The Experts below are selected from a list of 1578 Experts worldwide ranked by ideXlab platform
Hideo Matsumura - One of the best experts on this subject based on the ideXlab platform.
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Effect of Luting Agent type on fracture loads of implant-supported ceramic premolar prostheses.
Dental materials journal, 2020Co-Authors: Yuta Moriya, Futoshi Komine, Junichi Honda, Kosuke Kusaba, Jin Kitani, Hideo MatsumuraAbstract:To investigate the effect of Luting Agent type on fracture loads of implant-supported ceramic prostheses in premolar region. Ninety-nine implant-abutment complexes were divided into three different implant-supported prostheses: monolithic yttria-partially stabilized zirconia (Y-PSZ) restorations (MPZ specimens), porcelain layered on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations (PLZ specimens), and monolithic lithium disilicate ceramic restorations (MLD specimens). Implant-supported prostheses were luted with adhesive resin Luting Agent (RLA), glass ionomer cement (GIC), or zinc phosphate cement (ZPC). For MPZ and MLD specimens, fracture loads were significantly higher for RLA group than for GIC and ZPC groups. For PLZ specimens, fracture loads did not significantly differ in relation to Luting Agent. Fracture loads were significantly higher for MPZ specimens than for other test specimens, regardless of Luting Agent. Use of an adhesive resin Luting Agent is recommended for placement of premolar implant-supported monolithic Y-PSZ and lithium disilicate ceramic prostheses.
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effect of a silane and phosphate functional monomer on shear bond strength of a resin based Luting Agent to lithium disilicate ceramic and quartz materials
Journal of Oral Science, 2018Co-Authors: Serina Taguchi, Futoshi Komine, Kei Kubochi, Ryosuke Fushiki, Fumiaki Kimura, Hideo MatsumuraAbstract:This study examined the effect of silane and phosphate functional monomer on bond strengths between a resin-based Luting Agent joined to a lithium disilicate ceramic (IPS e.max) and silica (quartz) materials. The e.max and quartz specimens were assigned to 6 groups with different priming/bonding Agents, namely, Clearfil Porcelain Bond Activator, Clearfil Photo Bond, Clearfil Photo Bond Universal with Clearfil Porcelain Bond Activator, Clearfil Photo Bond Catalyst with Clearfil Porcelain Bond Activator, Clearfil Photo Bond with Clearfil Porcelain Bond Activator, and unprimed. The corresponding specimens were bonded by using a resin-based Luting Agent (Panavia V5). Shear bond strengths were determined before and after 5,000 thermocycles. For both the e.max and quartz specimens, the Clearfil Photo Bond Universal with Clearfil Porcelain Bond Activator group had the highest pre- and post-thermocycling bond strength values. Combined use of silane in the acidic environment of a phosphate functional monomer and initiators enhances bond strength of a resin-based Luting Agent to e.max ceramic and quartz materials.
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effect of priming Agents on shear bond strengths of resin based Luting Agents to a translucent zirconia material
Journal of Prosthodontic Research, 2017Co-Authors: Shogo Yagawa, Futoshi Komine, Kei Kubochi, Ryosuke Fushiki, Fumiaki Kimura, Hideo MatsumuraAbstract:Abstract Purpose The purpose of the present study was to evaluate the effect of priming Agents and artificial aging with thermocycling on shear bond strengths of two resin-based Luting Agents to a translucent zirconia material. Methods A total of 308 pairs of translucent zirconia disk specimens were divided into seven treatment groups: Alloy Primer (ALP), Clearfil Ceramic Primer Plus (CCP), Meta Fast Bonding Liner (MFB), MR. bond (MRB), Super-Bond PZ Primer Liquid B (PZB), V-Primer (VPR), and an unprimed group (UP). The specimens in each group were bonded with Panavia V5 Universal (UNI) and Opaque shade (OPA). Shear bond strengths (n = 11 each) were tested before and after 5000 thermocycles. The data were analyzed with the Kruskal–Wallis test and the Steel–Dwass test. Results For both 0 and 5000 thermocycles, the ALP (47.8 and 41.5 MPa, respectively) and CCP (45.8 and 42.3 MPa, respectively) groups showed significantly higher bond strengths than other groups in the UNI Luting Agent. For the OPA Luting Agent, CCP group (45.8 MPa) exhibited the highest pre-thermocycling bond strength in all groups. The ALP (32.4 MPa) and CCP (36.5 MPa) groups had significantly higher post-thermocycling shear bond strengths than other groups. In several groups, the shear bond strengths of the UNI Luting Agent were significantly higher than those of the OPA Luting Agent before and after thermocycling. Conclusions Application of priming Agents containing hydrophobic phosphate monomer (MDP) yielded the durable bond strengths of resin-based Luting Agents to a translucent zirconia material.
