The effect of nano-structured alumina coating on resin-bond strength to zirconia ceramics (original) (raw)
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Journal of Health Sciences, 2019
The evolution of dental materials and the improvement of ceramic systems stimulated the increased use of Y-TZP zirconia-based ceramics. Despite the excellent mechanical performance, this material has low adhesion potential. The objective of this work was to evaluate the surface treatments and resin cements influence on bond strength between Y-TZP zirconia and composite resin interface. A total of 60 blocks of Y-TZP zirconia (3x8x8mm) were prepared and divided into 3 groups according to the surface treatments: (C) control - extra fine diamond bur, (J) sandblasting with Al2O3 and (JP) sandblasting with Al2O3 + ceramic primer. Each group was subdivided into two groups according to type of resin cement used for cementing composite resin discs (2mm thick x 5mm diameter): self-adhesive and conventional (n=10). The samples were stored in distilled water for 24 hours at 37±1°C in a incubator and subsequently submitted to the shear bond test to determine the bond strength (RU). There was no ...
Influence of Hydrophilic Pre-treatment on Resin Bonding to Zirconia Ceramics
The Bulletin of Tokyo Dental College, 2015
Atmospheric plasma or ultraviolet (UV) treatment alters the surface characteristics of tetragonal zirconia polycrystal (TZP), increasing its hydrophilicity by reducing the contact angle against water to zero. This suggests that such treatment would increase the wettability of bonding resin. The purpose of this study was to determine how increasing the hydrophilicity of TZP through plasma irradiation, UV treatment, or application of ceramic primer affected initial bonding with resin composites. Here, the effect of each pre-treatment on the hydrophilicity of TZP surfaces was determined by evaluating change in shear bond strength. Plasma irradiation, UV, or ceramic primer pre-treatment showed no significant effect on bonding strength between TZP surfaces and resin composites. In addition, alumina blasting yielded no significant increase in bond strength. Plasma irradiation, UV treatment, or ceramic primer pre-treatment did not lead to significant increase in bond strength between TZP a...
Journal of the European Ceramic Society, 2012
The purpose of this study was to evaluate the effect of Y-TZP ceramic surface functionalization with a nano-structured alumina coating on bond strength of the resin modified glass ionomer dental cement. A total of 160 disc-shaped specimens were produced and randomly divided into two groups of 80. Half of the discs in each group received an alumina coating which was fabricated by exploiting the hydrolysis of aluminum nitride (AlN) powder. The shear bond strengths of the resin-modified glass ionomer cement FUJI+ (GC Japan) and the composite resin luting agent RelyX Unicem (3M ESPE, USA) were then studied for the coated and uncoated surfaces The SEM analyses revealed that the application of an alumina coating to the Y-TZP ceramics created a highly retentive surface for bonding. The bond strengths for the coated groups in both cements were significantly higher than the uncoated groups.
Influence of surface conditioning and cleaning methods on resin bonding to zirconia ceramic
Dental Materials, 2011
Objectives. The purpose of this laboratory study was to evaluate the influence of different surface conditioning, new ceramic primers and cleaning methods on the bond strength of luting resin to zirconia ceramic (e.max ZirCAD). Methods. A total of 96 zirconia ceramic discs were divided into six groups (n = 16) according to surface conditioning, cleaning methods and ceramic primers. Zirconia ceramic discs were either air-abraded with 110 m alumina particles or tribochemically silica-coated (Rocatec). Visible dust resulting from airborne particle abrasion or silica coating was removed either by oil-free air stream or by ultrasonic cleaning in alcohol. Then either a conventional silane (Espe Sil) or a universal primer containing a silane and a phosphate monomer (Monobond Plus) were applied to the conditioned surface. Transparent plastic tubes filled with composite resin were bonded to the zirconia ceramic discs using a luting resin (MultiLink Automix). The bonded specimens were stored in water at 37 • C for 3 days and for 30 days with 7500 thermal cycles between 5 • C and 55 • C prior to tensile test. Statistical analyses were conducted with three-, two-and one-way ANOVAs followed by comparison of means with Tukey's HSD test. Results. Tensile bond strength ranged from 31.5 to 45.2 MPa after 3 days and from 10.6 to 38.8 MPa after 30 days storage in water with thermal cycling. After artificial aging the decrease in bond strength was significant when the conventional silane was applied after silica coating or when the universal primer was used after airborne particle abrasion without ultrasonic cleaning (P < .05). However after artificial aging, the decrease in bond strength was not significant (P > .05) when the universal primer was used after airborne particle abrasion with ultrasonic cleaning or after silica coating. Significance. A new universal primer improved bonding to zirconia ceramic while the cleaning method had little or no effect.
