scholarly journals Composite resin repairs: What is the most effective protocol?

2017 ◽  
Vol 20 (1) ◽  
pp. 99
Author(s):  
Alessandra Pereira Andrade ◽  
Angela Mayumi Shimaoka ◽  
Rubens Corte Real de Carvalho
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Composite Resin ◽  
Surface Treatments ◽  
Bonding Agent ◽  
Etch And Rinse ◽  
Silane Coupling ◽  
One Step ◽  
Self Etch

Objective: The objective of this study was to evaluate the combination effect of surface treatments and bonding agents on bond strength of repairs on aged composite resin. Materials and Methods: One hundred twenty microhybrid composite units (Filtek Z250) aged in distilled at 37ºC water for six months were submitted to different surface treatment prior to resin repairs. Ten specimens were randomly divided into 12 groups: non-treated/no bonding agent (negative control), sandblasting /no bonding agent, silane/no bonding agent, non-treated/ etch-and-rinse; non-treated/one-step self-etch; non-treated/ two-step self-etch; sandblasting/etch-and-rinse; sandblasting/one-step self-etch; sandblasting/two-step self-etch; silane coupling agent/etch-and-rinse; silane coupling agent/ one-step self-etch; silane coupling agent/two-step self-etch. Microshear testing was performed to bond strength assessment. Results: Two-way ANOVA and Tukey’s test (α=0.05) demonstrated significant difference between the surface treatments and adhesive systems. Only no treated surface/etch-and-rinse group showed lower bond strength values when compared to other groups. Conclusion: The considered surface treatments were capable to increase the effectiveness of the repair in composite resin when using the adhesive etch-and-rinse.

scholarly journals Acid Etching and Surface Coating of Glass-Fiber Posts: Bond Strength and Interface Analysis

2016 ◽  
Vol 27 (2) ◽  
pp. 228-233 ◽  
Author(s):  
Doglas Cecchin ◽  
Ana Paula Farina ◽  
Rafael Pino Vitti ◽  
Rafael Ratto Moraes ◽  
Ataís Bacchi ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Glass Fiber ◽  
Coupling Agent ◽  
Surface Coating ◽  
Silane Coupling Agent ◽  
Failure Modes ◽  
Composite Resin ◽  
Silane Coupling ◽  
Unfilled Resin

Abstract The aim of this study was to evaluate the bond strength of a composite resin to glass-fiber post (GFP) treated or not with phosphoric acid, silane coupling agent, and unfilled resin. GFPs were etched or not with 37% phosphoric acid and different surface coating applied: silane coupling agent, unfilled resin, or both. Composite resin blocks were built around a 4-mm height on the GFP. Unfilled resin (20 s) and composite resin (40 s) were light activated by a light-emitting diode unit. The specimens were stored in distilled water at 37 °C for 24 h. Microtensile bond test was performed using a mechanical testing machine until failure (n=10). The data were analyzed using two-way ANOVA followed by Student-Newman-Keuls' test (p<0.05). Failure modes were classified as adhesive, mixed, or cohesive failures. Additional specimens (n=3) were made to analyze the bonded interfaces by scanning electron microscopy. The statistical analysis showed the factor 'surface coating' was significant (p<0.05), whereas the factor 'HP etching' (p=0.131) and interaction between the factors (p=0.171) were not significant. The highest bond strength was found for the silane and unfilled resin group (p<0.05). A predominance of adhesive and cohesive failures was found. Differences regarding the homogeneity and thickness of the unfilled resin layer formed by different GFP surface treatments were observed. The application of silane and unfilled resin can improve the bond strength between GFP and resin composite.

scholarly journals Effect of Various Surface Treatments on Push-out Strength of Glass Fiber Posts–An In Vitro Study

2018 ◽  
Vol 06 (01) ◽  
pp. 028-033
Author(s):  
Navjot Kaur ◽  
Manjit Kumar ◽  
Amrit Khosla ◽  
Ritu Batra ◽  
Sumit Katoch
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Surface Treatments ◽  
Fiber Posts ◽  
Silane Coupling ◽  
Glass Fiber Posts ◽  
Push Out ◽  
Agent Group

