scholarly journals Effect of Water Storage on Hardness and Interfacial Strength of Resin Composite Luting Agents Bonded to Surface-Treated Monolithic Zirconia

2021 ◽  
Vol 9 (7) ◽  
pp. 78
Author(s):  
Emmanouil-George Tzanakakis ◽  
Maria Dimitriadi ◽  
Ioannis Tzoutzas ◽  
Petros Koidis ◽  
Spiros Zinelis ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Resin Composite ◽  
Water Storage ◽  
Interfacial Strength ◽  
Roughness Parameters ◽  
Shear Strength Test ◽  
Effect Of Water ◽  
Luting Agents ◽  
Significant Difference ◽  
Monolithic Zirconia

Background: Durable bonding between resin composite luting agents (CLA) and zirconia is still a matter of controversy. The purpose of this study was to evaluate the effect of water storage on hardness and interfacial strength of three CLA, a non-adhesive (Multilink Automix/ML), an adhesive (Panavia F 2.0/PF) and a self-adhesive (PermaCem 2.0/PC), bonded to polished (CL) and grit-blasted (AL: 50 μm alumina, SJ: Sil-Jet + Monobond Plus silane) monolithic zirconia surfaces. Methods: CLA specimens (n = 5/cement, condition) were prepared, stored under dry conditions or immersed in water, and Vickers hardness (VH) measurements were obtained at 1 h, 24 h, 1 week and 3 weeks intervals. Optical profilometry was used to determine the roughness parameters (Sa, Sz, Sdr, Sci) of zirconia surfaces (n = 5/treatment). A shear strength test (SBS, n = 10 × 2/cement) was performed to assess the strength and fractography of the cements bonded to zirconia after isothermal water storage and thermal-cycling (TC). Results: PF demonstrated significantly lower VHN after water storage at all time intervals, PC at 1 w, 3 w and ML at 3 w. SJ and AL showed significantly higher values from CL in all roughness parameters. Weibull analysis revealed the following significance in σο ranking within the same material: AL, SJ, ALTC > SJTC, CL > CLTC (PF); SJ, SJTC, AL, ALTC > CL, CLTC (PC) and SJ, SJTC > AL > ALTC > CL, CLTC (ML). Within the same surface treatment subgroups, the significance in σo ranking was PC, ML > PF (before/after TC) for SJ; PC > PF > ML (before TC), PC, PF > ML (after TC) for AL, and PC > PF > ML (before/after TC) for CL. For the m ranking, the only significant difference within each material group was found in PC (AL > ALTC) and for the same surface treatment in AL (PC > ML). Conclusion: There are significant differences in the water plasticization susceptibility of the CLA tested; the materials with adhesive monomers were the most affected. Tribo-chemical silica coating combined with a silane coupling agent was the most efficient bonding treatment for the non-adhesive and the self-adhesive materials. The adhesive CLA performed better on alumina-blasted than on tribo-chemically coated surfaces.

scholarly journals Influence of Water Aging on Microtensile Bond Strength of a Flowable and a Packable Bulk-fill Resin Composites to Dentin

2020 ◽  
Vol 8 (D) ◽  
pp. 112-117
Author(s):  
Ayah Atif Selim ◽  
Ahmed Fawzy Abo Elezz ◽  
Rehab Khalil Safy
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Resin Composite ◽  
Water Storage ◽  
Aging Effect ◽  
Mean Value ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Influence Of Water

