Recent advances in understanding the fatigue and wear behavior of dental composites and ceramics

Kruzic, Jamie J.; Arsecularatne, J.A.; Tanaka, Carina B.; Hoffman, Mark; César, Paulo Francisco

doi:10.1016/j.jmbbm.2018.08.008

Cited by 103 publications

(83 citation statements)

References 311 publications

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“…Sliding wear tests are used in biomaterial testing [45][46][47]. Dental biomaterials are also tested in this way [2,3]. Wear sliding resistance tests of dental composites were conducted using a microtribometer (CSM Instruments SA, Peseux, Switzerland) ( Figure 2).…”

Section: Wear Sliding Testmentioning

confidence: 99%

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Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

Pieniak

Walczak

et al. 2020

Materials

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This study discusses a quantitative fatigue evaluation of polymer–ceramic composites for dental restorations, i.e., commercial material (Filtek Z550) and experimental materials Ex-nano (G), Ex-flow (G). Their evaluation is based on the following descriptors: microhardness, scratch resistance, and sliding wear. In order to reflect factors of environmental degradation conditions, thermal fatigue was simulated with a special computer-controlled device performing algorithms of thermocycling. Specimens intended for the surface strength and wear tests underwent 104 hydrothermal fatigue cycles. Thermocycling was preceded by aging, which meant immersing the specimens in artificial saliva at 37 °C for 30 days. Microhardness tests were performed with the Vickers hardness test method. The scratch test was done with a Rockwell diamond cone indenter. Sliding ball-on-disc friction tests were performed against an alumina ball in the presence of artificial saliva. A direct positive correlation was found between thermocycling fatigue and microhardness. The dominant mechanism of the wear of the experimental composites after thermocycling is the removal of fragments of the materials in the form of flakes from the friction surface (spalling). Hydrothermal fatigue is synergistic with mechanical fatigue.

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Section: Wear Sliding Testmentioning

confidence: 99%

“…In the literature, they are also often listed as light-cured polymer matrix ceramic composites (LC PMCCs). Dental materials are used, because long-term degradation processes such as fatigue, wear, and caries often create a need to repair human teeth [2]. LC PMCCs are characterized by good performance.…”

Section: Introductionmentioning

confidence: 99%

Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

Pieniak

Walczak

et al. 2020

Materials

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“…In the case of composite fillings or ceramic restorations, a major concern is directed towards shade matching [1][2][3]. Due to their highly esthetic properties, dental ceramics have been extensively used in restorative dentistry, leading to researches oriented towards the development of new classes and representative materials, as well as new techniques aimed to improving properties of the existing ceramics [4][5][6][7][8][9][10].…”

Section: Background and Aimsmentioning

confidence: 99%

Color matching of full ceramic versus metal-ceramic crowns - a spectrophotometric study

Greta

Gasparik

Colosi

et al. 2019

Medicine and Pharmacy Reports

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Background and aims. To verify the color match of metal-ceramic and full ceramic crowns, using instrumental methods. Methods. A number of 153 teeth (anterior and posterior teeth), in 62 patients, were restored with metal ceramic (MC, n=119), pressed-ceramic (PC, n=28), and zirconia-ceramic (ZC, n=6) full coverage crowns. The shade of a reference natural tooth was recorded instrumentally with a dental spectrophotometer (Vitaeasyshade Advance 4.0) in “single tooth measurement”, which provided the base color in Vita Classic (VC) and Vita 3D Master shades (3D). For verifying the outcome of the restoration “verify restoration” mode was used, and ΔE values were recorded for both VC and 3D Master shade guides. Moreover, matching symbols were also recorded (***=good, **=fair, *=poor). Descriptive statistics was performed and data were analyzed (One-sample z-Test, α=0.05) for comparison with visual thresholds in dentistry (Perceptibility Threshold – PT=1.2 and Acceptability Threshold – AT=2.7). Results. The data did not follow a normal distribution (Kolmogorov-Smirnov test, p<0.05). Recorded color difference was significantly higher than PT and AT, for all types of restorations, regardless of the coding system (p<0.05). For MC crowns in 2.52% (4.20% for 3D) of the cases the color difference was smaller than PT, in 19.32% (the same for 3D) of cases was between PT and AT, and in 78.15% (76.47% for 3D) of cases was higher than the AT. For PC crowns in 3.57% (0% for 3D) of the cases the color difference was smaller than PT, in 25% (32.14% for 3D) of cases was between PT and AT, and in 71.42% (67.85% for 3D) of cases was higher than the AT. In the case of ZC crowns none of the restorations had color difference smaller than PT, but in 16.66% of cases was between PT and AT, and in 83.33% of cases was higher than the AT, for both VC and 3D. Conclusion. Within the limitations of the study, a better color match was achieved in the case of pressed ceramic crowns, made of lithium disilicate. In most of the situations the color difference between the restoration and the reference tooth exceeded the perceptibility thresholds, but the matching was recorded as “fair” by the spectrophotometer.

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“…This seems to be because when the crack approaches the interface, the crack is much larger than the initial crack length. At this point, crack growth unstably and the chipping failure will occur catastrophically [30]. In addition, a large amount of strain energy was released during the propagation process, and the stress intensity factor at the crack tip was not sufficient for the crack penetrate the high modulus framework material [31].…”

Section: Discussionmentioning

confidence: 99%

Influence of residual thermal stresses on the edge chipping resistance of PFM and veneered zirconia structures: Experimental and FEA study

et al. 2019

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Objectives.-Chipping fractures of the veneering porcelain are frequently reported for veneered all-ceramic crowns. In the present study, the edge chipping test is used to measure the toughness and the edge chipping resistance of veneered zirconia and porcelain-fused-to-metal (PFM). The aim is to describe an edge chipping method developed with the use of a universal testing machine and to verify the accuracy of this method to determine the influence of residual thermal stresses on the chipping fracture resistance of veneering porcelain. A finite element analysis (FEA) was used to study the residual stress profiles within the veneering porcelain. Methods.-Veneered zirconia and PFM bars specimens were submitted to either a fast or a slow cooling protocol. The chipping resistances were measured using the edge chipping method. The load was applied in two different directions, in which the Vickers indenter was placed in the veneering porcelain either parallel or perpendicular to the veneer/framework interface. The mean edge chipping resistance (R eA) and fracture toughness values were analysed. R eA was calculated by dividing the critical force to cause the chip by the edge distance. K c was given by a fracture analysis that correlates the critical chipping load (Fc) regarding edge distance (d) and material toughness via K c = F c /(βd 1.5). Results.-The R eA revealed similar values (p>0.005

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Recent advances in understanding the fatigue and wear behavior of dental composites and ceramics

Cited by 103 publications

References 311 publications

Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

Color matching of full ceramic versus metal-ceramic crowns - a spectrophotometric study

Influence of residual thermal stresses on the edge chipping resistance of PFM and veneered zirconia structures: Experimental and FEA study

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