Short-term and long-term release of monomers from newly developed resin-modified ceramics and composite resin CAD-CAM blocks

Mourouzis, Petros; Andreasidou, Eirini; Samanidou, Victoria F.; Tolidis, Kosmas

doi:10.1016/j.prosdent.2019.01.012

Cited by 33 publications

(27 citation statements)

References 21 publications

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“…Another limitation of this study is the unknown peak at 16 min, which is the scope of future research and could not be identified in this research due to limited evidence. Lastly, compared to other studies [5,26,35,40,41], the presented method is more time consuming, as the last monomer (Bis-GMA) was eluted at 22.5 min.…”

Section: Discussionmentioning

confidence: 97%

“…The relative errors ranged from 98% to 106% for artificial saliva standards. To the authors' knowledge, there are few articles in the literature to determine the leaching monomers from CAD/CAM materials [19,35]. However, CAD/CAM technology and CAD/CAM materials are beginning to be widely used by the dental community.…”

Section: Discussionmentioning

confidence: 99%

“…The composition of the CAD/CAM materials clearly indicates that the manufacturers have interpolated UDMA and TEGDMA as the preeminent monomer [19]. The advantages of the usage of UDMA include the lower molecular weight of the monomer and the absence of aromatic groups, properties which consecutively decrease monomer release [35]. TEGDMA is a small and agile molecule, which allows the increased conversion of unsaturated double bonds of carbon (C=C) to simple polymer, thus improving the result of polymerization.…”

Section: Discussionmentioning

confidence: 99%

“…The glass vessels were airtight closed by using a screw cap. In this way, all surfaces of the specimens could be in direct contact with the medium, ensuring more representative results [35]. All samples were kept at 37 • C. They were measured after 24 h, and 7 s, 14, 28, and 60 days.…”

Section: Application To Real Samplesmentioning

confidence: 99%

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Validation of a Simple HPLC–UV Method for the Determination of Monomers Released from Dental Resin Composites in Artificial Saliva

Diamantopoulou

Plastiras

Mourouzis

et al. 2020

MPs

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Bisphenol-A (BPA), bisphenol A glycerolate dimethacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA) are organic monomers that can be released from dental composites into the oral cavity. Over specific concentrations, they can act as endocrine disruptors or cause toxic effects. The purpose of this work is to develop and validate an analytical method to determine BPA, Bis-GMA, TEGDMA, and UDMA monomers released from synthetic dental resins in artificial saliva. The method was validated before its application to new hybrid ceramic materials used in computer-aided design and computer-aided manufacturing (CAD/CAM) restorations to determine the release of monomers in various time intervals (e.g., 24 h, and 7, 14, 30, and 60 days), both in methanolic solutions, as well as in artificial saliva. Chromatographic analysis was performed isocratically on a Perfect Sil Target ODS-3 analytical column (250 mm × 4.6 mm, 5 µm) with CH3CN/H2O, 58/42% v/v as mobile phase within 23 min. The developed method was validated in terms of selectivity, linearity, accuracy, and precision.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Application To Real Samplesmentioning

confidence: 99%

See 2 more Smart Citations

Validation of a Simple HPLC–UV Method for the Determination of Monomers Released from Dental Resin Composites in Artificial Saliva

Diamantopoulou

Plastiras

Mourouzis

et al. 2020

MPs

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“…Over the years, the mechanical properties of CAD/CAM hybrid composite blocks have improved through the alteration of the resin matrix and the incorporation of filler particles [ 3 , 4 , 5 ]. Hybrid composite blocks have different microstructures as well as variable filler contents and hence differences in their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Color Stability of Dental Reinforced CAD/CAM Hybrid Composite Blocks Compared to Regular Blocks

et al. 2020

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This study compares the color stability of dental reinforced computer-aided design/computer-aided manufacturing (CAD/CAM) hybrid composite blocks to that of regular blocks. One hundred fifty disc-type specimens (n = 15) were prepared from five sets of hybrid composite blocks (Cerasmart-200/Cerasmart-300, KZR-CAD HR/KZR-CAD HR3, Estelite Block/ Estelite-P Block, Avencia Block/Avencia-P Block, Mazic Duro/Duro Ace). The specimen color and translucency parameter (TP) were assessed using a spectrophotometer before and after immersion in staining solutions (water, 10% ethanol, simulated red wine). Changes in color (ΔE) and translucency (ΔTP) of specimens were calculated. The data were analyzed using the analysis of variance (ANOVA) and Tukey’s post hoc test (p < 0.05). Microstructural features of the hybrid composite blocks were also examined using FE-SEM. Immersion in deionized water or 10% ethanol made no significant color or translucency changes (except for Avencia-P Block); however, the simulated red wine caused significant changes to the color and translucency of almost all specimens, especially after 4 weeks of immersion. The reinforced hybrid blocks (except for Estelite-P Block and Duro Ace) showed lower color stability than corresponding regular blocks. Avencia-P Block showed significantly reduced color stability compared to Avencia Block. Even in deionized water and 10% ethanol, Avencia-P Block showed perceptible ΔE and decreased translucency. Estelite Block/ Estelite-P Block and Mazic Duro/Duro Ace showed better color stability than the other materials tested.

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Impact of erosion and aging simulation on chairside materials

Mourouzis,

Tsiveli,

Tsetseli

et al. 2023

Microscopy Res & Technique

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This study investigates the influence of acid exposure and thermocycling simulating erosion tooth wear, on the optical properties and surface roughness of chairside materials. Resin‐ceramic, lithium disilicate, premium zirconium oxide and resin composite material comprise the materials tested. To simulate the dental erosion and aging, specimens from each material were immersed in hydrochloric acid, while the thermocycling procedure included 10,000 cycles. The translucency, the color differences and the surface roughness were calculated. The materials phase composition was tested using X‐ray diffraction analysis to evaluate T‐M phase transformation. The CIEDE2000 color difference and the translucency parameter were tested different significantly among groups. Data were statistically analyzed via independent samples t‐test, and paired samples t‐test. The thermocycling procedure and the exposure to the acid solution had different effect on the surface roughness of CAD/CAM materials. The present result demonstrated the negative effect the acid exposure has on the zirconia material in terms of color difference. However, no color differences over the threshold of acceptability were recorded after the thermocycling procedure. Both polymer materials exhibit an increase of the surface roughness when they were immersed in acid but they did not display an increase in roughness when they were thermocycled.

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Short-term and long-term release of monomers from newly developed resin-modified ceramics and composite resin CAD-CAM blocks

Cited by 33 publications

References 21 publications

Validation of a Simple HPLC–UV Method for the Determination of Monomers Released from Dental Resin Composites in Artificial Saliva

Validation of a Simple HPLC–UV Method for the Determination of Monomers Released from Dental Resin Composites in Artificial Saliva

Color Stability of Dental Reinforced CAD/CAM Hybrid Composite Blocks Compared to Regular Blocks

Impact of erosion and aging simulation on chairside materials

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