Influence of a bonding agent on the bond strength between a dental Co-Cr alloy and nine different veneering porcelains

2016 ◽  
Vol 61 (5) ◽  
Author(s):  
Hassan Al Bakkar ◽  
Sebastian Spintzyk ◽  
Christine Schille ◽  
Ernst Schweizer ◽  
Jürgen Geis-Gerstorfer ◽  
...  
Keyword(s):  
Bond Strength ◽  
Bonding Agent ◽  
Adhesive Failure ◽  
Cobalt Chromium ◽  
Huge Number ◽  
Bonding Agents ◽  
Metal Ceramic ◽  
Main Factor

AbstractAdequate bonding between dental veneering porcelains and non-precious metal alloys is a main factor for the long-term functionality of porcelain fused to metal restorations. Although a huge number of veneering porcelains are on the market, only few studies have reported about the role of bonding agents for the bond strength at their respective interface to cobalt-chromium (Co-Cr). The aim of this study was to compare the influence of a metal-ceramic bonding agent for Co-Cr alloys on the bond strength of metal-ceramic systems. The bond strength test was done according to ISO 9693 with additional detection of the first acoustic crack initiated signal while testing. The bonding agent had only minor effects on the bond strength of the different Co-Cr/ceramic systems. Only three of the nine studied systems showed statistically significant differences (p<0.05) upon applying the bonding agent. Scanning electron microscopy (SEM) showed cracks predominantly caused by adhesive failure. Based on this study, Co-Cr alloys veneered with porcelains with and without a bonding agent exceeded the minimum bond strength of 25 MPa required according to ISO 9693. However, if bond strength values based on acoustic signals were calculated, values below the threshold of 25 MPa could be observed. Such findings are important for failures caused by the occurrence of early cracks.

scholarly journals Effect of Dentin Pretreatment with Chlorhexidine on Push-Out Bond Strength of Composite Restorations in Severely Damaged Primary Anterior Teeth

2020 ◽  
Author(s):  
Shabnam Milani ◽  
Bahman Seraj ◽  
Zahra Khoshlafz ◽  
Niusha Abazarian
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Bonding Agent ◽  
Bonding Agents ◽  
Composite Restorations ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Self Etch ◽  
Push Out

Objectives: Achieving durable restorations with adequate strength in severely damaged primary anterior teeth in children is a priority. The aim of this study was to investigate the effect of dentin pretreatment with chlorhexidine on push-out bond strength of composite restorations. Materials and Methods: In this in vitro experimental study, 56 extracted primary anterior teeth were randomly divided into 4 groups: (1) saline and total-etch bonding agent, (2) chlorhexidine and total-etch bonding agent, (3) saline and self-etch bonding agent, and (4) chlorhexidine and self-etch bonding agent. After the application of bonding agents, the post space was filled with Z250 composite resin. Following thermocycling of the samples, the push-out test was performed using a universal testing machine, and the results were analyzed with two-way ANOVA. Results: The mean push-out bond strength values in groups 1 to 4 were 5.7, 8.39, 5.35, and 7 MPa, respectively. Chlorhexidine groups had significant differences with saline groups in bond strength (P<0.05) but there was no statistically significant difference between the self-etch and total-etch bonding agents in the groups (P>0.05). Conclusion: Both types of bonding agents (self-etch and total-etch) exhibited favorable results in radicular dentin of primary anterior teeth; however, pre-treatment with chlorhexidine increased the push-out bond strength of composite restorations in primary anterior teeth.

The Effect of Cooling Times on the Bonding Between Porcelain and Metal Alloys Fabricated by Different Techniques: In Vitro Study

2021 ◽  
pp. 232020682110371
Author(s):  
Emine Ünal ◽  
Faik Tugut
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Laser Sintering ◽  
Cobalt Chromium ◽  
Slow Cooling ◽  
Ceramic Samples ◽  
Metal Framework ◽  
Metal Ceramic ◽  
Bond Strengths ◽  
Fast Cooling

Aim: The aim of this study was to evaluate the effect of different cooling times on shear bond strength between cobalt–chromium metal frameworks fabricated by different techniques and veneering porcelain. Materials and Methods: One hundred twenty cobalt–chromium metal ceramic samples were obtained by three different techniques (casting, milling, and laser sintering). During the porcelain firing, fast and slow cooling protocols were applied. Ten specimens from each group were determined for all groups. The shear bond strength of the metal ceramic samples was measured by a universal testing machine with a constant crosshead speed of 0.5 mm/min. One sample from each group was evaluated by the scanning electron microscopy analysis in terms of surface change and fracture morphology. Variance analysis and Tukey test were used to analyze statistically significant differences between groups. Results: It was seen that the difference between the bond strengths of the metal frameworks obtained by different techniques was statistically significant ( P < .05). All groups except for difference between the bond strengths of all the frameworks metal groups with G-Ceram porcelain were statistically significant ( P < .05). The best bond strengths that were statistically significant were fast cooling G-Ceram (19.65 ± 2.65 MPa) with metal frameworks fabricated by laser sintering, fast cooling with metal framework fabricated by milling Noritake (19.17 ± 2.91 MPa), and the metal framework fabricated by casting was found to be slow cooling Noritake (12.99 ± 2.08 MPa) were seen. Conclusion: The porcelain cooling times had significant effect on the shear bond strength of porcelain to casting, milling and laser sintering alloys.