AIM: Investigation of the aging effect on the microtensile bond strength (μTBS) of bulk-fill resin composite (RC) versus a conventionally incrementally applied one. MATERIALS AND METHODS: A total number of 45 sound human impacted third molars extracted molars have been selected to prepare specimens for the μTBS test. Teeth were randomly divided into three groups (C) according to type of RC material which used for restoring the teeth. Where nanohybrid RC (Grandio®SO) was used as the control Group (C1), packable bulk-fill RC (X-tra fil®) was used for restoring teeth in C2 group and flowable bulk-fill RC (X-tra base®) was used for restoring teeth in C3 group. Each group was further subdivided into 3 subgroups (n = 5) according to the water storage time, where in subgroup 1; teeth were stored for 24 h, subgroup 2; teeth were stored for 3 months while for subgroup 3; and teeth were stored for 6 months. After water storage, teeth were sectioned for preparation of μTBS testing beams. Maximum tensile stresses were recorded in megapascal (MPa). RESULTS: After 24 h of water storage, the X-tra base® showed a higher statistically significant μTBS to dentin (33.82 ± 9.84 MPa) than did the other two types of RCs. After 3 months, the X-tra fil® showed the lowest mean value of μTBS (10.90 ± 5.66 MPa), meanwhile, after 6 months of water storage Grandio®SO showed the highest mean value of μTBS (15.85 ± 6.76 MPa). Regardless of the time the X-tra fil® showed the lowest mean of μTBS (15.07 ± 11.73 MPa), while there is no significant difference between the X-tra base® and Grandio®SO. Furthermore, the water aging adversely affects μTBS values which deceased gradually by time. CONCLUSION: The packable bulk-fill RC characterized by lower μTBS to dentin in comparison to the flowable bulk fill and the incrementally applied nanohybrid RCs. Furthermore, the μTBS of the three tested materials decreased gradually by aging.

Effect of surface treatment on enhancing interfacial strength of carbon fiber/polyimide composites

2020 ◽  
pp. 089270572092514
Author(s):  
Li Jian
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Surface Treatment ◽  
Resin Composite ◽  
High Surface ◽  
Interfacial Strength ◽  
Uniform Dispersion ◽  
Treatment Agent ◽  
Interlaminar Shear ◽  
Effect Of Surface

The practical application of carbon fiber (CF)-reinforced polyimide (PI) resin composite was hampered seriously by the poor interfacial adhesion property. In this work, a novel surface treatment agent was designed and prepared to improve the interfacial strength by covalently bonding CF with PI matrix, which is beneficial to the uniform dispersion and impregnation of PI between CF, thereby improving the mechanical properties of CF/PI composites to some extent. The CF was characterized by high surface roughness, which means better wettability by PI. As a result, the interfacial shear strength and interlaminar shear strength of CF/PI composites were enhanced, benefited mainly from the strong and tough interphase.

Effect of Storage Time on Bond Strength Performance of Multimode Adhesives to Indirect Resin Composite and Lithium Disilicate Glass Ceramic

2016 ◽  
Vol 41 (5) ◽  
pp. 541-551 ◽  
Author(s):  
P Makishi ◽  
CB André ◽  
JP Lyra e Silva ◽  
R Bacelar-Sá ◽  
L Correr-Sobrinho ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Ceramic ◽  
Resin Composite ◽  
Water Storage ◽  
Lithium Disilicate ◽  
Resin Cement ◽  
Control Group ◽  
Strength Performance ◽  
Significant Difference ◽  
One Year

SUMMARY Purpose: To investigate the bond strength performance of multimode adhesives (MMAs) to indirect resin composite and lithium disilicate glass ceramic after 24 hours or one year of water storage. Methods and Materials: Thirty flat and polished plates of indirect resin composite (Epricord) and thirty lithium disilicate glass ceramic plates (IPS e.max Press) were prepared. Surfaces were pretreated using sandblasting (indirect resin composite) or hydrofluoric acid (glass-based ceramic). Specimens were bonded with one of two MMAs (Scotchbond Universal [SBU] or All-Bond Universal [ABU]) or ceramic primer and hydrophobic bonding (RelyX Ceramic Primer and Adper Scotchbond Multi-Purpose Bond) as a control (n=10). Resin cement cylinders (0.75 mm in diameter × 0.5 mm in height) were bonded to both substrate surfaces using the respective adhesives. After 24 hours or one year of water storage, bonding performance was measured by microshear bond strength (MSBS) testing. Results were analyzed using three-way ANOVA with Bonferroni post hoc tests (α=0.05). Results: For indirect resin composite, significantly higher MSBS values were found for ABU after 24 hours (ABU > SBU = control); however, no significant difference among the adhesives was observed after one year (p>0.05). For glass-based ceramic, significantly different bond strengths were observed among the adhesives after 24 hours (control = ABU > SBU) and one year (control > SBU = ABU; p<0.05). Conclusions: Both MMAs tested can be considered effective alternatives for bonding to sandblasted indirect resin composite after aging, as they showed similar bond performance to that of the control group. However, separate bottles of silane bonding resin showed higher MSBS values and more durable bonding for etched glass–based ceramic.