2020
Objectives: To evaluate the effect of different surface treatments; plasma treatment, silica coating using plasma technology and sandblasting, on bond strength, surface roughness and microscopic structure of yttria-stabilized tetragonal zirconia polycrystals(Y-TZP) after thermo-cycling. Matrials and methods: One hundred discs (n ¼ 100) of yttria-stabilized tetragonal zirconia were prepared from (Y-TZP) ceramic blocks using MAD/MAM milling technology, and were divided into four equal groups (n ¼ 25) according to the type of surface treatment. Group (1): control (no surface treatment). Group (2): zirconia discs were sandblasted by alumina particles. Group (3): zirconia discs treated by plasma technology to produce surface roughness. Group (4): zirconia discs coated by silica using plasma technology. Samples of each group were subdivided into four subgroups according to different analytical techniques. Subgroup (A): (n ¼ 10) subjected to testing of bond strength of zirconia discs to ad...
Combined Novel Bonding Method of Resin to Zirconia Ceramic in Dentistry: A Pilot Study
Journal of Adhesion Science and Technology, 2011
Zirconia is a promising metal-free framework material that can be used to construct allceramic resin-bonded restorations in modern minimally invasive dentistry. The lack of a durable bond to zirconia is the major limitation against its widespread use. A technique to promote adhesion to the zirconia surface has thus been actively sought in dental materials research. Selective infiltration etching (SIE) has emerged as a method of conditioning that creates a highly retentive zirconia surface. This in vitro pilot study tested a novel adhesion procedure in which two newly engineered silane-based zirconia primers were combined with the SIE method. Zirconia discs were SIE-surface-treated, coated with one of the 2 zirconia primers, and bonded to composite resin discs. Primer activation (hydrolysis) was monitored by Fourier transform infrared (FTIR) spectroscopy. The bilayered specimens were sectioned into microbars and subjected to the microtensile bond strength test. As-sintered zirconia discs served as controls. Surface analysis of zirconia specimens was carried out using photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Zirconia specimens that had been treated with both SIE and primers had a significantly higher (ANOVA) zirconia resin bond strength (40.6 MPa, SD 5.8 MPa) than control specimens (2.6 MPa, SD 3.0 MPa; p < 0.05, F = 13.8, ANOVA). Controls also exhibited spontaneous failure during sectioning. Additionally, the interfacial failure rate was lower for the specimens subjected to the new combined surface treatment than for controls. The novel combined method of surface treatment method might open new opportunities for enhanced adhesion of resin-bonded zirconia restorations.
Effects of Some Chemical Surface Modifications on Resin Zirconia Adhesion
Journal of the Mechanical Behavior of Biomedical Materials, 2015
Objectives: To evaluate the effects of various chemical surface modifications on adhesion between zirconia and resin adhesive. Material and methods: Pre-sintered zirconia discs were sectioned from commercial cylindrical blocks and polished with abrasive papers under running tap water. All the discs were randomly divided into five study groups according to the methods of surface treatment, including: the control group (fully sintered, without any modification), group S (fully sintered and sandblasted with silica coated alumina particles), group HN (fully sintered and etched with a blend of mineral acid solution at 100 1C for 25 min), group HF (fully sintered and etched with 48% hydrofluoric acid solution at 100 1C for 25 min), and group Si (coated with silica particles and then fully sintered). The mean value of surface roughness was evaluated before further treatment. Resin stubs (3.6 mm in diameter and 3 mm in height) were adhered and light cured on each zirconia disc after the application of a silane coupling agent. In each group, all the samples were further divided into three subgroups with each n¼12, one for the measurement of initial adhesion strength (shear bond) value and the other two were tested after thermal cycling for 10,000 and 20,000 cycles, respectively. The results were analyzed with two-way ANOVA and Turkey HSD (po0.05). XRD technique was utilized in the examination of zirconia surface crystallinity. The morphological appearance of zirconia surface after surface treatment was observed with SEM. Results: The control group showed the lowest initial shear bond strength (SBS) value (16.872.4 MPa) and did not survive the aging treatments. All the investigated surface treatments improved resin zirconia bond strength significantly, the group S displaying the highest initial value of 25.172.7 MPa. However, the highest resistance to the aging effects of thermal cycling was found in group Si. It was further shown in the XRD examination that only the grit-blasting caused the crystalline transformation from tetragonal phase to monoclinic phase (T-M). On the other hand, such a phase transformation could not be detected in all the other four groups. Significance: Resin zirconia adhesion could be effectively improved by both HF etching and silica coating on zirconia surface, without leading to a T-M crystalline phase transformation. (H.M. Wong).
