The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Cheol-we Kim - One of the best experts on this subject based on the ideXlab platform.
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Shear bond strength between titanium alloys and Composite Resin: sandblasting versus fluoride-gel treatment.
Journal of biomedical materials research. Part B Applied biomaterials, 2003Co-Authors: Bum-soon Lim, Seok-mo Heo, Yong-keun Lee, Cheol-we KimAbstract:The aim of this study was to investigate the effect of fluoride gel treatment on the bond strength between titanium alloys and Composite Resin, and the effect of NaF solution on the bond strength of titanium alloys. Five titanium alloys and one Co-Cr-Mo alloy were tested. Surface of the alloys were treated with three different methods; SiC polishing paper (No. 2000), sandblasting (50-μm Al2O3), and commercially available acidulated phosphate fluoride gel (F− = 1.23%, pH 3.0). After treatment, surfaces of alloy were analyzed by SEM/EDXA. A cylindrical gelatin capsule was filled with a light-curable Composite Resin. The Composite Resin capsule was placed on the alloy surface after the application of bonding agent, and the Composite Resin was light cured for 30 s in four different directions. Shear bond strength was measured with the use of an Instron. Fluoride gel did not affect the surface properties of Co-Cr-Mo alloy and Ni-Ti alloy, but other titanium alloys were strongly affected. Alloys treated with the fluoride gel showed similar bond strengths to the alloys treated with sandblasting. Shear bond strength did not show a significant difference (p < 0.05) regardless of treatment time (5, 10, and 20 min) of fluoride gel. After the ultrasonic cleaning subsequent to the fluoride-gel treatment, residues of fluoride ion or any other titanium-fluoride complexes were not detected. NaF solution did not reduce the shear bond strength of titanium alloys. To enhance the bond strength of Composite Resin to titanium alloys, fluoride-gel treatment may be used as an alternative technique to the sandblasting treatment. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 64B: 38–43, 2003
Peng Xitian - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of Superabsorbent Polyacrylic Acid/Chitosan/MMT Composite Resin
Journal of Wuhan University, 2007Co-Authors: Peng XitianAbstract:The superabsorbent polyacrylic acid/chitosan/montmorillonite(PAA/CTS/MMT) Composite Resin were synthesized by solution polymerization,and its structure was characterized by FTIR.The effects of the amount of initiator,crosslinker,montmorillonite and the mass ratio of the acrylic acid and chitosan on the absorbency of Composite Resin were investigated.The results show that the highest absorbencies of Composite Resin for distilled water and saline water are 425 times and 65 times,respectively.At this point,the mass ratio of AA and CTS is 10∶1;the amount of MMT is 2%;the amount of initiator and crosslinker reaches 3.2% and 0.16%,respectively.
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synthesis of superabsorbent polyacrylic acid chitosan mmt Composite Resin
Journal of Wuhan University, 2007Co-Authors: Peng XitianAbstract:The superabsorbent polyacrylic acid/chitosan/montmorillonite(PAA/CTS/MMT) Composite Resin were synthesized by solution polymerization,and its structure was characterized by FTIR.The effects of the amount of initiator,crosslinker,montmorillonite and the mass ratio of the acrylic acid and chitosan on the absorbency of Composite Resin were investigated.The results show that the highest absorbencies of Composite Resin for distilled water and saline water are 425 times and 65 times,respectively.At this point,the mass ratio of AA and CTS is 10∶1;the amount of MMT is 2%;the amount of initiator and crosslinker reaches 3.2% and 0.16%,respectively.
