Effect of Aging Regimens on Resin Nanoceramic Chairside CAD/CAM Material

Ayad, Neveen M.; ArRejaie, Aws S.; Bahgat, Hala A; Baba, Nadim Z.

doi:10.1111/jopr.12408

Cited by 28 publications

(15 citation statements)

References 20 publications

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“…Though, in present study, fatigue conditions were exacerbated later and, moreover, a recent clinical trial on composite resin posterior crowns reported different kinds of complications long before 5 years of clinical use [24]. Cyclic loading and water aging are known to degrade the fracture resistance of Lava Ultimate restorations [25,26] while thermocycling has a negative influence on the final strength of a resin composite [27]. During the second phase, fatigue testing conditions were "accelerated" by increasing stepwise the load as well as the frequency of the cycles.…”

Section: Discussionmentioning

confidence: 89%

Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns

et al. 2016

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Section: Discussionmentioning

confidence: 89%

Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns

et al. 2016

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“…The present study showed that ceramic-resin composite materials have lower hardness and fracture toughness compared with glass-matrix ceramics. Al-Harbi et al reported that ULT had lower surface hardness and fracture toughness than VIT [ 30 ]. Albero et al also stated that, ENA and ULT had significantly lower Vickers hardness than MAX, VIT, and EMP in accordance with our results [ 25 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of five CAD/CAM materials by microstructural characterization and mechanical tests: a comparative in vitro study

et al. 2018

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BackgroundPolymer infiltrated ceramics and nano-ceramic resins are the new restorative materials which have been developed in order to enhance the adverse properties of glass-matrix ceramics and resin composites. The aim of the present in vitro study was to evaluate the characteristics of various CAD/CAM materials through mechanical, microstructural, and SEM analysis.MethodsFive test groups (n = 22) were formed by using the indicated CAD/CAM blocks: VITA Enamic (VITA Zahnfabrik), Lava Ultimate (3 M ESPE), IPS e.max CAD (Ivoclar Vivadent), IPS Empress CAD (Ivoclar Vivadent), and VITA Mark II (VITA Zahnfabrik). Two specimens from each test group were used for XRD and EDS analysis. Remaining samples were divided into two subgroups (n = 10). One subgroup specimens were thermocycled (5 °C to 55 °C, 30s, 10,000 cycles) whereas the other were not. All of the specimens were evaluated in terms of flexural strength, Vickers hardness, and fracture toughness. Results were statistically analyzed using two-way ANOVA, one-way ANOVA, Tukey’s HSD, and Student’s t tests (α = .05). Fractured specimens were evaluated using SEM.ResultsThe highest Vickers microhardness value was found for VITA Mark II (p < .001), however flexural strength and fracture toughness results were lowest conversely (p < .05). IPS e.max CAD was found to have the highest flexural strength (p < .001). Fracture toughness of IPS e.max CAD was also higher than other tested block materials (p < .001). Lava Ultimate and VITA Enamic’s mechanical properties were affected negatively from thermocycling (p < .05). Microhardness, flexural strength, and fracture toughness values of Lava Ultimate and VITA Enamic were found to be similar to VITA Mark II and IPS Empress CAD groups.ConclusionsIt should be realised that simulated aging process seem to affect ceramic-polymer composite materials more significantly than glass ceramics.

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“…For this purpose, wmaterials are exposed to various aging methods in dental research. The thermal cycling process is one of these methods, which imitates the intraoral conditions, as the samples are exposed to a humid environment facing temperature changes (3,31). This process affects the chemical, mechanical and physical properties of restorative materials due to the hydrolysis of the components caused by water absorption and the expansion-shrinkage caused by the hot-cold passages (33,34).…”

Section: Discussionmentioning

confidence: 99%

“…Frequent change in the oral cavity temperature can cause restorative materials to either expand or contract, which is all together lead to increasing mechanical stress and fractures that spread rapidly within the material. In the literature, there are many parameters used for aging procedures (22,23,27,31). However, there is no standard bath temperature or number of cycles for thermal cycling procedures (9).…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Storage Conditions on Mechanical Properties of CAD/CAM Restorative Materials

Atay

Sağırkaya

2019

Odovtos - Int J Dent Sc

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The aim of this study was to evaluate mechanical properties of six new-generation all-ceramic materials for CAD/CAM (Lava Ultimate [LU], VITA Mark II [VM], InCoris TZI [IC], IPS e.max CAD [EM], VITA Suprinity [VS], IPS Empress CAD [EC]) and two different provisional restoration CAD/CAM materials (Telio CAD [TC], Vita CAD-Temp [VC]) after different storage conditions. 36 bar-shaped samples of 4 mm in width and 14 mm in length with 1.2 mm thicknesses were prepared from each material group (N=288). The specimens from each material were kept under three different storage conditions (n=12): under dry conditions at room temperature; 37°C distilled water for 7 days; and 37°C distilled water for 7 days followed by 10,000 thermal cycles. All specimens were subjected to a 3-point flexural test with a crosshead speed of 1.0 mm/min. The specimens were loaded until failure. Twelve fractured specimens after the flexural test from each group were used for the Vickers hardness test (under 300 gf of loading in 15 seconds). The flexural modulus, flexural strength and Vickers hardness values were separately analyzed with two-way analysis of variance, Tukey’s multiple comparison tests at a significance level of p<0.05. There were statistically significant differences between materials and storage conditions according to flexural modulus, flexural strength and Vickers hardness values (p<0.05). The flexural strength, flexural modulus and Vickers hardness values of LU, VC, TC, VS and IC decreased after water storage followed by thermal cycling (p<0.05). The mechanical properties of provisional restoration CAD/CAM materials had showed a significantly decrease after water storage followed by thermal cycles but their mechanical properties were acceptable for fabrication of provisional restorations. The mechanical properties of VM, EC and EM were not affected by different storage conditions whereas IC and VS were affected.

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Effect of Aging Regimens on Resin Nanoceramic Chairside CAD/CAM Material

Abstract: The resin nanoceramic Lava Ultimate can be used as a durable substitute for glass-ceramic chairside CAD/CAM material.

Cited by 28 publications

References 20 publications

Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns

Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns

Evaluation of five CAD/CAM materials by microstructural characterization and mechanical tests: a comparative in vitro study

Effects of Different Storage Conditions on Mechanical Properties of CAD/CAM Restorative Materials

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