Mechanical Properties of Y-TZP Ceramic after Different Surface Treatments

2011 ◽  
Vol 492 ◽  
pp. 71-74 ◽  
Author(s):  
Qi Liu ◽  
Long Quan Shao ◽  
Chen Hu ◽  
Bin Deng ◽  
Yuan Fu Yi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Bond Strength ◽  
Test Data ◽  
Shear Bond Strength ◽  
Er:Yag Laser ◽  
Tetragonal Zirconia ◽  
Surface Modifications ◽  
Surface Treatments ◽  
Anova Analysis

The objective of this study was to investigate the mechanical properties of yttrium- stabilized tetragonal zirconia (Y-TZP) ceramics after different surface treatments. Cercon Smart Ceramics samples were divided into groups: (1) bland control (no treatment), (2) hand grinding, (3) Al2O3air-abration, (4) irradiation with 200mJ Er:YAG laser. Tensile bond strength, shear bond strength and flexural strength were evaluated after 24h storage at 37°C. Each group had 10 samples for different test. Data were evaluated using ANOVA analysis (α=0.05). Laser and air-abration achieved higher tensile and shear bond strength when air-abration presented the best flexural strength. Surface modifications significantly increased the mechanical properties of the Y-TZP ceramics.

scholarly journals Influence of Different Surface Treatments on the Shear Bond Strength of Resin Cement to Base Metal Alloys

2020 ◽  
Vol 11 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Farkhondeh Raeisosadat ◽  
Rahab Ghoveizi ◽  
Solmaz Eskandarion ◽  
Elaheh Beyabanaki ◽  
Sara Tavakolizadeh
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Er:Yag Laser ◽  
Testing Machine ◽  
Surface Treatments ◽  
Resin Cement ◽  
Combination Group ◽  
Significance Level ◽  
Laser Group ◽  
Mean Differences

Introduction: This study aimed to investigate the effect of different surface treatments on the bond strength of resin cement to nickel-chrome (Ni-Cr) alloy. Methods: Forty disk-shaped specimens of Ni-Cr alloy were prepared and divided into 4 groups. In the first group, the specimens’ surface was sandblasted with 50 µ Al2 O3 particles. In the second group, the specimens were prepared with the Er:YAG laser. In the third group, the specimens were prepared using the Er:YAG laser after sandblasting. In the fourth group, the specimens’ surface was covered with a thin layer of MKZ metal primer after sandblasting. Then the cylinders of composite resin were bonded to the treated metal surfaces using Panavia F2.0 resin cement. All of the samples were subjected to 2000 thermal cycles. The shear bond strength was tested using a universal testing machine at the crosshead speed of 0.5 mm/min. The failure mode was also observed by a stereomicroscope. Data were analyzed using the one-way ANOVA and the Tukey HSD test at a significance level of 0.05. Results: The shear bond strength from the highest to the lowest were as follows: the Er:YAG laser group, the sandblast and MKZ primer combination group, the sandblast group, and the sandblast and Er:YAG laser combination group. The mean differences of shear bond strength between the Er:YAG laser group and the sandblast group (P=0.047) and also between the Er:YAG laser group and the sandblast and Er:YAG laser combination group (P=0.015) were statistically significant. Conclusion: Among the different surface treatments employed in this study, Er:YAG laser treatment increased the shear bond strength between the metal alloy and the resin cement (Pavnavia F2).

scholarly journals Novel Femto Laser Patterning of High Translucent Zirconia as an Alternative to Conventional Particle Abrasion

2021 ◽  
Vol 9 (2) ◽  
pp. 20
Author(s):  
Emmanouil-George C. Tzanakakis ◽  
Anastasia Beketova ◽  
Lambrini Papadopoulou ◽  
Eleana Kontonasaki ◽  
Ioannis G. Tzoutzas
Keyword(s):  
Femtosecond Laser ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Tetragonal Zirconia ◽  
Treated Group ◽  
Glass Beads ◽  
Surface Treatments ◽  
Dihydrogen Phosphate ◽  
Promising Alternative