Bond Durability of Composite Luting Agents to Ceramic When Exposed to Long-term Thermocycling

2007 ◽  
Vol 32 (4) ◽  
pp. 372-379 ◽  
Author(s):  
M. Peumans ◽  
K. Hikita ◽  
J. De Munck ◽  
K. Van Landuyt ◽  
A. Poitevin ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Surface Treatment ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Ceramic Surface ◽  
Luting Agents ◽  
Luting Cement ◽  
Cad Cam ◽  
Composite Cements

Clinical Relevance Depending on the ceramic surface treatment and chemical composition of the luting cement, there is a varying degree of bonding effectiveness of resin composite cements to CAD-CAM ceramic after thermocycling.

scholarly journals The Effect of Different Adhesive Types and Curing Methods on Microleakage and the Marginal Adaptation of Composite Veneers

2009 ◽  
Vol 10 (3) ◽  
pp. 18-26 ◽  
Author(s):  
Horieh Moosavi ◽  
Fathemeh Maleknejad ◽  
Nasrin Sarabi ◽  
Resa Shahriari ◽  
Taybeh Shayankhah
Keyword(s):  
Resin Composite ◽  
Resin Cement ◽  
Marginal Adaptation ◽  
Luting Agents ◽  
Bonding System ◽  
Halogen Light ◽  
Two Samples ◽  
Significant Difference ◽  
Curing Methods ◽  
Indirect Composite

Abstract Aim The aim of this in vitro study was to evaluate the influence of application techniques (with pre-curing vs without pre-curing) for dentin adhesive on microleakage and marginal adaptation of indirect composite veneer restorations. Methods and Materials A total-etch bonding system, Excite/Variolink II (EXV), and a self-etching primer system, Panavia F2.0 (PF2), were used in the study. Forty-eight human central incisors were prepared for composite veneer restorations. The teeth were divided into two groups (n=24). For each resin cement, one half of each experimental group included an adhesive pre-cure (PC) with a halogen light source while the other half received no pre-cure (NPC) prior to resin cement insertion. Thus, four experimental groups were created: A (PC+EXV), B (NPC+EXV), C (PC+PF2), and D (NPC+PF2). Veneers made of Tetric Ceram resin composite were cemented using dual-cured resin luting agents. After storage in distilled water at 37°C for 24 hours, the teeth were prepared for marginal leakage. Two samples of each group were selected at random for scanning electron microscopic (SEM) observation and evaluation of marginal adaptation at 1050x magnification. Data were analyzed using the Kruskal-Wallis and Mann-Whitney tests (Ð <0.05). Results The highest and lowest microleakage values were observed in dentinal margins of groups B and A, respectively. Dentin margins opposite to enamel margins had a significant difference in microleakage values of PC and NPC groups (P<0.05). The influence of the adhesive pre-cure was more pronounced than the type of resin cement used. No adhesive layer was visualized for the adhesives used without employing the pre-curing step. Conclusion The effect of pre-cured adhesives was not material specific. The pre-cured adhesives showed the best resistance to dye penetration although the film thickness of these luting agents was only slightly increased. Clinical Significance Different curing methods (with pre-curing/without pre-curing) regardless of total-etch or self-etch adhesive systems influenced microleakage and the marginal adaptation, especially dentin margins of indirect composite veneers. Citation Maleknejad F, Moosavi H, Shahriari R, Sarabi S, Shayankhah T. The Effect of Different Adhesive Types and Curing Methods on Microleakage and the Marginal Adaptation of Composite Veneers. J Contemp Dent Pract 2009 May; (10)3:018-026.