scholarly journals The influence of different surface treatment protocols and bonding agents on the repair microtensile bond strength of six-month’ aged composite: An in vitro study

2020 ◽  
Vol 23 (4) ◽  
pp. 9p
Author(s):  
Reham S Saleh ◽  
Engie M Safwat
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
In Vitro Study ◽  
Mode Analysis ◽  
Adhesive Failure ◽  
Microtensile Bond Strength ◽  
Treatment Protocols ◽  
Bonding Agents ◽  
Aged Composite

Objective: to compare the effect of three surface treatment protocols and two intermediate agents on repairing aged composite, regarding microtensile bond strength (µTBS) and mode of fracture, at two time intervals. Material and methods: Six-month aged microhybrid composite blocks, were randomly distributed into three groups, subjected to; Fine, Super Fine grit diamond burs or Erbium- Yag Laser surface treatment. Each block had both One Coat bond SL (Bond) and Brilliant Flow flowable composite (Flow) intermediate agents, alongside. Blocks were incrementally repaired using nanohybrid composite, cut into beams, then randomly subjected either immediately (IM) to µTBS test or after thermocycling (TC) for 5000 cycle. Mode of failure was determined using stereomicroscope. Data were analyzed through three-way ANOVA followed by pairwise comparison with Bonferroni correction. Kruskal Wallis test compared groups for failure mode analysis (?=0.05)Results: Super Fine grit showed the highest mean µTBS compared to control for both intermediate agents, IM and after TC at P<0.05. No difference between Fine grit and Laser application for all groups (P>0.05). IM, Bond showed the highest µTBS compared to TC, Flow for all tested groups. Beams roughened with Fine and Super Fine burs showed significantly lower adhesive failures than those roughened with Laser. Flow suffers significantly higher adhesive failure than those with Bond. For TC tested groups; beams with Super Fine bur and Bond showed significantly lower adhesive failure at P=0.029.Conclusions: Super Fine grit and Bond provide the highest µTBS and the least adhesive failure; moreover TC resulted in significant decrease in µTBS.

scholarly journals Different bonding agents effect on adhesive bond strength: lithium disilicate glass ceramic

2020 ◽  
Vol 49 ◽  
Author(s):  
Marcos Daniel Septímio LANZA ◽  
Walisson Arthuso VASCONCELLOS ◽  
Giovani Lana Peixoto de MIRANDA ◽  
Rogéli Tibúrcio Ribeiro da Cunha PEIXOTO ◽  
Lincoln Dias LANZA
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Glass Ceramic ◽  
Shear Bond Strength ◽  
Adhesive Bond ◽  
Lithium Disilicate ◽  
Bonding Agent ◽  
Polished Surface ◽  
Bonding Agents ◽  
Adhesive Bond Strength

Abstract Introduction The silanization of the ceramic surface prior to applying the adhesive and/or resinous materials plays an important role in bond strength. Nowadays, a new family of adhesive systems has been introduced into the market, aiming to simplify the technique of adhesive procedures during cementation. Objective To investigate the effectiveness of different bonding agents containing silane and primer on Lithium Disilicate Glass Ceramic (LD) surface by shear bond strength tests. Material and method 130 LD ceramic blocks were included in acrylic resin, polished and washed in ultrasound for 10 minutes. The specimens were divided into 2 groups according to surface treatment: Polished Surface (PS); Hydrofluoric Acid 9.5% - 20s (HF). Each group was divided into 5 subgroups (n = 13) according to bonding agent type: metallic primer containing MDP (ZPrimePlus, Bisco Inc); two traditional silanes (MonobondPlus, IvoclarVivadent / Porcelain Prime, Bisco Inc.); mixture of silane and resin (Kerr Silane, Kerr); mixture of silane and universal adhesive (Single-bond Universal, 3M Espe). The specimens were mounted in a standard device for shear testing (UltradentBonding Assembly), cemented with dual resin cement (RelyX UltimateTM, 3M Espe.) and photo-polymerized for 20s. The samples were tested after 24 hours and 3 months of storage in distilled water at ±36 °C. The data were analyzed by 3-Way Anova and Tukey's test (α = 5%). Result Shear bond strength (SBS) was significantly influenced by surface treatment, bonding agent used and storage (p <0.001). Conclusion Adequate adhesive bond strength to Lithium Disilicate Glass Ceramic can be obtained with traditional silanes, combined with HF acid pretreatment surface.