Background: currently applied surface treatments for zirconia bonding may create undesired microcracks and surface flaws. The aim of the present study was to evaluate the efficacy of alternative surface treatments on the shear bond strength of high translucency zirconia to 10-Methacryloyloxydecyl dihydrogen phosphate (MDP)-containing resin-based cement. Methods: fifty disk-shaped specimens (10 mm × 5 mm) were fabricated from a commercial yttria-stabilized zirconia with 5 mole% yttrium oxide tetragonal zirconia polycrystal (5Y-TZP), and underwent air-abrasion with alumina particles (50 μm-AL50 and 90 μm-AL90), glass beads (GB 10–60 μm), and ablation with femtosecond laser (FEMTO). Shear bond strength was evaluated with a universal testing machine under a crosshead speed of 0.5 mm/min until fracture. Fracture type was evaluated with an optical stereomicroscope. Differences among groups were evaluated by one-way ANOVA and Bonferroni pairwise comparison tests (p < 0.05). Results: the highest shear bond strength values were presented by the laser treated group (23.97 ± 3.7 MPa). No statistically significant differences were found among the Cl, Al50, Al90 and FEMTO groups. The lowest mean value was presented by the glass-beads treated group (11.93 ± 2.88 MPa) which was significantly lower compared to all other groups (p < 0.001). Conclusions: under the limitations of this in vitro study, femtosecond laser treatment of High-translucent monolithic zirconia (HTZ) ceramics is a promising alternative method for the mechanical retention of resin cements.

scholarly journals Development of Dental Poly(methyl methacrylate)-Based Resin for Stereolithography Additive Manufacturing

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4435
Author(s):  
Kentaro Hata ◽  
Hiroshi Ikeda ◽  
Yuki Nagamatsu ◽  
Chihiro Masaki ◽  
Ryuji Hosokawa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Flexural Strength ◽  
Bond Strength ◽  
Methyl Methacrylate ◽  
Vickers Hardness ◽  
Water Sorption ◽  
Shear Bond Strength ◽  
Dental Applications

Poly(methyl methacrylate) (PMMA) is widely used in dental applications. However, PMMA specialized for stereolithography (SLA) additive manufacturing (3D-printing) has not been developed yet. This study aims to develop a novel PMMA-based resin for SLA 3D-printing by mixing methyl methacrylate (MMA), ethylene glycol dimethacrylate (EGDMA), and PMMA powder in various mixing ratios. The printability and the viscosity of the PMMA-based resins were examined to determine their suitability for 3D-printing. The mechanical properties (flexural strength and Vickers hardness), shear bond strength, degree of conversion, physicochemical properties (water sorption and solubility), and cytotoxicity for L929 cells of the resulting resins were compared with those of three commercial resins: one self-cured resin and two 3D-print resins. EGDMA and PMMA were found to be essential components for SLA 3D-printing. The viscosity increased with PMMA content, while the mechanical properties improved as EGDMA content increased. The shear bond strength tended to decrease as EGDMA increased. Based on these characteristics, the optimal composition was determined to be 30% PMMA, 56% EGDMA, 14% MMA with flexural strength (84.6 ± 7.1 MPa), Vickers hardness (21.6 ± 1.9), and shear bond strength (10.5 ± 1.8 MPa) which were comparable to or higher than those of commercial resins. The resin’s degree of conversion (71.5 ± 0.7%), water sorption (19.7 ± 0.6 μg/mm3), solubility (below detection limit), and cell viability (80.7 ± 6.2% at day 10) were all acceptable for use in an oral environment. The printable PMMA-based resin is a potential candidate material for dental applications.

scholarly journals Bonding of Y-TZP to Dentin: Effects of Y-TZP Surface Conditioning, Resin Cement Type, and Aging

2014 ◽  
Vol 39 (3) ◽  
pp. 291-300 ◽  
Author(s):  
MA Bottino ◽  
C Bergoli ◽  
EG Lima ◽  
SMS Marocho ◽  
RO Souza ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Tetragonal Zirconia ◽  
Acrylic Resin ◽  
Surface Treatments ◽  
Resin Cement ◽  
Occlusal Plane ◽  
Resin Cements ◽  
And Storage ◽  
Tetragonal Zirconia Polycrystal

SUMMARY Purpose To evaluate the effects of two surface treatments, aging, and two resin cements on shear bond strength between dentin and yttrium-stabilized tetragonal zirconia polycrystal ceramic (Y-TZP). Materials and Methods Eighty human molars were embedded in acrylic resin and sectioned 3 mm below the occlusal plane. These teeth and 80 cylindrical Y-TZP specimens (height, 4 mm; diameter, 3.4 mm) were divided into eight groups (n=10) using the following factors: Y-TZP surface treatment (Vi: low-fusing porcelain [vitrification] + hydrofluoric acid etching + silanization or Si: tribochemical silicatization); cementation strategies (PF: Panavia or CC: Clearfil); and storage (nonaging or aging). Bonding surfaces of 40 Y-TZP specimens received Vi treatment, and the rest received Si treatment. Half of the ceramic-tooth assemblies were cemented with Panavia, the rest with Clearfil. Shear tests were executed using 0.4-mm–thick wire at 0.5 mm/min. Data were analyzed by three-way analysis of variance and Tukey test (α=0.05). Fractures were analyzed. Results Y-TZP surface treatments did not affect bond strength (p=0.762, Vi = Si), while resin cements (p&lt;0.001, Panavia &gt; Clearfil) and aging (p=0.006, nonaging &gt; aging) showed a significant effect. Most failures were in adhesive at dentin-cement interfaces; no failure occurred between zirconia and cement. Conclusion When Y-TZP ceramic is bonded to dentin, the weakest interface is that between dentin and resin cement. The resin cement/Y-TZP interface was less susceptible to failures, owing to Y-TZP surface treatments.