scholarly journals Effect of Water Storage and Additional Polymerization on the Color Parameters of Flowable Resin Composites

2013 ◽  
Vol 14 (6) ◽  
pp. 1109-1114 ◽  
Author(s):  
Çağatay Barutcigil ◽  
Osman Tolga Harorli ◽  
Yusuf Ziya Bayindir ◽  
Funda Bayindir
Keyword(s):  
Color Change ◽  
Resin Composite ◽  
Water Storage ◽  
Exposure Period ◽  
Color Variation ◽  
Resin Composites ◽  
Color Parameters ◽  
Effect Of Water ◽  
Restorative Materials ◽  
Initial Color

ABSTRACT Aims Tooth colored dental restorative materials should maintain their chromatic properties throughout their service period. The aim of this study was to examine the possible color changes of flowable resin composite filling materials following water storage. The effect of additional light curing on color stability of restorative materials was also investigated. Materials and methods Six brands of light-cured flowable resin composites of the same shade (A3) were prepared from two groups generated by curing for 20 or 60 seconds. The initial color parameters of the flowable composite samples were measured with a dental colorimeter according to the CIELAB color scale, and the samples were stored in distilled water at 37oC. Following 2 weeks' water storage, the measurements were repeated. The color differences (ΔE*ab) were calculated according to the CIELAB formula. Statistical differences between the measurements were analyzed by ANOVA and Duncan's tests. Results No initial color variation between the samples cured for 20 seconds and 60 seconds was perceptible (ΔE*ab<3.3). However, after 2 weeks' water storage, a noticeable color change, ΔE*ab>3.3, was detected in Eco-flow, Filtek Supreme and Grandio samples in both polymerization groups. Conclusion Flowable resin composites may exhibit a significant color change as a result of water storage. Sixty seconds exposure period does not influence the final color. Clinical significance Clinicians should be aware of color shifts in flowable resins. How to cite this article Harorli OT, Barutcigil C, Bayindir YZ, Bayindir F. Effect of Water Storage and Additional Polymerization on the Color Parameters of Flowable Resin Composites. J Contemp Dent Pract 2013;14(6):1109-1114.

scholarly journals Impact of Immediate Dentin Sealing Using Universal Adhesive under Simulated Pulp Pressure on Microtensile Bond Strength of Indirect Resin Composite Restorations and Dentin Permeability

2021 ◽  
Author(s):  
Emad Abd Elfatah Abo-Alazm ◽  
Rehab Khalil Safy
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Water Storage ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Dentin Permeability ◽  
Composite Restorations ◽  
Significant Difference ◽  
Cad Cam ◽  
Self Etch