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effect of silane and phosphate primers on the adhesive performance of atri n butylborane initiated Luting Agent bonded to zirconia
Dental Materials Journal, 2014Co-Authors: Yusuke Oba, Takaya Ishii, Hiroyasu Koizumi, Daisuke Nakayama, Nobutaka Akazawa, Hideo MatsumuraAbstract:The purpose of this study was to evaluate the effects of primers on the bond strength and durability of an acrylic resin Luting Agent bonded to zirconia. Disk specimens were fabricated from zirconia partially stabilized with yttrium oxide. The disks were primed with one of the following materials: Alloy Primer (AP), Ceramic Primer (CP), Liquid A of the Porcelain Liner M (PLM-A), Liquid B of Porcelain Liner M (PLM-B), Porcelain Liner M (PLM-A+PLM-B), Monobond Plus (MP), and mixture of AP and PLM-B. The specimens were bonded with a tri-n-butylborane (TBB)-initiated Luting Agent. The shear bond strengths were determined both before and after thermocycling. The results were statistically analyzed with a non-parametric procedure. The highest post-thermocycling bond strength was generated from the groups primed with MP, CP, and AP. It can be concluded that the application of three phosphate primers is recommended for bonding the zirconia with the TBB-initiated Luting Agent.
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Effects of triazine dithione and hydrophobic phosphate monomers on bonding to Ag-Pd-Cu-Au alloy and titanium with a methacrylic resin-based Luting Agent.
The journal of adhesive dentistry, 2010Co-Authors: Hiroyasu Koizumi, Koji Naito, Takaya Ishii, Takayuki Yoneyama, Naomi Tanoue, Hideo MatsumuraAbstract:PURPOSE: The purpose of the current study was to evaluate the effects of thione and phosphate functional monomers on bond strength and durability of a methacrylic resin Luting Agent joined to silver-palladium based alloy and titanium.\n\nMATERIALS AND METHODS: Disk specimens of two different sizes (10 mm and 8 mm in diameter by 2.5 mm thickness) were prepared from silver-palladium-copper-gold (Ag-Pd-Cu-Au) alloy and titanium. The specimens were ground with abrasive paper, and divided into four groups based on the following conditions: 1) unprimed control; 2) priming with Alloy Primer (thione and phosphate); 3) priming with Estenia Opaque Primer (phosphate); and 4) priming with VPrimer (thione). The disks were bonded with tri-n-butylborane (TBB)-initiated resin, and shear bond strengths were determined both before and after thermocycling.\n\nRESULTS: The Alloy Primer and V-Primer Agents containing a triazine dithione monomer (VTD) bonded the Ag-Pd-Cu-Au alloy, whereas the Alloy Primer and Estenia Opaque Primer Agents containing a hydrophobic phosphate monomer (MDP) bonded titanium. The reduction in bond strength after 20,000 thermocycles was not remarkable for the two groups (Alloy Primer and Ag-Pd-Cu-Au alloy; V-Primer and Ag-Pd-Cu-Au alloy).\n\nCONCLUSION: The thione monomer was effective in bonding the Ag-Pd-Cu-Au alloy, whereas the phosphate monomer was useful for bonding titanium. The thione did not interfere with the bonding of MDP to titanium, and MDP did not negatively affect bonding of VTD to the Ag-Pd-Cu-Au alloy. The combinations of two thione primers and the Ag-Pd-Cu- Au alloy exhibited the best adhesive performance within the limitations of the current experiment.
