scholarly journals Microstructural Properties and Surface Properties of a New Resin Composite Employing Structural Color Technology

2021 ◽  
Vol 30 (1) ◽  
pp. 7-12
Author(s):  
Mayumi Maesako ◽  
Takafumi Kishimoto ◽  
Taku Horie ◽  
Miki Suzuki ◽  
Kazuho Inoue ◽  
...  
Keyword(s):  
Surface Properties ◽  
Resin Composite ◽  
Structural Color ◽  
Microstructural Properties ◽  
Color Technology

scholarly journals Effects of ionizing radiation on surface properties of current restorative dental materials

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
Débora Michelle Gonçalves de Amorim ◽  
Aretha Heitor Veríssimo ◽  
Anne Kaline Claudino Ribeiro ◽  
Rodrigo Othávio de Assunção e Souza ◽  
Isauremi Vieira de Assunção ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Surface Properties ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Contact Angles ◽  
Glass Ionomer ◽  
Post Radiation ◽  
Restorative Dental Materials ◽  
Ionomer Cement

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

scholarly journals Surface Properties of Resin Composite Materials Relative to Biofilm Formation

2007 ◽  
Vol 26 (5) ◽  
pp. 613-622 ◽  
Author(s):  
Masahiro ONO ◽  
Toru NIKAIDO ◽  
Masaomi IKEDA ◽  
Susumu IMAI ◽  
Nobuhiro HANADA ◽  
...  
Keyword(s):  
Composite Materials ◽  
Surface Properties ◽  
Biofilm Formation ◽  
Resin Composite

Flexural Properties and Polished Surface Characteristics of a Structural Colored Resin Composite

2021 ◽  
Author(s):  
K Mizutani ◽  
R Ishii ◽  
T Takamizawa ◽  
S Shibasaki ◽  
H Kurokawa ◽  
...  
Keyword(s):  
Surface Properties ◽  
Resin Composite ◽  
Surface Characteristics ◽  
The Other ◽  
Polished Surface ◽  
Flexural Properties ◽  
Strong Positive Correlation ◽  
Resin Composites ◽  
Diamond Bur ◽  
Flexible Disk

SUMMARY Objective: The aim of this study was to determine the flexural properties and surface characteristics of a structural colored resin composite after different finishing and polishing methods, in comparison to those of conventional resin composites. Methods and Materials: A structural color resin composite, Omnichroma (OM, Tokuyama Corp, Chiyoda City, Tokyo, Japan), and two comparison resin composites, Filtek Supreme Ultra (FS, 3M, St Paul, MN, USA) and Tetric EvoCeram (TE, Ivoclar Vivadent, Schaan, Liechtenstein), were used. The flexural properties of the resin composites were determined in accordance with the ISO 4049 specifications. For surface properties, 70 polymerized specimens of each resin composite were prepared and divided into seven groups of 10. Surface roughness (Sa), gloss (GU), and surface free energy (SFE) were investigated after the following finishing and polishing methods. Three groups of specimens were finished with a superfine-grit diamond bur (SFD), and three with a tungsten carbide bur (TCB). After finishing, one of the two remaining groups was polished with a one-step silicone point (CMP), and the other with an aluminum oxide flexible disk (SSD). A group ground with SiC 320-grit was set as a baseline. Results: The average flexural strength ranged from 116.6 to 142.3 MPa in the following order with significant differences between each value: FS &gt; TE &gt; OM. The average E ranged from 6.8 to 13.2 GPa in the following order with significant differences between each value: FS &gt; TE &gt; OM. The average R ranged from 0.77 to 1.01 MJ/mm3 in the following order: OM &gt; FS &gt; TE. The Sa values of the OM groups polished with CMP and SSD were found to be significantly lower than those of the other resin composites, regardless of the finishing method. The GU values appeared to be dependent on the material and the finishing method used. The OM specimens polished with SSD showed significantly higher GU values than those polished with CMP. Most of the resin composites polished with SSD demonstrated significantly higher γS values compared to the other groups. Extremely strong negative correlations between Sa and GU in the combined data from the three resin composites and each resin composite and between Sa and γS in the OM specimens were observed; GU showed a strong positive correlation with γS in the same material. Conclusion: These findings indicate that both flexural and surface properties are material dependent. Furthermore, the different finishing and polishing methods used in this study were observed to affect the Sa, GU, and SFE of the resin composites.

