Mechanical behavior of a Y-TZP ceramic for monolithic restorations: effect of grinding and low-temperature aging

Pereira, Gabriel Kalil Rocha; Silvestri, T.; Camargo, Rosa Maria Bortolotti de; Rippe, Marília Pivetta; Amaral, Marina; Kleverlaan, Cornelis J.; Valandro, Luiz Felipe

doi:10.1016/j.msec.2016.02.049

Cited by 65 publications

(43 citation statements)

References 49 publications

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“…39,40 Although the tested Y-TZP ceramic consists of a new translucent material, and therefore alterations on microstructure and composition (that are not clearly stated by the manufacturer) may be expected in comparison to conventional Y-TZP ceramics 4 , our data support a similar performance of the tested ceramic to the ones that have been evaluated by previous studies. 15,16,17,18,19 Finally, we showed that the protocols for grinding and aging used by this study do not promote a deleterious effect on the mechanical properties of Y-TZP ceramic, regardless of the ceramic thickness. However, more studies subjecting the Y-TZP materials to drastic environments such as fatigue tests, long periods in the presence of moisture, as well as crownshape sample testing set-ups, should be conducted to support these findings.…”

Section: Discussionmentioning

confidence: 53%

“…in the material mechanical performance, which is also demonstrated by previous in vitro studies. 14,17,33 Therefore, the surface modifications due to grinding are able to cause positive or negative effects on the mechanical properties of Y-TZP materials. If the defect produced by grinding has a greater depth than the one of the compressive layer created by t-m phase transformation, it may result in higher levels of tensile stress concentration, raising the incidence of catastrophic failures.…”

Section: Discussionmentioning

confidence: 99%

“…Caution was taken to increase reproducibility and standardize wear thickness during grinding, following the grinding protocol previously described in the literature. 14,17,18 Low-temperature aging Low-Temperature Degradation (LTD) was simulated in an autoclave (Sercon HS1-0300 nº1560389/1) at 134°C, under 2 bar, over a period of 20 h, following the protocol suggested on the systematic review by Pereira et al 19 Surface analysis (Topography, Roughness and Phase transformation) SEM analysis and 3D optical profilometer analysis…”

Section: Grindingmentioning

confidence: 99%

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Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia

et al. 2017

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Monolithic restorations of Y-TZP have been recommended as a restorative alternative on prosthetic dentistry as it allows a substantial reduction of ceramic thickness, which means a greater preservation of tooth structure. However, the influence of grinding and aging when using a thinner layer of the material is unclear. This investigation aimed to evaluate and compare the effects of ceramic thickness (0.5 mm and 1.0 mm), grinding and aging (low-temperature degradation) on the mechanical behavior and surface characteristics of a full-contour Y-TZP ceramic. Y-TZP disc-shaped specimens (15 mm diameter) were manufactured with both thicknesses and randomly assigned into 4 groups considering the factors 'grinding with diamond bur' and 'aging in autoclave'. Surface topography (roughness, 3D profilometry and SEM), phase transformation, flexural strength and structural reliability (Weibull) analyses were executed. Grinding affected the surface topography, while aging did not promote any effect. An increase in m-phase content was observed after grinding and aging, although different susceptibilities were observed. Regardless of zirconia's thickness, no deleterious effect of grinding or aging on the mechanical properties was observed. Thus, in our testing assembly, reducing the thickness of the Y-TZP ceramic did not alter its response to grinding and low temperature degradation and did not impair its mechanical performance.

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Grindingmentioning

confidence: 99%

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Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia

et al. 2017

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“…As expected for a composite material, the properties are intermediate between those of ceramics and particle-filled resins. 60,61,63 The elastic modulus of these materials is in the range of 30 GPa, which is half of that reported for conventional veneering ceramics but closer to what is usually reported for dentin (15)(16)(17)(18)(19)(20). 58,63 Typical ceramic materials have a higher elastic modulus values than PICN 64 .…”

Section: Polymer Infiltrated Ceramic Network (Picns)mentioning

confidence: 63%

“…Their results indicated that some brands are not susceptible to aging while others are more prone to tretragonal-to-monoclinic (t-m) transformation. 19,20 However, more studies are needed to evaluate this ageing phenomenon, since to date there is no scientific evidence from clinical studies linking the clinical failure of dental Y-TZP with this type of ageing.…”

Section: Monolithic Zirconia Restorationsmentioning

confidence: 99%

Dental ceramics: a review of new materials and processing methods

et al. 2017

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The evolution of computerized systems for the production of dental restorations associated to the development of novel microstructures for ceramic materials has caused an important change in the clinical workflow for dentists and technicians, as well as in the treatment options offered to patients. New microstructures have also been developed by the industry in order to offer ceramic and composite materials with optimized properties, i.e., good mechanical properties, appropriate wear behavior and acceptable aesthetic characteristics. The objective of this literature review is to discuss the main advantages and disadvantages of the new ceramic systems and processing methods. The manuscript is divided in five parts: I) monolithic zirconia restorations; II) multilayered dental prostheses; III) new glass-ceramics; IV) polymer infiltrated ceramics; and V) novel processing technologies. Dental ceramics and processing technologies have evolved significantly in the past ten years, with most of the evolution being related to new microstructures and CAD-CAM methods. In addition, a trend towards the use of monolithic restorations has changed the way clinicians produce all-ceramic dental prostheses, since the more aesthetic multilayered restorations unfortunately are more prone to chipping or delamination. Composite materials processed via CAD-CAM have become an interesting option, as they have intermediate properties between ceramics and polymers and are more easily milled and polished.

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Influence of grinding parameters on phase transformation, surface roughness, and grinding cost of bioceramic partially stabilized zirconia (PSZ) using diamond grinding wheel

Khodaii

Barazandeh

Rezaei

et al. 2019

Int J Adv Manuf Technol

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Mechanical behavior of a Y-TZP ceramic for monolithic restorations: effect of grinding and low-temperature aging

Cited by 65 publications

References 49 publications

Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia

Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia

Dental ceramics: a review of new materials and processing methods

Influence of grinding parameters on phase transformation, surface roughness, and grinding cost of bioceramic partially stabilized zirconia (PSZ) using diamond grinding wheel

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