Thermocycling Effects on Resin Bond to Silicatized and Silanized Zirconia (original) (raw)
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Pilot evaluation of resin composite cement adhesion to zirconia using a novel silane system
Acta Odontologica Scandinavica, 2007
Objective. In this study, we evaluated the effect of two silane coupling agents and their blends with a cross-linker silane on the bond strength of a dimethacrylate-based resin composite cement to surface-conditioned zirconia. Material and Methods. A total of 40 planar zirconia specimens were used for 8 test groups. After alumina particle abrasion, followed by tribochemical silica-coating, the specimens were randomly assigned to four silanizations: with 1.0 vol% 3-methacryloyloxypropyltrimethoxysilane or 1.0 vol% 3-mercaptopropyltrimethoxysilane or their blends with 1.0 vol% 1,2-bis-(triethoxysilyl)ethane (all in ethanol/water). The resin composite (RelyX TM ARC, 3M ESPE) stubs (n 0/10/group) were lightpolymerized onto zirconia specimens. Four test groups were tested without water storage and 4 thermo-cycled at 6000 cycles (59/18C to 559/18C), with a dwelling time of 30 s. The shear bond strength of the cement stubs to zirconia was measured using a universal testing machine at a constant cross-head speed of 1 mm/min. Scanning electron microscopy was employed for imaging the zirconia surface after conditioning and testing. Failure mode was evaluated visually. A surface chemical analysis was carried out with the EDXA system. Results. The highest shear bond strength was 21.99/8.7 MPa, obtained with a blend of 3-mercaptopropyltrimethoxysilane and 1,2-bis-(triethoxysilyl)ethane (dry storage), and 16.09/1.5 MPa, with 3-methacryloyloxypropyltrimethoxysilane (thermo-cycled). Thermo-cycling decreased the bond strengths significantly (ANOVA, p B/0.01), and the silanes differed significantly (p B/0.005). Some specimens suffered from spontaneous debonding during thermo-cycling. Conclusions. The luting cement adhesion might be promoted to silicacoated zirconia with 1.0 vol% 3-methacryloyloxypropyltrimethoxysilane and with a blend of 1.0 vol% 3-mercaptopropyltrimethoxysilane and 1.0 vol% 1,2-bis-(triethoxysilyl)ethane.
Journal of Applied Oral Science, 2003
he aim of the present study was to evaluate the effect of thermocycling on the bond strength between the surface of the glass-infiltrated alumina ceramic In-Ceram (VITA) and the Panavia F resin cement (Kuraray CO.). Four 5x6x6mm In-Ceram blocks were obtained. One of the 6x6mm faces of each block was conditioned with Cojet -System (tribochemical silica coating, ESPE-3M) and then luted under a constant 750g pressure with Panavia F cement to another identical face of a resin composit block (Clearfil AP-X, Kuraray) obtained by reproduction of the ceramic one from Express (3M) addition curing silicone impressions. The four sets so formed by ceramic, luting cement and resin have been each one serially sectioned in 20 sticks so that the adhesive surface in each presented 1mm 2 of area. The samples were divided in 2 groups (n=10): G1-stored for 7 days in deionized water at 36 ± 2°C; G2 -thermocycled 1500 times between 5 and 55°C dwell times. The microtensile tests were accomplished in an universal testing machine (EMIC) at a crosshead speed of 0,5 mm/min. The results showed that the mean tensile bond strength values (MPa) for the group G2: (22,815 ± 5,254) had not statistically differ of the values of group G1: (25,628 ± 3,353) (t = 1,427; gl = 18; p-value = 0,171), at the level of a= 5%. It can be concluded that the thermocycling technique used in the present experiment had not produced statistically significant differences between the bond strength results of the specimens obtained by the two used techniques.
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH, 2014
Improving the retention of zirconia-based ceramics is desirable in order to avoid the failure of crowns and fixed partial dentures .This can be achieved by creating micromechanical retention using surface treatments. Therefore, it becomes necessary to constantly compare and re-evaluate the influence of different surface treatment methods on the bond strength . To evaluate the effect of four different surface treatments on shear bond strength between zirconia surface and resin cements. Observational study. Twenty five zirconia plate samples were prepared based on ISO standards and were divided into five groups and each group was subjected to following five different surface treatments : no treatment, sandblasting with 110 μm alumina, sandblasting with 250 μm alumina, acid etching with 9.6% hydrofluoric acid and laser radiation on the surface. All the samples were surface disinfected and were embedded in blocks of autopolymerising resin to check shear bond strength on the universal testing machine. Statistical analysis used-data was analyzed using one-way ANOVA and a Post Hoc Bonferroni test. Analysis of the data showed that the highest shear bond strength values were obtained with laser treatment (18.120 ± 0.8159 Mpa). The lowest values were obtained with control group (9.166 ± 0.569 Mpa). Laser treatment increased the shear bond strength values significantly (p<0.05). Surface treatments increased the bond strength between zirconia and resin cement and carbon dioxide laser could be an effective surface treatment for increasing bond strength.