Mitsuru Atsuta - One of the best experts on this subject based on the ideXlab platform.
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influence of surface characteristics of four silica based machinable ceramics on flexural strength and bond strength of a dual curing resin Luting Agent
Journal of Adhesive Dentistry, 2007Co-Authors: Keiichi Yoshida, Xiangfeng Meng, Kohji Kamada, Mitsuru AtsutaAbstract:PURPOSE The aim of the present study was to evaluate the crystalline phase and microstructure of 4 commercial machinable ceramic blocks--Cerec Vitablocs Mark II (Vita), ProCAD (Ivoclar/Vivadent), GN-I (GC), and GNCeram (GC)--and compare flexural strength and shear bond strength between a dual-curing resin Luting Agent and the ceramics treated with a silane coupling Agent. MATERIALS AND METHODS Specimens were examined using scanning electron microscopy/energy-dispersive x-ray spectroscopy, and x-ray diffractometry. Three-point bending tests were performed with polished specimens 20 mm long, 4 mm wide, and 1.2 mm thick. Two differently shaped specimens for each of the 4 machinable ceramics were treated with a silane coupling Agent. The specimens were then cemented together with a dual-curing resin Luting Agent. Half of the specimens were stored in water at 37 degrees C for 24 h and the other half were thermocycled 20,000 times. RESULTS Chemical composition, crystalline phase, and crystallinity were significantly different between brands. The Vitablocs Mark II material had the significantly lowest flexural strength (101.7 +/- 15.3 MPa), while the GNCeram material had the highest (174.8 +/- 10.3 MPa). The use of a silane coupling Agent yielded high shear bond strength after 20,000 thermocycles (Vitablocs Mark II: 37.7 +/- 3.7 MPa, ProCAD: 41.2 +/- 3.1 MPa, GNCeram: 50.2 +/- 2.1 MPa), except with the GN-I material (23.9 +/- 4.4 MPa). CONCLUSION It appeared that crystal distribution and particle size of leucite crystal, not crystallinity, in the feldspar glass matrix of silica-based machinable ceramics might influence the flexural strength and efficacy of a silane coupling Agent in bonding between a dual-curing resin Luting Agent and machinable ceramics.
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effects of alumina blasting and adhesive primers on bonding between resin Luting Agent and zirconia ceramics
Dental Materials Journal, 2006Co-Authors: Yukiko Tsuo, Keiichi Yoshida, Mitsuru AtsutaAbstract:This study evaluated the effect of alumina-blasting and three commercial adhesive primers on the shear bond strength of a dual-cured resin Luting Agent to zirconia ceramics. Two different-sized zirconia ceramic specimens were treated with or without alumina-blasting and then treated with one of three adhesive primers. Subsequently, specimens were cemented together with Linkmax HV (GC). Half of the specimens were stored in water at 37°C for 24 hours and the other half thermocycled 10,000 times before shear bond strength testing. For groups treated with either alumina-blasting or primer, shear bond strength significantly decreased after thermal cycling. For groups treated with both alumina-blasting and one of the three primers, there were no significant differences in shear bond strength before and after thermal cycling (p<0.05). It was thus concluded that the application of each of the three adhesive primers following alumina-blasting was effective for strong bonding of resin Luting Agent to zirconia ceramics.