Nine prophylactic polishing pastes: impact on discoloration, gloss, and surface properties of a CAD/CAM resin composite

2018 ◽  
Vol 23 (1) ◽  
pp. 327-335 ◽  
Author(s):  
Anja Liebermann ◽  
Sebastian Spintzyk ◽  
Marcel Reymus ◽  
Ernst Schweizer ◽  
Bogna Stawarczyk
Keyword(s):  
Surface Properties ◽  
Resin Composite ◽  
Cad Cam

Structural Color Technology for High Pixel Density Image Sensors

2021 ◽  
Vol 41 (8) ◽  
pp. 0823010
Author(s):  
陈沁 Chen Qin ◽  
文龙 Wen Long ◽  
杨先光 Yang Xianguang ◽  
李宝军 Li Baojun
Keyword(s):  
Image Sensors ◽  
Structural Color ◽  
Color Technology ◽  
Density Image

scholarly journals Surface Response of Fluorine Polymer-Incorporated Resin Composites to Cariogenic Biofilm Adherence

2008 ◽  
Vol 74 (5) ◽  
pp. 1428-1435 ◽  
Author(s):  
Mariko Gyo ◽  
Toru Nikaido ◽  
Koichi Okada ◽  
Junichi Yamauchi ◽  
Junji Tagami ◽  
...  
Keyword(s):  
Surface Properties ◽  
Biofilm Formation ◽  
Driving Forces ◽  
Resin Composite ◽  
Contact Angles ◽  
Biofilm Reactor ◽  
Resin Composites ◽  
Oral Biofilm ◽  
Water Contact ◽  
Pure Resin

ABSTRACT Experimental resin composites with incorporated polytetrafluoroethylene (PTFE) particles were developed, which theoretically could improve the surface properties of the materials, including the inhibition of bacterial adherence. To assess the surface properties in relation to biofilm formation and detachment, 23.1% (wt/wt) linear PTFE particles (FL-30) and cross-linked PTFE particles (FC-30) were incorporated into pure resin composites. Pure PTFE plates and pure resin composites without PTFE (F-0) were used as control specimens. Sucrose-dependent Streptococcus mutans biofilms were formed on the specimen blocks inside an oral biofilm reactor for various time periods and analyzed with or without application of driving forces. In addition, water contact angles and surface roughness were measured. The water contact angles of FL-30 (61.2°) and FC-30 (65.8°) were larger than that of F-0 (48.5°). The largest contact angle (107°) was detected on pure PTFE plates. However, the surfaces of FL-30, FC-30, and pure PTFE plates were rougher than that of F-0. Although the surface properties of the materials differed in terms of contact angles and roughness, these factors seemed not to affect biofilm formation on the surfaces within 5 h. Pure PTFE plates harbored almost the same amounts of biofilm as F-0. However, when a very strong driving force was applied, it was clear that there were significantly smaller amounts of biofilms retained on pure PTFE plates, which showed contact angles much higher than those of the other materials. Hydrophobicity of the resin composite was improved by incorporation of PTFE fillers. However, surface resistance against biofilm formation was not improved.

scholarly journals Color adjustment potential of single-shade resin composite to various-shade human teeth: Effect of structural color phenomenon

2021 ◽  
Author(s):  
Shun KOBAYASHI ◽  
Masatoshi NAKAJIMA ◽  
Kiyoka FURUSAWA ◽  
Antonin TICHY ◽  
Keiichi HOSAKA ◽  
...  
Keyword(s):  
Resin Composite ◽  
Structural Color ◽  
Human Teeth
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