IP innovative publication pvt. ltd, 2019
Lithium-disilicate glass-ceramic (LDGC) material was introduced in the year 2000; it improved the strength of single and multiple-unit restorations. The inherent brittleness and limited flexural strength of the available glass-ceramic material were the major drawbacks of these restorations. Adequate adhesion between ceramic and tooth substructure was vital for the successful functioning of ceramic restoration. Limited information is available about the currently available luting systems. Aims and objectives: The present in-vitro study was designed to compare and evaluate the shear bond strength of three different resin based luting cements to lithium disilicate glass ceramic. The study was conducted to evaluate the shear bond strength of different resin based luting cements to lithium disilicate glass ceramic. Methods and Methodology: Thirty lithium disilicate glass ceramic disks were fabricated and were surface treated. The ceramic specimen were divided into three groups that received three different luting cements (Group 1: RelyX Ultimate Clicker, Group 2: Fusion Self Lute and Group 3: ParaCore). The shear bond strength of adhesive resin cement to the ceramic substrate was then measured with a Universal testing machine (Multitest 10-I, Mecmesin). Following de-bonding, all fractured interfaces were visually analysed from the Scanning electron microscope photomicrographs to determine the mode of fracture. Results: The study results demonstrated that there was no statistical significant difference between RelyX and Fusion Self Lute while there was statistically significant difference between RelyX and ParaCore (p=0.019, p<0.05) and Fusion Self Lute and ParaCore (p=0.03, p<0.05). Conclusion: the study concluded that the resin cements containing filler particles show higher bond strength values when compared to resin cements with no filler particles and bonds which fail by cohesion exhibit high-strength performance.
Bonding Strength of Luting Cement to Zirconia-Based Ceramic Under Different Surface Treatments
European Journal of Dentistry, 2019
Objectives The aim of this study was to evaluate the bonding strength of self-adhesive luting cement to zirconia under different surface treatments. Materials and Methods Thirty-two zirconia samples were randomly divided into eight experimental groups based on the surface treatment employed (Control: no surface treatment; PMM: wear with diamond bur; JAT: blasting with glass beads; PMA: wear with a medium-roughness milling machine; Primer: primer application on the surface without treatment; PMM +Primer: PMM treatment plus primer application; JAT+Primer: JAT treatment plus primer application; and PMA+Primer: PMA treatment plus primer application). Cement cylinders were built on the ceramic surfaces, and the groups were subdivided according to the storage time employed (i.e., 24 hours or 60 days). After storage, the samples were subjected to microshear testing. Statistical Analysis The Kruskal–Wallis test followed by the Dunn test was employed for comparison between the groups (p <...
Journal of Prosthodontics, 2011
Purpose: This study evaluated the bond strength between resin cement and Y-TZP ceramic (Yttrium-stabilized Tetragonal Zirconia Polycrystalline) submitted to different surface conditionings. Materials and Methods: Fifty Y-TZP ceramic discs (Ø = 10 mm) were allocated into five groups: Gr1 (control)-no conditioning; Gr2-tribochemical silica coating (30-μm SiO 2 ) before sintering; Gr3-air abrasion with 50-μm Al 2 O 3 before sintering; Gr4-air abrasion with 110-μ Al 2 O 3 before sintering; Gr5 -air abrasion with 50-μm Al 2 O 3 after sintering. After specimen preparation, cylinders of composite resin were prepared and immediately cemented onto the ceramic. A shear test was performed. Results: One-way ANOVA indicated a statistically significant difference among the groups (p = 0.0019). The mean shear bond strengths (MPa) were: Gr1 = 4.7 ± 0.8, b Gr2 = 4.6 ± 0.9, b Gr3 = 6.4 ± 1.0, a Gr4 = 6.5 ± 1.8, a Gr5 = 6 ± 1.3 ab (same superscript letter indicates statistical similarity). Adhesive fracture between the ceramic and resin cement was the most common failure. No complete cohesive fracture at the ceramic or composite cylinders was noted. Conclusion: Within the limitations of this study, additional surface treatment with air abrasion before and after sintering provided a significant increase in bond strength. Tribochemical silica coating before sintering was not effective as a surface treatment.
Bond strengths of various resin cements to different ceramics
Brazilian Oral Research, 2019
This study evaluates the shear bond strength (SBS) of various resin cements to different ceramics. Composite resin cylinders of Z100 were fabricated and cemented to disks of feldspathic ceramic (Creation), leucite-reinforced feldspathic ceramic (Empress I), and densely sintered aluminum oxide ceramic (Procera AllCeram) using five resin cements: Panavia F (PAN), RelyX ARC (ARC), RelyX Unicem (RXU), RelyX Veneer, and Variolink II. SBS was measured after three days of water storage (baseline) and after artificial aging (180 days of water storage along with 12,000 thermal cycles). Failure mode of fractured specimens also was evaluated. Data were analyzed with Kruskal-Wallis and Mann-Whitney tests (α=0.05). RXU showed 1) the lowest baseline median SBS to feldspathic ceramic, which was not statistically different from PAN; 2) the lowest median baseline SBS to leucite-reinforced feldspathic and densely sintered aluminum-oxide ceramics. All cements performed similarly after aging, except for ARC (median 0.0 MPa) and PAN (median 16.2 MPa) in the densely sintered aluminum-oxide ceramic group. Resin cements perform differently when bonded to different ceramic substrates. While all test resin cements worked similarly in the long-term to feldspathic and leucite-reinforced feldspathic ceramics, only the MDP-containing resin cement provided durable bonds to densely sintered aluminum-oxide ceramic.