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effectiveness of two liquid silane primers on bonding sintered feldspathic porcelain with a dual cured composite Luting Agent
Journal of Oral Rehabilitation, 2004Co-Authors: T Nogami, Naomi Tanoue, Mitsuru Atsuta, Hideo MatsumuraAbstract:summary The purpose of the current study was to evaluate the effect of two-component ceramic primers on the bond strength of a composite material joined to a sintered porcelain material. Two sizes of porcelain discs (VMK 68; 10 and 8 mm in diameter by 2·5 mm thick) were ground (No. 1000 SiC), and surface-conditioned using one of the following systems: (i) unprimed, (ii) Liquid A of the Porcelain Liner M material (PLM-A), (iii) Liquid B of Porcelain Liner M (PLM-B), (iv) Liquids A and B of Porcelain Liner M (PLM-AB), (v) Liquid A of the Tokuso Ceramics Primer material (TCP-A), (vi) Liquid B of Tokuso Ceramics Primer (TCP-B) and (vii) Liquids A and B of Tokuso Ceramics Primer (TCP-AB). All specimens were bonded with the Bistite II dual-cured composite Luting Agent, and shear bond strengths were determined both after 24 h immersion in water and after subsequent thermocycling (4–60 °C, 1 min each, 20 000 cycles). Of the seven groups assessed, two groups (PLM-AB and TCP-AB) showed the greatest bond strength both before (30·7 MPa for PLM-AB and 29·7 MPa for TCP-AB) and after (19·7 MPa for PLM-AB and 22·4 MPa for TCP-AB) thermocycling (P 0·05). It can be concluded that both of the acid-catalysed two-liquid ceramic primers showed superior bonding to the unhydrolysed single-liquid silane Agents (PLM-B and TCP-A) when the feldspathic porcelain was bonded with the Bistite II Luting composite.
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a study on cytochrome c oxidoreductase for bonding a tri n butylborane initiated Luting Agent to dentin
Journal of Biomedical Materials Research, 1999Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, N Baba, Mitsuru AtsutaAbstract:The purpose of this study was to investigate the effectiveness of cytochrome c, an oxidoreductase, in terms of initiation of polymerization in dentin bonding. The efficacy of experimental dentin primers was evaluated via the bonding of a Luting Agent to dentin. The eight primers evaluated were cytochrome c aqueous solutions, four with 35 wt% 2-hydroxyethyl methacrylate (HEMA) and four without. The concentrations of cytochrome c in the primers were 0, 1, 10, and 100 μmol/g. The Luting Agent (Super-Bond C&B) consisted of methyl methacrylate (MMA), 4-methacryloyloxyethyl trimellitate anhydride (4-META), and tri-n-butylborane (TBB) initiator. Bovine dentin surfaces were flattened, etched with an aqueous solution of 10 wt% phosphoric acid, primed, and then bonded with stainless steel rods. After 1-day immersion in water, tensile testing revealed that the bond strength was influenced by the application of cytochrome c and HEMA. The maximum bond strength of 24.6 MPa was recorded with aqueous HEMA primer containing 10 μmol/g cytochrome c. This bonding technique, combining oxidoreductase with Super-Bond C&B, may potentially be applied for seating resin-bonded restorations. © 1999 John Wiley & Sons, Inc. J Biomed Mater Res (Appl Biomater) 48: 697–699, 1999
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adhesive bonding to dentin with iron ii perchlorate primers and a tri n butylborane initiated Luting Agent
Dental Materials, 1998Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, Takuo Tanaka, Mitsuru AtsutaAbstract:Abstract Objectives . This study was conducted to measure the tensile bond strength of a resin to dentin when the dentin was primed with iron (II) perchlorate modified aqueous 2-hydroxyethyl methacrylate (HEMA) or an iron (II) perchlorate modified commercial self-etching primer (ED primer, Kuraray Co.). Methods . Bovine dentin surfaces were ground flat and each specimen underwent one of the following two treatments: (1) priming with 2.0×10 −6 to 5.0×10 −4 mol/g iron (II) perchlorate in aqueous HEMA solutions after etching with 10wt% phosphoric acid; (2) priming with self-etching primers containing 4.0×10 −7 to 2.0×10 −4 mol/g iron (II) perchlorate. Each specimen was then bonded to a stainless-steel rod with a Luting Agent (MMA–TBB resin) consisting of methyl methacrylate (MMA), poly(methyl methacrylate) (PMMA), and tri- n -butylborane (TBB) initiator. Tensile strengths of the bonded tooth specimens were then determined after 1 day immersion in water. Results were analyzed using ANOVA and Duncan's new multiple range test ( p Results . Tensile testing revealed the maximum mean bond strengths (22.5 MPa) when the dentin was primed with 2.0×10 −4 mol/g iron (II) perchlorate after etching with 10wt% phosphoric acid aqueous solution. The highest level of bond strength with self-etching primer (19.6 MPa) was achieved using 1.0×10 −4 mol/g iron (II) perchlorate. Significance . These bonding techniques, combining the use of iron (II) perchlorate modified HEMA primers with MMA–TBB resin, are potentially applicable for seating resin-bonded restorations.