Abstract Aim The aim of this study was to investigate push-out bond strength of glass fiber posts after various surface treatments and to investigate push-out bond strength at different levels of root (coronal, middle, apical). Materials and Methods Forty extracted teeth were selected for study (maxillary anteriors and mandibular premolars). Roots were sectioned 16 mm from apex, endodontically treated and divided into four groups of 10 each based on surface treatment of posts; Group I (Control Group): No treatment of the post, Group II: Post surface were sandblasted and then treatment with silane coupling agent, Group III: Hydrofluoric acid application on the post surface and then treatment with silane coupling agent, Group IV: Post surface treated with 37% phosphoric acid treatment for 1 minute. Posts after various surface treatments were luted. Roots were then cut into three sections coronal, middle, and apical. The push-out test was done to assess push-out bond strength. The data obtained were statistically analyzed. Results Hydrofluoric acid and silane coupling agent treatment had little effect on the bond strength of post. Sandblasting and silane coupling agent was proven to be more effective and improved push-out strength of glass fiber posts followed by phosphoric acid group. Conclusion It was concluded that sandblasting followed by silane coupling agent showed highest bond strength in all parts of the root compared with other surface treatments. Highest push-out strength was found at the coronal level of the root followed by middle and apical level.

scholarly journals Effect of adhesive mode and chlorhexidine on microtensile strength of universal bonding agent to sound and caries-affected dentins

2018 ◽  
Vol 12 (04) ◽  
pp. 553-558 ◽  
Author(s):  
Joyce Figueiredo Macedo de Lima ◽  
Danielle Wajngarten ◽  
Fariya Islam ◽  
Johanna Clifford ◽  
Ana Carolina Botta
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Composite Resin ◽  
High Viscosity ◽  
Bonding Agent ◽  
Third Molars ◽  
Microtensile Bond Strength ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Self Etch

ABSTRACT Objective: The main objective of this study is to assess the effect of the adhesive mode and chlorhexidine (CHX) on the microtensile strength of a universal bonding agent to sound and caries-affected dentins. Materials and Methods: Six intact third molars and six decayed third molars were sectioned to obtain two middle dentin specimens per tooth. Prime and Bond Elect Universal (Dentsply) was applied to specimens in two different modes: Etch-and-rinse (ER, phosphoric acid for 15s) and self-etch (SE, no phosphoric acid). 2% CHX (Cavity Cleanser, Bisco) was applied to both dentins for 30 s. Specimens were randomly assigned into eight groups (n = 3) according to the treatments applied to sound and caries-affected dentins: SE; ER; SE + CHX; and ER + CHX. All specimens were restored with TPH Spectra High Viscosity (Dentsply) composite resin and sectioned to obtain specimens of 0.8 ± 0.1 mm2. The microtensile bond strength test was conducted at 1 mm/min. The data were statistically analyzed by ANOVA and multiple comparisons' test (α = 0.05). Results: There was no significant difference between sound dentin and caries-affected dentin (P = 0.132). The highest bond strength was obtained with the application of the ER (31.81MPa). SE + CHX promoted the lowest bond strength with no statistical difference to ER + CHX (P > 0.05). Conclusions: ER mode for the universal bonding agent yielded the highest bond strength to sound and caries-affected dentins. CHX reduced the bond strength to both dentins regardless the application of phosphoric acid. Clinical Significance: The universal bonding agent increased the bond strength to sound and caries-affected dentins when applied by the ER mode.

scholarly journals Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

2016 ◽  
Vol 27 (3) ◽  
pp. 303-308 ◽  
Author(s):  
Thaís Fantinato Trindade ◽  
Luana Kelle Batista Moura ◽  
Walter Raucci Neto ◽  
Danielle Cristine Furtado Messias ◽  
Vivian Colucci
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Sodium Ascorbate ◽  
Control Groups ◽  
Universal Adhesive ◽  
Bleaching Procedure ◽  
Etch And Rinse ◽  
One Step ◽  
Self Etch