Scientific Reports, 2023
In fact, bonding of zirconia restorations is still a big challenge in clinical situations and many bonding protocols discussed in literature might be still controversial. The aim of this was to study assess the bond strength of zirconia after alumina and glass-bead pre-treatments with two different primers in combination with conventional resin cement and 10-methacryloyloxydecyl dihydrogen phosphate (MDP) containing self-adhesive resin cement without priming. Fully sintered high translucent zirconia samples (n = 160) were assigned into 2 groups of pre-treatments (n = 80): Alumina-sandblasting (AB) and Glass-bead (GB). Then, each group was divided into 4 subgroups according to priming and cement used (n = 20 each): conventional self-adhesive resin cement, MDP-silane Primer, MDP primer both with conventional self-adhesive resin cement, and MDP contained cement. Shear bond strength (SBS) was measured after thermocycling. Failure mode was analyzed using stereomicroscope. Contact angle and surface topography were investigated using other fully sintered samples (n = 30) constructed for that sole purpose, divided into control (no pre-treatment [unmodified], alumina-, and glass-bead sandblasted groups). Two-way ANOVA was performed for SBS and failure mode was analyzed. The use of Alumina-sandblasting showed higher SBS compared to Glass-bead pre-treatment for MDP-silane primer (p = 0.034) and MDP primer (p < 0.001). While MDP contained cement showed higher but insignificant SBS when pre-treated with glass-beads. Alumina-sandblasting and glassbead pre-treatments improve bond strength of zirconia combined using primers before cementation with conventional resin cement. Also, self-adhesive MDP contained cement along with surface pre-treatment showed the highest achievable bond strength. It was concluded that both aluminasandblasting and glass-bead blasting improved SBS combined with MDP containing self-adhesive resin cement reducing the required clinical steps during cementation of zirconia restorations. Nowadays, the demand for highly esthetic restorations is increasing in everyday dental practice owing to the fast-paced evolvement and innovation in digital dentistry. Dental zirconia is considered one of the most commonly used restorative materials due to its high mechanical properties compared to glass ceramics 1. That leads to increase the range of indications in the field of fixed prosthodontics and indirect restorations, but earlier zirconia generations suffered from lower translucency, higher opacity and hence, less superior esthetics as it is composed of dense polycrystalline structure with no glass matrix when compared to glass ceramics limiting its use to posterior region 2. To improve the optical properties, increasing the yttria content to 5 mol% yttria-stabilized
Operative Dentistry, 2012
SUMMARY Purpose The purpose of the current study was to evaluate different approaches for bonding composite to the surface of yttria stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics. Methods One hundred Y-TZP blocks were embedded in acrylic resin, had the free surface polished, and were randomly divided into 10 groups (n=10). The tested repair approaches included four surface treatments: tribochemical silica coating (TBS), methacryloxydecyldihidrogenphosphate (MDP)–containing primer/silane, sandblasting, and metal/zirconia primer. Alcohol cleaning was used as a “no treatment” control. Surface treatment was followed by the application (or lack thereof) of an MDP-containing resin cement liner. Subsequently, a composite resin was applied to the ceramic surface using a cylindrical mold (4-mm diameter). After aging for 60 days in water storage, including 6000 thermal cycles, the specimens were submitted to a shear test. Analysis of variance and the Tukey test were used for sta...