scholarly journals Microtensile Bond Strength of Methacrylate and Silorane Resins to Enamel and Dentin

2014 ◽  
Vol 25 (4) ◽  
pp. 327-331 ◽  
Author(s):  
Gisele Rodrigues da Silva ◽  
Isabela Sousa Araújo ◽  
Rodrigo Dantas Pereira ◽  
Bruno de Castro Ferreira Barreto ◽  
Célio Jesus do Prado ◽  
...  
Keyword(s):  
Bond Strength ◽  
Aging Time ◽  
Storage Time ◽  
Composite Resin ◽  
Glass Plate ◽  
Composite Resins ◽  
Microtensile Bond Strength ◽  
Bonding Interaction ◽  
Significant Difference ◽  
And Storage

The aim of this study was to evaluate the microtensile bond strength (µTBS) of two substrates (enamel and dentin) considering two study factors: type of composite resin [methacrylate-based (Filtek Supreme) or silorane-based (Filtek LS)] and aging time (24 h or 3 months). Twenty human molars were selected and divided into 2 groups (n=10) considering two dental substrates, enamel or dentin. The enamel and dentin of each tooth was divided into two halves separated by a glass plate. Each tooth was restored using both tested composite resins following the manufacturer's instructions. The samples were sectioned, producing 4 sticks for each composite resin. Half of them were tested after 24 h and half after 3 months. µTBS testing was carried out at 0.05 mm/s. Data were analyzed by three-way ANOVA and Tukey's HSD tests at α=0.05. Significant differences between composite resins and substrates were found (p<0.05), but no statistically significant difference was found for aging time and interactions among study factors. The methacrylate-based resin showed higher µTBS than the silorane-based resin. The µTBS for enamel was significantly higher than for dentin, irrespective of the composite resin and storage time. Three months of storage was not sufficient time to cause degradation of the bonding interaction of either of the composite resins to enamel and dentin.

scholarly journals Influence of increment thickness on microhardness and bond strength in composite resins

2021 ◽  
Vol 10 (9) ◽  
pp. e32810917974
Author(s):  
Isis Almela Endo Hoshino ◽  
Mariana de Oliveira Bachega ◽  
Paulo Henrique dos Santos ◽  
André Luiz Briso ◽  
Rodolfo Bruniera Anchieta
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Composite Resins ◽  
Third Molars ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Post Test ◽  
Knoop Microhardness ◽  
Nanohybrid Composite ◽  
New Generation

The aim of this study was to evaluate the Knoop microhardness and the microtensile bond strength of a second-generation of bulk-fill (BF) and a nanohybrid composite resins (NH) in different thicknesses of increments. For this, ninety disks of composite resin were made for Knoop microhardness, being divided into six groups (n = 15). The Knoop microhardness obtained in each millimeter of the internal face. For microtensile bond strength, ninety restored in third molars were used, divided into six groups (n = 15). For Knoop microhardness, the Wilcoxon and Friedman test was used. For the microtensile bond strength were used the Two-way Anova test and Tukey's post-test (p <0.05). The NH resin showed higher Knoop micro hardness than BF and it was observed that hardness value decreases as increases the thickness of the resin. There was no significant difference in microtensile bond strength comparing NH and BF. However, there was a significant difference between G2 and G4 for the NH groups, with the highest and lowest bond strength values, respectively. Thus, the new generation of the bulk-fill composite resin provided lower microhardness values as the thickness of the increments increases in comparison with the nanohybrid composite resin. The microtensile bond strength does not appear to have been influenced by the type of resin, or the thickness of the increment.

scholarly journals Influence of Water Aging on Microtensile Bond Strength of a Flowable and a Packable Bulk-fill Resin Composites to Dentin

2020 ◽  
Vol 8 (D) ◽  
pp. 112-117
Author(s):  
Ayah Atif Selim ◽  
Ahmed Fawzy Abo Elezz ◽  
Rehab Khalil Safy
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Resin Composite ◽  
Water Storage ◽  
Aging Effect ◽  
Mean Value ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Influence Of Water