Abstract This study evaluated the effect of restorative protocol with sodium ascorbate on the shear bond strength (SBS) of a universal adhesive to intracoronal bleached dentin. One hundred-and-twenty bovine dentin fragments were randomly divided into 12 groups (n=10), according to the bleaching procedure (unbleached and bleached) and restorative protocol (no treatment, 10% sodium ascorbate -10SA, 35% sodium ascorbate -35SA and two-step etch-and-rinse -ER or one-step self-etch -SE Scotchbond universal adhesive approaches). Four whitening sessions were performed using 35% hydrogen peroxide. The samples from control groups were kept in relative humidity at 37 °C. Immediately after bleaching procedures, the assigned antioxidant solution was applied on dentin and restorative procedures were performed following either the ER or the SE approach. After 24 h, the specimens were subjected to SBS test. Data (MPa) were analyzed by ANOVA and Tukey's test (?=0.05). Lower SBS values were found for bleached specimens (8.54 MPa) compared with those unbleached (12.13 MPa) (p<0.05). The bond strength of the sodium ascorbate-treated groups was higher than those untreated, regardless of the strategy employed (p<0.05). Groups restored without sodium ascorbate showed lower bond strength values for both ER (8.32 MPa) and SE (8.28 MPa) adhesive strategies. The group treated with 10SA submitted to ER approach (10.14 MPa) was similar to untreated groups (p>0.05). It may be concluded that bond strength of composite resin to intracoronal dentin was affected by restorative protocol and reduced by bleaching.

scholarly journals Initial and long-term bond strengths of one-step self-etch adhesives with silane coupling agent to enamel-dentin-composite in combined situation

2015 ◽  
Vol 34 (5) ◽  
pp. 663-670 ◽  
Author(s):  
Teerapong MAMANEE ◽  
Masahiro TAKAHASHI ◽  
Masatoshi NAKAJIMA ◽  
Richard M. FOXTON ◽  
Junji TAGAMI
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Silane Coupling ◽  
One Step ◽  
Bond Strengths ◽  
Self Etch

scholarly journals Effect of Silane Type and Air-Drying Temperature on Bonding Fiber Post to Composite Core and Resin Cement

2014 ◽  
Vol 25 (3) ◽  
pp. 217-224 ◽  
Author(s):  
Camila Maria Peres de Rosatto ◽  
Marina Guimarães Roscoe ◽  
Veridiana Resende Novais ◽  
Murilo de Sousa Menezes ◽  
Carlos José Soares
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Room Temperature ◽  
Composite Resin ◽  
Resin Cement ◽  
Air Drying ◽  
Drying Temperature ◽  
Silane Coupling ◽  
Push Out

This study evaluated the influence of silane type and temperature of silane application on push-out bond strength between fiberglass posts with composite resin core and resin cement. One hundred and sixty fiberglass posts (Exacto, Angelus) had the surface treated with hydrogen peroxide 24%. Posts were divided in 8 groups according to two study factors: air-drying temperature after silane application (room temperature and 60 ºC) and silane type: three pre-hydrolyzed - Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE) and one two-component silane - Silane Coupling Agent (Dentsply). The posts (n=10) for testing the bond strength between post and composite core were centered on a cylindrical plastic matrix and composite resin (Filtek Z250 XT, 3M ESPE) that was incrementally inserted and photoactivated. Eighty bovine incisor roots (n=10) were prepared for testing the bond strength between post and resin cement (RelyX U100, 3M ESPE) and received the fiberglass posts. Push-out test was used to measure the bond strength. Data were analyzed by two-way ANOVA followed by Tukey's test (a=0.05). ANOVA revealed that temperature and silane had no influence on bond strength between composite core and post. However, for bond strength between post and resin cement, the temperature increase resulted in a better performance for Silane Coupling Agent, Silano and RelyX Ceramic Primer. At room temperature Silane Coupling Agent showed the lowest bond strength. Effect of the warm air-drying is dependent on the silane composition. In conclusion, the use of silane is influenced by wettability of resinous materials and pre-hydrolyzed silanes are more stable compared with the two-bottle silane.