Keiichi Yoshida - One of the best experts on this subject based on the ideXlab platform.
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effect of elapsed time after air abrasion on bond strength of Luting Agent to cad cam resin blocks
Journal of Oral Science, 2019Co-Authors: Rana Asano, Keiichi Yoshida, Shiho Otake, Kosuke Nozaki, Hiroyuki MiuraAbstract:This experiment assessed the effect of elapsed time between air abrasion and bonding on tensile bond strength (TBS) between computer-aided design/computer-aided manufacturing (CAD/CAM) composite resin blocks and Luting Agents. Specimens were divided into eight groups classified by block type (Estelite Block or HC Block), elapsed time after air abrasion (none [D0] or 1 week [D7]), Luting Agent type (Estecem [ESC] or Rely X Ultimate [RLU]), and polymerization condition (chemical cured [CC] or light cured [LC]). In the CC+ESC group, TBS was significantly higher at D0 than at D7. There was also a significant difference between blocks in all groups except the LC+ESC group. Scanning electron microscopy and atomic force microscopy were used to observe the surfaces of blocks after air abrasion and indicated that blocks absorbed water in air with elapsed time, which affected TBS between CAD/CAM composite resin blocks and Luting Agents.
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influence of surface characteristics of four silica based machinable ceramics on flexural strength and bond strength of a dual curing resin Luting Agent
Journal of Adhesive Dentistry, 2007Co-Authors: Keiichi Yoshida, Xiangfeng Meng, Kohji Kamada, Mitsuru AtsutaAbstract:PURPOSE The aim of the present study was to evaluate the crystalline phase and microstructure of 4 commercial machinable ceramic blocks--Cerec Vitablocs Mark II (Vita), ProCAD (Ivoclar/Vivadent), GN-I (GC), and GNCeram (GC)--and compare flexural strength and shear bond strength between a dual-curing resin Luting Agent and the ceramics treated with a silane coupling Agent. MATERIALS AND METHODS Specimens were examined using scanning electron microscopy/energy-dispersive x-ray spectroscopy, and x-ray diffractometry. Three-point bending tests were performed with polished specimens 20 mm long, 4 mm wide, and 1.2 mm thick. Two differently shaped specimens for each of the 4 machinable ceramics were treated with a silane coupling Agent. The specimens were then cemented together with a dual-curing resin Luting Agent. Half of the specimens were stored in water at 37 degrees C for 24 h and the other half were thermocycled 20,000 times. RESULTS Chemical composition, crystalline phase, and crystallinity were significantly different between brands. The Vitablocs Mark II material had the significantly lowest flexural strength (101.7 +/- 15.3 MPa), while the GNCeram material had the highest (174.8 +/- 10.3 MPa). The use of a silane coupling Agent yielded high shear bond strength after 20,000 thermocycles (Vitablocs Mark II: 37.7 +/- 3.7 MPa, ProCAD: 41.2 +/- 3.1 MPa, GNCeram: 50.2 +/- 2.1 MPa), except with the GN-I material (23.9 +/- 4.4 MPa). CONCLUSION It appeared that crystal distribution and particle size of leucite crystal, not crystallinity, in the feldspar glass matrix of silica-based machinable ceramics might influence the flexural strength and efficacy of a silane coupling Agent in bonding between a dual-curing resin Luting Agent and machinable ceramics.
