Mechanical properties of polymer-infiltrated-ceramic (sodium aluminum silicate) composites for dental restoration

Cui, Bencang; Li, Jing; Wang, Huining; Lin, Yucong; Shen, Yang; Li, Ming; Deng, Xuliang; Nan, Ce‐Wen

doi:10.1016/j.jdent.2017.05.009

Cited by 29 publications

(20 citation statements)

References 23 publications

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“…As anticipated, Enamic had higher flexural modulus and lower flexural strength compared to dispersed‐fillers RCB materials that have a higher polymeric content. This is in accordance with Cui et al., who concluded that in PICN the contribution of the network affected the flexural modulus rather than the flexural strength and that the ductility of the matrix could help explain the increase in fracture toughness …”

Section: Discussionsupporting

confidence: 92%

“…Mechanical properties are inherent characteristics of matrix and filler/network arrangement within a material, which can be optimized by the development of new fabrication processes. This is demonstrated in the high‐pressure high‐temperature PICN, in which the presence of interpenetrating networks led to positive effects on multiple mechanical properties, as well as in the dispersed‐fillers materials, in which the high temperature polymerization process enhanced the degree of conversion compared to a light curing process . It has been hypothesized that high‐pressure high‐temperature polymerization could reduce the size and number of voids, along with the internal stress present in the microstructure of PICN, which would positively impact resistance to crack formation/propagation .…”

Section: Discussionmentioning

confidence: 98%

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Fracture Toughness, Flexural Strength, and Flexural Modulus of New CAD/CAM Resin Composite Blocks

Lucsanszky

Ruse

2019

Journal of Prosthodontics

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Purpose:To determine and compare the fracture toughness, flexural strength and flexural modulus of four new, commercially available CAD/CAM resin composite blocks and one new CAD/CAM lithium disilicate glass-ceramic block, tested under dry and aged conditions. Materials and Methods: Three dispersed-fillers resin composite blocks, CERAS-MART, KZR-CAD-HR2, and CAMouflage NOW, one polymer-infiltrated ceramic network resin composite block, Enamic, along with Obsidian, a lithium disilicate glass-ceramic block, were characterized. Fracture toughness was determined through the notchless triangular prism specimen test, while flexural strength and flexural modulus were determined by three-point bend testing. Blocks were cut and ground to obtain (6 × 6 × 6 × 12) mm prisms and 10:1 span-to-thickness ratio bars (n = 25/group); half of the resin composite specimens were aged in 37°C distilled water for 30 days before testing. Fractured surfaces were characterized using a scanning electron microscope. Results were analyzed using Weibull statistics and two-way ANOVA, followed by Scheffé multiple means comparisons (α = 0.05). Results: With regards to fracture toughness, KZR stood out among resin composites with a dry value of 1.37 MPa·m 1/2 ; this was significantly affected by ageing, while the fracture toughness of the other dispersed-fillers resin composite blocks was not. Obsidian had the highest fracture toughness at 1.47 MPa·m 1/2 . With regards to flexural strength, Obsidian > CERASMART = KZR > CAMouflage > Enamic. The flexural strength of the resin composites was lowered by ageing. Enamic was found to have the highest flexural modulus among the resin composites (33.02 GPa), but its value was significantly lower than that of Obsidian (76.46 GPa); flexural modulus was not affected by ageing. Conclusion: There was a significant difference in flexural strength between the materials, but not unanimously in flexural modulus and fracture toughness. The tested resin composite block materials had inferior flexural strength, flexural modulus and fracture toughness compared with the tested lithium disilicate glass-ceramic block (Obsidian). Enamic, the polymer infiltrated ceramic network material, had a significantly higher flexural modulus than the dispersed-fillers materials. Ageing had a deleterious impact on the flexural strength of all RCB, while its effect on the flexural modulus was insignificant. The selection of any restorative material requires a thorough analysis of its advantages and limitations to inform the clinical decision in a case-by-case approach.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 98%

Fracture Toughness, Flexural Strength, and Flexural Modulus of New CAD/CAM Resin Composite Blocks

Lucsanszky

Ruse

2019

Journal of Prosthodontics

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“…With the increase of hydroxyapatite content, the flexural strength of PICN shows a general decreasing trend. The flexural strength values were found very similar to that of commercial CAD/ CAM block Vita Enamic [8,9]. The flexural strength decreases significantly with the addition of 1 wt% hydroxyapatite.…”

Section: Resultssupporting

confidence: 68%

Mechanical and biocompatible properties of polymer-infiltrated-ceramic-network materials for dental restoration

et al. 2020

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Dental restorative materials with high mechanical properties and biocompatible performances are promising. In this work, polymer-infiltrated-ceramic-network materials (PICNs) were fabricated via infiltrating polymerizable monomers into porous ceramic networks and incorporated with hydroxyapatite nano-powders. Our results revealed that the flexural strength can be enhanced up to 157.32 MPa, and elastic modulus and Vickers hardness can be achieved up to 19.4 and 1.31 GPa, respectively, which are comparable with the commercial computer-aided design and computer-aided manufacturing (CAD/CAM) blocks. Additionally, the adhesion and spreading of rat bone marrow mesenchymal stem cells (rBMSCs) on the surface of such materials can be improved by adding hydroxyapatite, which results in good biocompatibility. Such PICNs are potential applicants for their application in the dental restoration.

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“…Resin composite is considered preferable for patients who may exhibit grinding or bruxing behavior when a restoration is in contact with natural enamel 4,5) . In addition, resin composite materials may offer significant advantages related to their machinability and especially intra-oral reparability which is much simpler than ceramic repair 6,7) .…”

Section: Introductionmentioning

confidence: 99%

Early bond strengths of 4-META/MMA-TBB resin cements to CAD/CAM resin composite

et al. 2019

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The purpose of this study was to evaluate the early tensile bond strengths of three different resin cements; Super Bond C&B (conventional and quick type) and ResiCem to a CAD/CAM composite block. A CAD/CAM composite block (Shofu Block HC) was ground and silanized according to the manufacturers' instructions before cementation. A conventional tensile bond strength test (Ø: 4 mm) was performed 10 min, 1 h and 24 h after bonding. Super Bond C&B (quick type) showed the highest bond strength at 24 h. However, results of a three-point bend test showed the mechanical properties were weaker for the Super Bond C&B cements compared with composite cement, Resicem. The 4-META/MMA-TBB resin is a suitable resin cement to bond to a CAD/CAM composite block.

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Mechanical properties of polymer-infiltrated-ceramic (sodium aluminum silicate) composites for dental restoration

Cited by 29 publications

References 23 publications

Fracture Toughness, Flexural Strength, and Flexural Modulus of New CAD/CAM Resin Composite Blocks

Fracture Toughness, Flexural Strength, and Flexural Modulus of New CAD/CAM Resin Composite Blocks

Mechanical and biocompatible properties of polymer-infiltrated-ceramic-network materials for dental restoration

Early bond strengths of 4-META/MMA-TBB resin cements to CAD/CAM resin composite

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