Effect of storage conditions on mechanical properties of resin composite blanks for CAD/CAM crowns

Hibino, Y.; Nagasawa, Y.; Eda, Yoshikazu; Shigeta, H.; Nakajima, Hiroshi

doi:10.4012/dmj.2019-202

Cited by 12 publications

(5 citation statements)

References 41 publications

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“…As shown in Table 2 , MP had rather stable anti-staining performance in all staining solutions, although it showed a larger color change than CXU. Both Bis-MEPP and UDMA employed in the resin matrix of this material are hydrophobic monomers; Bis-MEPP is considered a rigid monomer which is more hydrophobic compared with UDMA [ 37 , 38 ]. MP was the only material containing Bis-MEPP in this study, so the high resistance to discoloration and low water sorption of MP may be related to this component.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Color Stability, Water Sorption, and Solubility of Current Resin Composites

et al. 2022

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This study aims to assess the color stability, water sorption, and solubility of 11 resin composites as commercially available dental products. Twenty samples (10 mm in diameter and 2 mm in thickness) of each material were fabricated using a customized silicone mold, followed by immersion in each of curry, coffee, wine, and distilled water for 28 days (n = 5). Baseline shade and color changes (ΔE) were measured using a reflection spectrophotometer. The CIE L*, a*, b* system was used to evaluate the color changes. Five samples of each resin composite were applied to test water sorption and solubility according to ISO 4049:2009. As a result, the ∆E values were significantly influenced by each of the three factors (composition of material, solution, time) and the interactions between them (p < 0.001). Highest resistance to discoloration was achieved by Ceram.X One Universal (CXU), followed by Magnafill Putty (MP). Generally, microhybrid composites showed fewer color changes than nanohybrid composites and giomers. DX. Universal and Filtek Z350 XT showed the highest ΔE values in all colorants. All materials tested in this study fulfilled the criteria of ISO 4049:2009; CXU and MP had the lowest water sorption and solubility. The Pearson test showed statistically significant positive correlations between water sorption and ΔE and between solubility and ΔE.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the Color Stability, Water Sorption, and Solubility of Current Resin Composites

et al. 2022

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“…Several studies demonstrated that water storage and thermocycling reduce the flexural strength and fracture toughness of Cerasmart and Vita Enamic [26,55,56]. However, some reports have found no significant difference in the fracture strengths of Cerasmart and Vita Enamic when subjected to water storage, thermocycling [57], and fatigue loading [55]. These inconsistent results might be due to different aging protocols, such as the number of thermal cycles and fatigue loading.…”

Section: IVmentioning

confidence: 99%

Fracture resistance and fracture modes in endodontically treated maxillary premolars restored using different CAD-CAM onlays

Suksawat,

Angwaravong,

Angwarawong

2023

J Prosthodont Res

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To examine the fracture resistance and fracture modes of endodontically treated teeth (ETT) restored using onlays of different materials fabricated using computer-aided design and computer-aided manufacturing (CAD-CAM). Methods: Sixty maxillary first premolars were randomly assigned to six groups (n=10). The first group comprised intact teeth (INT). The remaining premolars were prepared for mesio-occluso-distal cavity and root canal treatments. Group 2 was treated using polymer-reinforced zinc oxide-eugenol intermediate restorative material (IRM). Groups 3−6 were core build-up, prepared for onlay, and restored using resin nanoceramic (Cerasmart [CER]), polymer-infiltrated ceramic networks (Vita Enamic [VE]), lithium disilicate-based ceramic (IPS e.max CAD [EM]), or translucent zirconia (Katana Zirconia UTML [KZ]). All specimens were immersed in 37 °C distilled water for 24 h. Each specimen was loaded at 45° to the long axis until failure (crosshead speed, 0.5 mm/min). Fracture loads were analyzed using one-way analysis of variance and Tukey's post-hoc test (α=0.05). Results: There were no significant differences in fracture load among the INT, CER, VE, and EM groups. The fracture load in the KZ group was significantly higher than those in the other groups (P < 0.05). Fracture load was the lowest in the IRM group (P < 0.05). The unrestorable failure rate was 70% in the KZ group and 10−30% in the other experimental groups. Conclusions: ETT restored using Cerasmart, Vita Enamic, or IPS e.max CAD onlays had fracture resistance and patterns comparable to those of intact teeth. Katana Zirconia UTML-restored ETT had the highest fracture load but also a higher unrestorable failure rate.

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“…Computer-aided design/computer-aided manufacturing (CAD/CAM) technology is developing rapidly in clinical dentistry. Dental prostheses fabricated using CAD/CAM systems have become common and considered standard treatments in daily clinical practice [1][2][3][4][5] . In this system, the prostheses are milled from blocks and discs made from zirconia, lithium disilicate, and composite resin 6,7) .…”

Section: Introductionmentioning

confidence: 99%

“…Especially, composite-resin blocks are popular in Japan because the composite-resin crowns fabricated by CAD/ CAM system have been covered by national health insurance. In April 2014, the insurance started covering composite-resin crowns fabricated by CAD/CAM systems for premolars [2][3][4][5][6]8) . Then, due to the advances in materials and technologies, insurance coverage has expanded to cover molars in December 2017 for all patients who have occlusal support by all second molars 2,4,5) .…”

Section: Introductionmentioning

confidence: 99%

Influence of toothbrush abrasion on the surface characteristics of CAD/CAM composite resin blocks with shade gradations

2023

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Crown restorations in anterior region are recommended highly color-reproductivity because of aesthetic reason. Composite resin block with several shade gradations is especially produced for anterior restorations. To clarify the durability of an aesthetic, the effect of toothbrush abrasion on surface properties was performed. Composite-resin blocks without shade gradation and a ceramic block were used as controls. All specimens were prepared using #2000 SiC paper and polished using an aluminum oxide polishing paste. Toothbrush abrasion tests were carried out for 20,000 cycles at a frequency of 2 Hz with 2.0 N load. Gloss and surface roughness were measured before and after toothbrush abrasion. The number of repetitions was set to five. It was clarified that tooth brushing caused to decrease in the gloss and to increase in the surface roughness with significant negative correlations between these results not only in composite-resin blocks without shade gradation but also in those with gradation.

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Effect of storage conditions on mechanical properties of resin composite blanks for CAD/CAM crowns

Cited by 12 publications

References 41 publications

Evaluation of the Color Stability, Water Sorption, and Solubility of Current Resin Composites

Evaluation of the Color Stability, Water Sorption, and Solubility of Current Resin Composites

Fracture resistance and fracture modes in endodontically treated maxillary premolars restored using different CAD-CAM onlays

Influence of toothbrush abrasion on the surface characteristics of CAD/CAM composite resin blocks with shade gradations

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