J. Tagami - One of the best experts on this subject based on the ideXlab platform.
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Bonding property of Resin cement to Composite Resin crown
Dental Materials, 2015Co-Authors: O. Aramaki, Rena Takahashi, Takahiro Wada, J. TagamiAbstract:Purpose:Direct Crownsmade of a Composite Resinmaterial recently developed by 3M ESPE. These crowns maintain the coronal morphology even in an uncured state. The advantage is that the entire process of crown fabrication until cementing and delivery can be completed chairside on the same day. There has not been a detailed study on how adhesion with Resin cement is affected by bonding performed immediately after polymerization of Composite Resin. Thus, this study examined the effects of time period after crown fabrication on the bonding property. Methods and materials: This study used a combination of Composite Resin and Resin cement from the same manufacturer. The following items were used: 3M ESPE Direct Crowns with RelyX Unicem 2 Automix self-adhesive Resin cement and Kuraray Noritake Dental Estenia C&B with Panavia F 2.0. Discs of Estenia C&B and Direct Crowns were fabricated (10mm diameter and 3mm thickness). They were divided into groups with bonding performed immediately after fabrication of discs (0h-Direct Crown group and 0h-Estenia C&B group) and groups with bonding performed 48h later (48h-Direct Crown group and 48h-Estenia C&B group). Amicrotensile bond strength test was performed after bonding. Subsequently, fracture surface morphology of samples was examined by scanning electronmicroscopy. ATR-FTIR (Attenuated total reflection-Fourier transform infrared spectroscopy) analysis was performed on Direct Crowns. Results: The adhesive strength was significantly higher in the 0h-Direct Crown group (76.6± 13.4MPa) compared with the 0h-Estenia C&B group (60.9± 14.8MPa), the 48h-Direct Crown group (45.8± 9.7MPa), and the 48h-Estenia C&B group (53.7± 12.5MPa). When fracture surfaces were examined after the microtensile bond strength test, the 0h-Direct Crown group had many mixed fractures but no fracture at the interface between Composite Resin and Resin cement. The other three groups had mainly mixed fractures and fractures at the interface between Composite Resin and Resin cement. The results of ATR-FTIR analysis suggest that the degree of surface polymerization was low for Direct Crowns immediately after fabrication compared with Direct Crowns 24h later. Conclusion: The results of this study suggest that Direct Crowns are effective in clinical use with their high adhesion due to bonding immediately after fabrication.
Bum-soon Lim - One of the best experts on this subject based on the ideXlab platform.
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Shear bond strength between titanium alloys and Composite Resin: sandblasting versus fluoride-gel treatment.
Journal of biomedical materials research. Part B Applied biomaterials, 2003Co-Authors: Bum-soon Lim, Seok-mo Heo, Yong-keun Lee, Cheol-we KimAbstract:The aim of this study was to investigate the effect of fluoride gel treatment on the bond strength between titanium alloys and Composite Resin, and the effect of NaF solution on the bond strength of titanium alloys. Five titanium alloys and one Co-Cr-Mo alloy were tested. Surface of the alloys were treated with three different methods; SiC polishing paper (No. 2000), sandblasting (50-μm Al2O3), and commercially available acidulated phosphate fluoride gel (F− = 1.23%, pH 3.0). After treatment, surfaces of alloy were analyzed by SEM/EDXA. A cylindrical gelatin capsule was filled with a light-curable Composite Resin. The Composite Resin capsule was placed on the alloy surface after the application of bonding agent, and the Composite Resin was light cured for 30 s in four different directions. Shear bond strength was measured with the use of an Instron. Fluoride gel did not affect the surface properties of Co-Cr-Mo alloy and Ni-Ti alloy, but other titanium alloys were strongly affected. Alloys treated with the fluoride gel showed similar bond strengths to the alloys treated with sandblasting. Shear bond strength did not show a significant difference (p < 0.05) regardless of treatment time (5, 10, and 20 min) of fluoride gel. After the ultrasonic cleaning subsequent to the fluoride-gel treatment, residues of fluoride ion or any other titanium-fluoride complexes were not detected. NaF solution did not reduce the shear bond strength of titanium alloys. To enhance the bond strength of Composite Resin to titanium alloys, fluoride-gel treatment may be used as an alternative technique to the sandblasting treatment. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 64B: 38–43, 2003
Yang Li - One of the best experts on this subject based on the ideXlab platform.
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The clinical effect comparison of posterior dentine defect restoration with glassfiber strengthered Composite Resin post and metal post
Hainan Medical Journal, 2006Co-Authors: Yang LiAbstract:Objective The clinical effect comparison of posterior dentine defect restoration with glassfiber strengthered Composite Resin post and metal post. Methods 60 seriously destroyed first molar of 30 cases were selected and treated with glrssfiber strengthered Composite Resin post and metal post, then porcelain-fused-metal crown(PFM) was applied to restore dentine defect. The patients were called back for a visit after 3.6 and 12 months. Results 2 molars of two cases lost visits. The other 58 molars have only two fails of metal post restoration cases, while all prosthesis of glassfiben strengthened Composite Resin post required satisfactory effect without failure. Conclusions Glassfiber strengthened Composite Resin post is a better choice than metal post in posterior dentine defect restoration with benefits such As perfect color, easy operation and satisfactiory clinical effect.