Early Bond Strength of Two Resin Cements to Y-TZP Ceramic using MPS or MPS/4-META Silanes.
For cementation of yttrium-stabilized tetragonal zirconium polycrystal (Y-TZP) ceramic frameworks, protocols of surface-conditioning methods and available cements vary, resulting in confusion among clinicians regarding selection and effects of different conditioning methods on cement adhesion. This study evaluated the effect of two silanes (3-trimethoxysilylpropylmethacrylate (MPS) and 3-trimethoxysilylpropylmethacrylate/4-methacryloyloxyethyl trimellitate anhydride methyl methacrylate (MPS/ 4-META) on the adhesion of two resin-based cements (SuperBond and Panavia F 2.0) to Y-TZP ceramic and compared several protocols with those indicated by the manufacturer of each of these cements. Disks of Y-TZP ceramic (LAVA, 3M ESPE) (n = 60) were divided into six experimental groups (n = 10 per group) and treated as follows: (1) silica coating (SC) + MPS silane + SuperBond; (2) SC + MPS/4-META + silane + SuperBond); (3) SC + MPS silane + Panavia F 2.0); (4) SC + MPS/4-META silane + Panavia F 2.0); (5) no conditioning + MPS/4-META silane + Super-Bond (SuperBond instructions); and (6) 50-μm Al 2 O 3 conditioning + Panavia F 2.0 (Panavia F 2.0 instructions). The specimens were subjected to shear-bond testing after water storage at 37°C for 3 months in the dark. Data were analyzed by analysis of variance and Tukey's HSD (α = 0.05). After silica coating, the mean bond strength of SuperBond cement was not signifi cantly different between MPS and MPS/4-META silanes (20.2 ± 3.7 and 20.9 ± 1.6 MPa, respectively), but the mean bond strength of Panavia F 2.0 was signifi cantly higher with MPS silane (24.4 ± 5.3 MPa) than with MPS/4-META (12.3 ± 1.4 MPa) (P < 0.001). The SuperBond manufacturer's instructions alone resulted in signifi cantly higher bond strength (9.7 ± 3.1 MPa) than the Panavia F 2.0 manufacturer's instruction (0 MPa) (P < 0.001). When silica coating and silanization were used, both SuperBond and Panavia F 2.0 cements demonstrated higher bond strengths they did when the manufacturers' instructions were followed. With SuperBond, use of MPS or MPS/4-META silane resulted in no signifi cant difference when the ceramic surface was silica coated, but with Panavia F 2.0, use of MPS silane resulted in a signifi cantly higher bond strength than use of MPS/4-META. Use of chairside silica coating and silanization to condition the zirconia surface improved adhesion compared with the manufacturers' cementation protocols for SuperBond and Panavia F 2.0 resin cements.
This study evaluated the adhesion of resin cements to zirconia with different primers/silane coupling agents using two test methods with and without aging. Zirconia discs (Cercon) (N = 900, n = 15 per group) were ground finished to 2000 grit silicone carbide and randomly divided into seven groups: (a) C: No treatment (Control), (b) SG: Signum, (c) CL: Clearfil Ceramic Primer, (d) AP: Alloy Primer, (e) Monobond Plus, (f ) ES-R: ESPE-Sil after Rocatec and (g) ES-C: ESPE-Sil after CoJet. Methacrylate (Variolink II-VL) and MDP based (Panavia F2.0-PN) dual-polymerized and self-adhesive resin cements (RelyX Unicem-RX) were adhered and polymerized accordingly. The specimens were further randomly divided into two groups to be tested after (a) 24-h dry storage at 37 °C and (b) thermocycling (×5000, 5-55 °C). Macroshear (MSB) and macrotensile bond tests (MTB) were conducted in an universal testing machine (crosshead speed: 1 mm/ min) and failure types were analyzed after debonding. Data were analyzed using Univariate analysis and Tukey's tests (α = 0.05). Twoparameter Weibull modulus, scale (m) and shape (0) were calculated. While primer/silane (p < 0.001), cement type (p < 0.001) and aging (p < 0.001) significantly affected the bond results, test method did not show significant difference (p = 0.237). In MSB test, Weilbul moduli were more favorable for MP-VL (4.2) and AP-PN (6) combinations and after aging for MP-VL (4.2) and AP-PN (5.66). In MTB test, after aging, Weilbul moduli were more favorable for AP-PN (5.41). Bond strength results mostly decreased with SG (24-92%) after aging. Cohesive failures in the cement were more frequent with PN (252) compared to VL (83).