scholarly journals Effect of Low-Concentration Hydrofluoric Acid Etching on Shear Bond Strength and Biaxial Flexural Strength after Thermocycling

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1409
Author(s):  
You-Jung Kang ◽  
Yooseok Shin ◽  
Jee-Hwan Kim
Keyword(s):  
Phase Transformation ◽  
Flexural Strength ◽  
Bond Strength ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Tetragonal Zirconia ◽  
Resin Cement ◽  
Air Abrasion ◽  
Biaxial Flexural Strength ◽  
Group A

This study evaluated the shear bond strength (SBS) and biaxial flexural strength (BFS) of resin cements according to the surface treatment method using low-temperature hot etching with hydrofluoric acid (HF) on a yttrium-stabilized tetragonal zirconia (Y-TZP) surface; 96 discs and 72 cubes for BFS and SBS tests for Y-TZP were randomly divided into four groups of BFS and three groups of SBS. Specimens were subjected to the following surface treatments: (1) no treatment (C), (2) air abrasion with 50 μm Al2O3 particles (A), (3) hot etching with HF at 100 °C for 10 min (E), and (4) air abrasion + hot etching (AE). After treatments, the specimens were coated with primer, and resin cement was applied with molds. The specimens were evaluated for roughness (Ra) via scanning electron microscopy and x-ray diffraction, and the data were analyzed by an analysis of variance (ANOVA) and Kruskal–Wallis tests. Group E produced significantly higher SBS compared to group A and AE before and after thermocycling. The BFSs of all groups showed no significant differences before thermocycling; however, after thermocycling, C and E treatment groups were significantly higher compared to group A and AE. All groups showed phase transformation. Group E was observed lower monoclinic phase transformation compared to other groups.

scholarly journals Physical properties of two bis-acryl interim materials: color stability, flexural strength and shear bond strength to flowable composite resin as add-on material

2017 ◽  
Vol 16 ◽  
pp. 1-8 ◽  
Author(s):  
Leonardo Fernandes da Cunha ◽  
Ana Beatriz Franco Fernandes ◽  
Amanda Mahammad Mushashe ◽  
Gisele Maria Correr ◽  
Carla Castiglia Gonzaga
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Color Stability ◽  
Composite Resins ◽  
Bending Test ◽  
Distilled Water ◽  
Flowable Composite

The objective of this study was to evaluate the mechanical properties of two bis-acryl interim resin materials, such as color stability, flexural strength and shear bond strength to flowable composite resin, simulating clinical situations when this material has to be used for repair as add-on. Two shades of two bis-acryl interim resin materials [Structur 2 SC (shades Bleach and A2); Protemp 4 (shades A1 and A2)] were evaluated. Discs (5 x 1 mm) were fabricated and baseline color was determined after 1 h. Ten specimens were immersed at 37oC in solutions of distilled water (control) and cola-based soft drink (Coca-Cola). Color measurements were performed with a spectrophotometer using CIELab parameters. Color readings were again measured after 2 hours, 4 hours, 24 hours and 7 days. Flexural strength was determined using the three-point bending test (10 x 1 x 2 mm) on a universal testing machine (0.5 mm/min) (n = 10). Discs of bis-acryl resin were embedded in acrylic resin, planned and distributed in 2 groups: G1 - Filtek Z350 Flow/Protemp4 and G2 - Grandio SO Flow/Structure 3 (n = 15). Cylinders (3.5 x 2 mm) were made with the flowable composite resins and polymerized for 20 s. The specimens were stored in distilled water at 37oC for 24 h and subjected to shear bond strength test. Data were analyzed using one-way ANOVA and Tukey’s test ( = 0.05). ΔE values were higher for Structur Bleach (3.08)a compared with Protemp 4 (shade A1, 2.22)b (shade A2, 2.25)b. There were no significant differences between Structur Bleach and Structur A2 (2.62)ab. Coca-Cola presented higher ΔE values (3.08)a than (2.00)b. Regarding time, ΔE values increased from 1.84a after 2 h to 2.31b after 4 h. The higher values were observed after 24 h and 7 days (2.93c and 3.09d, respectively). No significant differences were observed for the flexural strength of Structur (22.05 MPa)a and Protemp 4 (19.01 MPa)a. The repairs executed with Structur/Grandio flow (9.21 MPa)a were similar to those performed with Protemp 4/Z350XT flow (10.71 MPa)a. It can be concluded that the two bis-acyl resins evaluated showed similar physical and mechanical properties.