Abstract Objective The aim of this study was to investigate the effect of immediate dentin sealing (IDS) technique using universal adhesive under simulated pulp pressure on microtensile bond strength (µTBS) of indirect resin composite restorations and dentin permeability. Materials and Methods Fifty extracted caries-free human third molars were used for specimens' preparation. Each molar's occlusal table was abraded flat and their roots were separated under continuous water cooling. Forty specimens were used for microtensile bond strength test (µTBST) evaluation. The µTBST specimens were randomly assigned to two groups according to the dentin sealing time; Immediate dentin sealing (IDS) and delayed dentin sealing (DDS). Each group was further subdivided into two subgroups according to the adhesive system used for dentin sealing: iBOND self-etch adhesive and GLUMA Bond Universal. All specimens were exposed to simulated pulp pressure for 1 week then restored using computer-aided design/computer-aided manufacturing (CAD/CAM) resin composite blocks. The µTBS was evaluated for all tested subgroups after 24 hours and 6 months of water storage. The remaining 10 teeth were used for the preparation of dentin discs for dentin permeability evaluation. They were divided into two groups according to type of self-etch adhesive used. Fluid filtration rate was evaluated after etching, with smear layer and after adhesive application. Results obtained were statistically analyzed using Shapiro–Wilk test and Weibull analysis. Results Statistically significant difference was recorded between μTBS mean values of both IDS and DDS techniques at 24 hours and after 6 months of water storage. GLUMA Bond Universal adhesive had significantly higher bond strength compared with iBond at both IDS and DDS techniques, but both adhesives showed a significant reduction in the Weibull characteristic strength after 6 months of water storage. Significant reduction in dentin permeability was recorded by both adhesives without any significant difference between them. Conclusions The IDS technique using universal adhesive in self-etch mode is an effective strategy for improving the final bond strength of CAD/CAM resin composite restorations and reducing dentin permeability.

Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity

2020 ◽  
Vol 9 (4) ◽  
pp. e27942662
Author(s):  
Patrícia Capellato ◽  
Cláudia Eliana Bruno Marino ◽  
Gilbert Silva ◽  
Lucas Victor Benjamim Vasconcelos ◽  
Rodrigo Perito Cardoso ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Surface Treatment ◽  
Titanium Surface ◽  
Silver Clusters ◽  
Silver Particles ◽  
Silver Deposition ◽  
Dispersed Particles ◽  
Significant Difference ◽  
Diffusion Assay ◽  
Antibacterial Potential

During the last decades, researchers have been growing the interest in surface treatment with an antimicrobial agent. Silver nanoparticles (AgNPs) are widely used in biomedical fields due to their potent antimicrobial activity. So, in this study was investigated silver particles (isles) coated on titanium surface for dental and orthopedic application. Silver particles coating process on titanium surface were performed via sputtering that is a plasma-assisted deposition technique with and titanium without treatment was applied as comparing standard. Plasma treatment parameters were optimized so that the result was not a thin film of Ag but dispersed particles of Ag on the Ti-cp surface. The alloy surfaces were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to investigate antibacterial potential Staphylococcus aureus and Escherichia coli have been used at Agar diffusion assay. The results were analyzed by analysis of variance (ANOVA) in order to verify significant difference antimicrobial activity between samples that have shown no difference between the surfaces studied treatments. For silver deposition scattered particles (isles) over titanium surface for a 10-minute treatment, EDS revealed by silver clusters that the particles were not properly scattered onto surface, hence, the low effectiveness in antibacterial activity.

scholarly journals Effect of sizing agent on interfacial properties of carbon fiber-reinforced PMMA composite

2021 ◽  
Vol 30 ◽  
pp. 2633366X2097865
Author(s):  
Li Jian
Keyword(s):  
Shear Strength ◽  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Resin Composite ◽  
Contact Angles ◽  
Static Contact ◽  
Before And After ◽  
C Value ◽  
Interlayer Shear Strength ◽  
Pmma Resin

The surface treatment of carbon fibers (CFs) was carried out using a self-synthesized sizing agent. The effects of sizing agent on the surface of CFs and the interface properties of CF/polymethyl methacrylate (PMMA) composites were mainly studied. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and static contact angle were used to compare and study the CFs before and after the surface treatment, including surface morphology, surface chemical element composition, and wettability of the surface. The influence of sizing agent on the mechanical properties of CF/PMMA resin composite interface was investigated. The results show that after sizing treatment, the CF surface O/C value increased by 35.1% and the contact angles of CF and resin decreased by 16.2%. The interfacial shear strength and interlayer shear strength increased by 12.6%.

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