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effects of alumina blasting and adhesive primers on bonding between resin Luting Agent and zirconia ceramics
Dental Materials Journal, 2006Co-Authors: Yukiko Tsuo, Keiichi Yoshida, Mitsuru AtsutaAbstract:This study evaluated the effect of alumina-blasting and three commercial adhesive primers on the shear bond strength of a dual-cured resin Luting Agent to zirconia ceramics. Two different-sized zirconia ceramic specimens were treated with or without alumina-blasting and then treated with one of three adhesive primers. Subsequently, specimens were cemented together with Linkmax HV (GC). Half of the specimens were stored in water at 37°C for 24 hours and the other half thermocycled 10,000 times before shear bond strength testing. For groups treated with either alumina-blasting or primer, shear bond strength significantly decreased after thermal cycling. For groups treated with both alumina-blasting and one of the three primers, there were no significant differences in shear bond strength before and after thermal cycling (p<0.05). It was thus concluded that the application of each of the three adhesive primers following alumina-blasting was effective for strong bonding of resin Luting Agent to zirconia ceramics.
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a study on cytochrome c oxidoreductase for bonding a tri n butylborane initiated Luting Agent to dentin
Journal of Biomedical Materials Research, 1999Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, N Baba, Mitsuru AtsutaAbstract:The purpose of this study was to investigate the effectiveness of cytochrome c, an oxidoreductase, in terms of initiation of polymerization in dentin bonding. The efficacy of experimental dentin primers was evaluated via the bonding of a Luting Agent to dentin. The eight primers evaluated were cytochrome c aqueous solutions, four with 35 wt% 2-hydroxyethyl methacrylate (HEMA) and four without. The concentrations of cytochrome c in the primers were 0, 1, 10, and 100 μmol/g. The Luting Agent (Super-Bond C&B) consisted of methyl methacrylate (MMA), 4-methacryloyloxyethyl trimellitate anhydride (4-META), and tri-n-butylborane (TBB) initiator. Bovine dentin surfaces were flattened, etched with an aqueous solution of 10 wt% phosphoric acid, primed, and then bonded with stainless steel rods. After 1-day immersion in water, tensile testing revealed that the bond strength was influenced by the application of cytochrome c and HEMA. The maximum bond strength of 24.6 MPa was recorded with aqueous HEMA primer containing 10 μmol/g cytochrome c. This bonding technique, combining oxidoreductase with Super-Bond C&B, may potentially be applied for seating resin-bonded restorations. © 1999 John Wiley & Sons, Inc. J Biomed Mater Res (Appl Biomater) 48: 697–699, 1999
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adhesive bonding to dentin with iron ii perchlorate primers and a tri n butylborane initiated Luting Agent
Dental Materials, 1998Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, Takuo Tanaka, Mitsuru AtsutaAbstract:Abstract Objectives . This study was conducted to measure the tensile bond strength of a resin to dentin when the dentin was primed with iron (II) perchlorate modified aqueous 2-hydroxyethyl methacrylate (HEMA) or an iron (II) perchlorate modified commercial self-etching primer (ED primer, Kuraray Co.). Methods . Bovine dentin surfaces were ground flat and each specimen underwent one of the following two treatments: (1) priming with 2.0×10 −6 to 5.0×10 −4 mol/g iron (II) perchlorate in aqueous HEMA solutions after etching with 10wt% phosphoric acid; (2) priming with self-etching primers containing 4.0×10 −7 to 2.0×10 −4 mol/g iron (II) perchlorate. Each specimen was then bonded to a stainless-steel rod with a Luting Agent (MMA–TBB resin) consisting of methyl methacrylate (MMA), poly(methyl methacrylate) (PMMA), and tri- n -butylborane (TBB) initiator. Tensile strengths of the bonded tooth specimens were then determined after 1 day immersion in water. Results were analyzed using ANOVA and Duncan's new multiple range test ( p Results . Tensile testing revealed the maximum mean bond strengths (22.5 MPa) when the dentin was primed with 2.0×10 −4 mol/g iron (II) perchlorate after etching with 10wt% phosphoric acid aqueous solution. The highest level of bond strength with self-etching primer (19.6 MPa) was achieved using 1.0×10 −4 mol/g iron (II) perchlorate. Significance . These bonding techniques, combining the use of iron (II) perchlorate modified HEMA primers with MMA–TBB resin, are potentially applicable for seating resin-bonded restorations.