Evaluation of flexural strength and shear bond strength of repaired microhybrid composite with varied surface treatments

2012 ◽  
Vol 5 (4) ◽  
pp. 164-168
Author(s):  
Sunit K. Jurel ◽  
Raghuwar Dayal Singh ◽  
Durga Shanker Gupta ◽  
Pooran Chand ◽  
Ramashanker Siddhartha
Keyword(s):  
Flexural Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Surface Treatments

scholarly journals Influence of irradiation with Er:YAG laser on the shear bond strength of a resin cement to feldspathic ceramic - in vitro study

Cerâmica ◽  
2015 ◽  
Vol 61 (358) ◽  
pp. 244-250 ◽  
Author(s):  
M. C. Loffredo ◽  
F. S. Hanashiro ◽  
W. Steagall Júnior ◽  
M. N. Youssef ◽  
W. C. de Souza-Zaroni
Keyword(s):  
Bond Strength ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Surface Treatments ◽  
Resin Cement ◽  
Air Abrasion ◽  
Yag Laser

<p>Although several conventional surface treatments have been used on feldspathic ceramic, a few studies investigated the effects of the irradiation with Er: YAG laser using different parameters. The aim of this in vitro study was to evaluate the shear bond strength of a resin cement to feldspathic ceramic, after the application of different surface treatments, especially the irradiation with Er:YAG laser. Forty-two discs made of a feldspathic ceramic were divided into six groups (n = 7): G1: control group - 10% hydrofluoric acid (HF), G2: Air abrasion with Al2O3 + HF; G3: Er: YAG laser with 500 mJ/4Hz, G4: Er: YAG laser with 500 mJ/4Hz: + HF; G5: Er: YAG laser with 400 mJ/6Hz and G6: Er:YAG laser with 400 mJ/6Hz + HF. After this, all the specimens were treated with silane, and then a resin cement cylinder was built on the treated ceramic surface. After 24 h at 37 oC, specimens were submitted to the shear bond strenght test and stereoscopic evaluation to determine the type of failure. The mean bond strength values (MPa) obtained were: G1 - 17.55, G2 - 18.80, G3 - 21.80, G4 - 12.62, G5 - and 15.81 G6- 11.59. After performing the ANOVA and Tukey's test, it was concluded that the group irradiated with Er:YAG laser at 500mJ/4Hz performed similarly to the groups that received the conventional treatments, such as hydrofluoric acid etching and the combination of air abrasion plus hydrofluoric acid, and was higher than the other groups irradiated with Er:YAG laser.</p>

Shear bond strength of metal/ceramic Interface after different surface treatments: an in vitro study. Resistência ao cisalhamento da interface metal/cerâmica após diferentes tratamentos de superfície: estudo in vitro

2013 ◽  
Author(s):  
Sílvia Fontes Do Amaral Pereira
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Surface Treatments ◽  
Vitro Study ◽  
Metal Ceramic

O objetivo do presente estudo in vitro foi verificar, através de teste de cisalhamento, a resistência de união da liga Wironia®light, à base de níquel-cromo sem berílio, sujeita a diferentes tratamentos de superfície, às cerâmicas Vita VM13 e Noritake. Foram confeccionados oitenta espécimes cilíndricos metálicos, com o auxílio de uma matriz de aço, nas dimensões de 4 mm de diâmetro por 4 mm de altura. Os espécimes foram divididos em oito grupos (n=10), de acordo com o tipo de tratamento superficial aplicado à liga metálica e com o tipo de cerâmica testada. Estes foram avaliados de acordo com os critérios de resistência ao cisalhamento e, com o auxílio de microscopia óptica, foi avaliada a área de cerâmica remanescente aderida ao metal após a fratura. Os corpos-de-prova do G6 (fabricados em Cerâmica Noritake com jateamento-26,401 ± 11,637 MPa) apresentaram maior resistência ao cisalhamento (p> 0,05) enquanto que os menores valores foram registrados no G4 (Cerâmica Vita com utilização de broca-13,440 ± 7,766 MPa). G6 (19425,4 μm2) apresentou a maior área de cerâmica aderida ao metal (p> 0,05) enquanto que o G4 (2310,2 μm2) apresentou a menor área. Concluiu-se que G6 obteve os valores mais altos de resistência ao cisalhamento e de remanescente cerâmico aderido à superfície metálica enquanto que o G4 obteve os valores mais baixos. Descritores: Restaurações metalo-cerâmicas; ligas de níquel-cromo;porcelana dentária.

Sign in / Sign up

Export Citation Format

Share Document