Numerical Model of Bond Strength Measurements

1989 ◽  
Vol 159 ◽  
Author(s):  
Gerald L. Nutt
Keyword(s):  
Free Surface ◽  
Numerical Model ◽  
Bond Strength ◽  
Metal Film ◽  
Surface Velocity ◽  
Free Surface Velocity ◽  
Metal Ceramic ◽  
Ceramic Interfaces ◽  
Bond Region

ABSTRACTWe have reported bond strength measurements of metal/ceramic interfaces using shock waves to separate the bond by spallation[1,2]. The technique relies on the interpretation of the free surface velocity of the metal film as it is spalled from the substrate.We answer several questions relating to the details of the interaction of the shock with the interface. Specifically, we examine the role of sound speeds in the measurements. We also calculate the plastic strain in the the bond region and verify the theory relating to the jumpoff velocity of the scab to the bond strength.

scholarly journals Simplified Acid Treatment Technique in Cobalt-Chromium Alloys: Effect on Metal-Ceramic Bond Strength

2021 ◽  
Vol 24 (6) ◽  
Author(s):  
Michelli Menezes Sobreiro ◽  
Ana Paula Macedo ◽  
Osvaldo Luiz Bezzon ◽  
Valéria Oliveira Pagnano
Keyword(s):  
Bond Strength ◽  
Acid Treatment ◽  
Treatment Technique ◽  
Cobalt Chromium ◽  
Chromium Alloys ◽  
Ceramic Bond ◽  
Metal Ceramic

scholarly journals The effect of a bonding agent and thermo-mechanical cycling on the bond strength of a glass-ceramic to gold and cobalt-chromium alloys

2014 ◽  
Vol 2 (1) ◽  
pp. 16 ◽  
Author(s):  
Flávia Trindade ◽  
Lilian Anami ◽  
Júlia da Costa Lima ◽  
Luis Gustavo de Vasconcellos ◽  
Ivan Balducci ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Ceramic ◽  
Bonding Agent ◽  
Cobalt Chromium ◽  
Mechanical Cycling ◽  
Chromium Alloys

scholarly journals Influence of Immediate Dentin Sealing on the Shear Bond Strength of Pressed Ceramic Luted to Dentin with Self-Etch Resin Cement

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Robert Dalby ◽  
Ayman Ellakwa ◽  
Brian Millar ◽  
F. Elizabeth Martin
Keyword(s):  
Bond Strength ◽  
Glass Ceramic ◽  
Shear Bond Strength ◽  
Bonding Agent ◽  
Bonding Agents ◽  
Dentin Bonding ◽  
Dentin Surface ◽  
Dentin Bonding Agents ◽  
Group A ◽  
Dentin Bonding Agent

Objectives. To examine the effect of immediate dentin sealing (IDS), with dentin bonding agents (DBAs) applied to freshly cut dentin, on the shear bond strength of etched pressed ceramic luted to dentin with RelyX Unicem (RXU) cement.Method. Eighty extracted noncarious third molars were ground flat to expose the occlusal dentin surfaces. The teeth were randomly allocated to five groups (A to E) of sixteen teeth each. Groups A to D were allocated a dentin bonding agent (Optibond FL, One Coat Bond, Single Bond, or Go!) that was applied to the dentin surface to mimic the clinical procedure of IDS. These specimen groups then had etched glass ceramic discs (Authentic) luted to the sealed dentin surface using RXU. Group E (control) had etched glass ceramic discs luted to the dentin surface (without a dentin bonding agent) using RXU following the manufacturer’s instructions. All specimens were stored for one week in distilled water at room temperature and then shear stressed at a constant cross-head speed of 1 mm per minute until failure. Statistical analysis was performed by ANOVA followed by post hoc Tukey HSD method () applied for multiple paired comparisons.Results. The shear bond strength results for group A to E ranged from to  MPa. One-way ANOVA demonstrated a difference () between the groups tested and the Tukey HSD demonstrated a significant () difference between the shear bond strength (SBS) of Optibond FL (Group A) and Go! (Group D). There was no statistical difference () in the SBS between the test groups (A–D) or the control (group E).Conclusion. IDS using the dentin bonding agents tested does not statistically () affect the shear bond strength of etched pressed ceramic luted to dentin with RXU when compared to the control.

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