Koichi Shinkai - One of the best experts on this subject based on the ideXlab platform.
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the application of the er cr ysgg laser surface treatment to cad cam resin ceramic blocks to improve their bonding to the resin Luting Agent
Lasers in Dental Science, 2021Co-Authors: Pakorn Chuenjit, Koichi ShinkaiAbstract:The purpose of this study was to evaluate the effect of Er,Cr:YSGG laser surface treatment on the bonding of CAD/CAM resin ceramic blocks to a resin Luting Agent using various irradiation parameters. Eleven groups (n = 10) comprising CAD/CAM resin ceramic plates that underwent various surface treatment methods were used as follows: one control group (no treatment: C), one airborne particle abrasion group (AA), and nine Er,Cr:YSGG laser irradiation groups (L). These groups were exposed to various intensities (1.00, 1.25, and 1.50 W) and frequencies (15, 20, and 25 Hz) of the laser. The shear bond strength (SBS) between the CAD/CAM resin ceramic plate and resin Luting Agent with a failure mode analysis following the SBS test, surface roughness, and surface energy of the CAD/CAM resin ceramic plates was determined. The surface-treated specimens and the representative debonded surfaces of specimens were observed via scanning electron microscopy. The surface treatments significantly influenced the SBS, surface energy, and surface roughness. Group L (1.25 W–20 Hz) exhibited a significantly higher SBS than group C, but not group AA. Furthermore, the specimens in the L groups (1.25 W–15 Hz, 1.25 W–20 Hz, 1.50 W–15 Hz, 1.50 W–20 Hz, and 1.00 W–15 Hz) presented significantly higher surface roughness than those in groups C and AA. No significant difference in surface energy was observed among the L1.00–15, L1.00–20, C, and AA groups. The surface treatment of the CAD/CAM resin ceramic using Er,Cr:YSGG laser irradiation (1.25 W and 20 Hz) proved useful in obtaining a high bond strength between the block and resin Luting Agent, similar to that observed using the airborne particle abrasion method.
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effect of various surface treatments on the bond strength of resin Luting Agent and the surface roughness and surface energy of cad cam materials
Dental Materials Journal, 2021Co-Authors: Pakorn Chuenjit, Masaya Suzuki, Koichi ShinkaiAbstract:The aim of this study was to examine the effect of various surface treatments on the bond strength of a resin Luting Agent and the surface roughness and surface energy of computer-aided design and computer-aided manufacturing (CAD/CAM) materials. Four types of CAD/CAM blocks (Shofu Block HC: BHC; GC Cerasmart: CER; VITA Enamic: ENA; and Lava Ultimate: LAV) were used. All blocks were randomly divided into eight groups based on the surface treatment as follows: no surface treatment (C), airborne-particle abrasion (AA), hydrofluoric acid etching (HA), silane coupling Agent application (SL), AA/SL, HA/SL, AA/HA, and AA/HA/SL. The microtensile bond strength (µTBS), surface roughness and surface energy were measured. Three-way ANOVA revealed that all surface treatments significantly influenced the µTBS between the resin Luting Agent and all types of CAD/CAM materials; however, the effect of each surface treatment on surface roughness and energy was dependent on the CAD/CAM materials.
