abrasion on the flexural strength of Y-TZP are controversial in terms of effective power and duration of abrasion, and the role of surface flaws acting as the stress concentrators relative to the stress-induced surface compressive layer [23,30,31].…”
Section: Introductionmentioning
confidence: 99%
“…The heat treatment applied here (1200°C / 2 h) 14 was successful in bringing the monoclinic content after abrasion back to baseline values, as shown in Figure 2. The m→t phase transformation was also observed after heat treatment for a shorter time (1200°C / 10 min), 22 at a lower temperature (900°C / 1 h) 2 , or both (930°C and 910°C / 1 min) 7 , showing that transformation may occur after a given temperature is reached, regardless of the treatment time. The protocol applied in this study is known to relieve residual stresses without repairing cracks and/or scratches.…”
mentioning
confidence: 88%
“…The last-mentioned factor depends on the rate of t→m phase transformation, on abrasion severity, and on local temperatures. 2,6,26 After grinding, the flexural strength of zirconia discs was higher than that of the control group. This is probably due to the elimination of deeper flaws and to a more homogenous surface after grinding, and also to an increase in the fracture toughness of Y-TZP due to t→m phase transformation (Figure 2).…”
mentioning
confidence: 93%
“…The excellent mechanical characteristics and superior corrosion resistance in acid or base environment combined with the ability to preserve these properties at elevated temperatures render advanced ceramics extremely suitable to meet a wide range of applications including wear-resistant components [1], cutting tools [2,3], punches [4], engine parts [5], high temperature applications [6], medical and biomedical purposes [7][8][9][10][11][12], etc. Investigations are carried out to improve the properties of engineering ceramics, in particular, for the dry sliding contact situation, which is being more frequently implemented to avoid the high maintenance costs involved with lubricated applications [13].…”
Section: Introductionmentioning
confidence: 99%