scholarly journals Bond strength between fiber posts and composite resin core: influence of temperature on silane coupling agents

2012 ◽  
Vol 23 (1) ◽  
pp. 08-14 ◽  
Author(s):  
Veridiana Resende Novais ◽  
Paulo Cézar Simamotos Júnior ◽  
Regina Maria Puppin Rontani ◽  
Lourenço Correr-Sobrinho ◽  
Carlos José Soares
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Composite Resin ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Air Drying ◽  
Drying Temperature ◽  
Resin Core ◽  
Silane Coupling

This study evaluated the effect of air drying temperature and different silane coupling agents on the bond strength between glass fiber posts and composite resin core. The post surface was cleaned with alcohol and treated with different silane coupling agents, being three prehydrolyzed silanes [Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE)] and one two-component silane [Silane Coupling Agent (Dentsply)]. Two post-silanization air drying temperatures, 23ºC and 60ºC, were applied. A cylindrical plastic matrix was placed around the silanized post and filled with composite resin. Each bonded post provided 7 slices for push-out testing. Each slice was loaded to failure under compression at a cross-head speed of 0.5 mm/min. Data were analyzed by two-way ANOVA and Scott-Knott tests (α=0.05). Dunnett's test was used to compare the mean of the control group with that of each experimental group. Scanning electron microscopy (SEM) was used to evaluate the interface of the fractured slices. For the 23ºC air drying temperature, the use of RelyX Ceramic Primer resulted in significantly lower bond strength than the other silane coupling agents, while the bond strength with Silane Coupling Agent was the highest of all groups. Only with Silane Coupling Agent, the bond strength for the 23ºC air drying temperature was significantly higher than that for 60ºC air drying. In conclusion, the use of warm air drying after silane application produced no increase in the bond strength between the fiber-reinforced composite post and the composite core. The two-component silane produced higher bond strength than all prehydrolyzed silanes when it was used with air drying at room temperature.

scholarly journals EVALUATION OF PUSH-OUT BOND STRENGTH BETWEEN DIFFERENT SURFACE TREATED GLASS FIBER POSTS AND COMPOSITE

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Dr. Sundaresan Balagopal ◽  
Dr. Vandana James ◽  
Dr.M. Anisha Sebatni ◽  
Dr.Ramasamy Saravanan Gayathri ◽  
Dr.Bahavathi Ananthan Hemasathya ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Bonding Agent ◽  
Fiber Post ◽  
Silane Coupling ◽  
Glass Fiber Posts ◽  
Glass Fiber Post ◽  
Push Out

Aim: To evaluate the effect of push-out bond strength between different surface treated glass fiber posts and resin composite. Materials and Methods: Four Cylindrical Glass fiber post (GFP) of 1.3mm diameter were divided into four groups depending on the surface treatment of glass GFP. Group I– no surface treatment done for GFP, group II - silane coupling agent was applied to GFP, then coated with bonding agent, group III – GFP was etched with 37% phosphoric acid, then treated with silane coupling agent and later coated with bonding agent and group IV - GFP was etched with 5% hydrofluoric acid then treated with silane coupling agent and later coated with bonding agent. The surface treated posts were vertically stabilized in the centre of a matrix. Composite was filled circumferentially and incrementally and photo cured. It was then sectioned perpendicular to the vertical axis yielding ten 1.0mm thick discs per fiber post. Ten specimens per group were obtained. They were subjected to push-out bond strength using universal testing machine. One - way analysis of variance and Tukey’s test were performed to verify statistical differences between groups (P< 0.01). Results: Superior bond strength was seen in 5% hydrofluoric acid etched group. Etching with 37% phosphoric acid or silane coupling agent alone did not show significant difference. GFP without surface treatment showed least bond strength. Conclusion: Glass fiber posts should be etched with 5% hydrofluoric acid and treated with silane coupling agent before applying bonding agent for a better bond strength between composite and the GFP. Keywords: Glass fiber post, push-out bond strength, custom made glass fiber post.

Sign in / Sign up

Export Citation Format

Share Document