Yohsuke Taira - One of the best experts on this subject based on the ideXlab platform.
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a study on cytochrome c oxidoreductase for bonding a tri n butylborane initiated Luting Agent to dentin
Journal of Biomedical Materials Research, 1999Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, N Baba, Mitsuru AtsutaAbstract:The purpose of this study was to investigate the effectiveness of cytochrome c, an oxidoreductase, in terms of initiation of polymerization in dentin bonding. The efficacy of experimental dentin primers was evaluated via the bonding of a Luting Agent to dentin. The eight primers evaluated were cytochrome c aqueous solutions, four with 35 wt% 2-hydroxyethyl methacrylate (HEMA) and four without. The concentrations of cytochrome c in the primers were 0, 1, 10, and 100 μmol/g. The Luting Agent (Super-Bond C&B) consisted of methyl methacrylate (MMA), 4-methacryloyloxyethyl trimellitate anhydride (4-META), and tri-n-butylborane (TBB) initiator. Bovine dentin surfaces were flattened, etched with an aqueous solution of 10 wt% phosphoric acid, primed, and then bonded with stainless steel rods. After 1-day immersion in water, tensile testing revealed that the bond strength was influenced by the application of cytochrome c and HEMA. The maximum bond strength of 24.6 MPa was recorded with aqueous HEMA primer containing 10 μmol/g cytochrome c. This bonding technique, combining oxidoreductase with Super-Bond C&B, may potentially be applied for seating resin-bonded restorations. © 1999 John Wiley & Sons, Inc. J Biomed Mater Res (Appl Biomater) 48: 697–699, 1999
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adhesive bonding to dentin with iron ii perchlorate primers and a tri n butylborane initiated Luting Agent
Dental Materials, 1998Co-Authors: Yohsuke Taira, Hideo Matsumura, Keiichi Yoshida, Takuo Tanaka, Mitsuru AtsutaAbstract:Abstract Objectives . This study was conducted to measure the tensile bond strength of a resin to dentin when the dentin was primed with iron (II) perchlorate modified aqueous 2-hydroxyethyl methacrylate (HEMA) or an iron (II) perchlorate modified commercial self-etching primer (ED primer, Kuraray Co.). Methods . Bovine dentin surfaces were ground flat and each specimen underwent one of the following two treatments: (1) priming with 2.0×10 −6 to 5.0×10 −4 mol/g iron (II) perchlorate in aqueous HEMA solutions after etching with 10wt% phosphoric acid; (2) priming with self-etching primers containing 4.0×10 −7 to 2.0×10 −4 mol/g iron (II) perchlorate. Each specimen was then bonded to a stainless-steel rod with a Luting Agent (MMA–TBB resin) consisting of methyl methacrylate (MMA), poly(methyl methacrylate) (PMMA), and tri- n -butylborane (TBB) initiator. Tensile strengths of the bonded tooth specimens were then determined after 1 day immersion in water. Results were analyzed using ANOVA and Duncan's new multiple range test ( p Results . Tensile testing revealed the maximum mean bond strengths (22.5 MPa) when the dentin was primed with 2.0×10 −4 mol/g iron (II) perchlorate after etching with 10wt% phosphoric acid aqueous solution. The highest level of bond strength with self-etching primer (19.6 MPa) was achieved using 1.0×10 −4 mol/g iron (II) perchlorate. Significance . These bonding techniques, combining the use of iron (II) perchlorate modified HEMA primers with MMA–TBB resin, are potentially applicable for seating resin-bonded restorations.