AIM: Investigation of the aging effect on the microtensile bond strength (μTBS) of bulk-fill resin composite (RC) versus a conventionally incrementally applied one. MATERIALS AND METHODS: A total number of 45 sound human impacted third molars extracted molars have been selected to prepare specimens for the μTBS test. Teeth were randomly divided into three groups (C) according to type of RC material which used for restoring the teeth. Where nanohybrid RC (Grandio®SO) was used as the control Group (C1), packable bulk-fill RC (X-tra fil®) was used for restoring teeth in C2 group and flowable bulk-fill RC (X-tra base®) was used for restoring teeth in C3 group. Each group was further subdivided into 3 subgroups (n = 5) according to the water storage time, where in subgroup 1; teeth were stored for 24 h, subgroup 2; teeth were stored for 3 months while for subgroup 3; and teeth were stored for 6 months. After water storage, teeth were sectioned for preparation of μTBS testing beams. Maximum tensile stresses were recorded in megapascal (MPa). RESULTS: After 24 h of water storage, the X-tra base® showed a higher statistically significant μTBS to dentin (33.82 ± 9.84 MPa) than did the other two types of RCs. After 3 months, the X-tra fil® showed the lowest mean value of μTBS (10.90 ± 5.66 MPa), meanwhile, after 6 months of water storage Grandio®SO showed the highest mean value of μTBS (15.85 ± 6.76 MPa). Regardless of the time the X-tra fil® showed the lowest mean of μTBS (15.07 ± 11.73 MPa), while there is no significant difference between the X-tra base® and Grandio®SO. Furthermore, the water aging adversely affects μTBS values which deceased gradually by time. CONCLUSION: The packable bulk-fill RC characterized by lower μTBS to dentin in comparison to the flowable bulk fill and the incrementally applied nanohybrid RCs. Furthermore, the μTBS of the three tested materials decreased gradually by aging.

scholarly journals Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials

2014 ◽  
Vol 25 (6) ◽  
pp. 519-523 ◽  
Author(s):  
Erica Moreno Zanconato-Carvalho ◽  
João Felipe Bruniera ◽  
Natália Spadini de Faria ◽  
Vivian Colucci ◽  
Danielle Cristine Messias
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Composite Resins ◽  
Bleaching Procedure ◽  
Significant Difference ◽  
Restorative Materials

Surface treatment of dentin before the bleaching procedure may affect its permeability and influence the bond strength of restorative materials. This study evaluated the influence of surface treatment before the bleaching on shear bond strength (SBT) of restorative materials to intracoronal dentin. Dentin slabs were subjected to surface treatment: no bleaching (control - CON), no surface treatment + bleaching (HP), 37% phosphoric acid + bleaching (PA) and Er:YAG laser + bleaching (L). After the bleaching procedure, specimens (n=10) were restored with: microhybrid composite resin (MH), flowable composite resin (F), and resin-modified glass-ionomer cement (RMGIC). The shear test was carried out. ANOVA and Tukey's test (α=0.05) showed significant difference for surface treatment and restorative materials (p<0.05). CON presented higher STB and was statistically different from HP (p<0.05). PA and L showed intermediate values and were statistically similar to CON and HP (p>0.05). STB for MH and F were higher than RMGIC (p<0.05), and did not differ from each other (p>0.05). The surface treatments with phosphoric acid and Er:YAG laser before the bleaching procedure provided shear bond strength at the same level of unbleached dentin and the composite resins presented superior bond strength to the intracoronal dentin.

In Vitro Evaluation of Onlay Restorations on Primary Teeth

2017 ◽  
Vol 40 (12) ◽  
pp. 709-713
Author(s):  
Kadriye G.U. Güzel ◽  
Ayşe C. Altun ◽  
Zuhal Kirzioğlu
Keyword(s):  
Bond Strength ◽  
Primary Teeth ◽  
Composite Resin ◽  
Permanent Teeth ◽  
Primary Tooth ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Bond Strengths ◽  
Materials Used

Purpose Many novel materials have been developed such as composite resin, ceramic, zircon or metal-supported ceramic for use in aesthetic restoration of primary teeth and permanent teeth with extensive crown damage. The aim of the present study was to compare microtensile bond strengths on materials using the microtensile bond strength test. Materials and methods The microtensile bond strength on the primary tooth dentin was measured on extracted primary teeth using an indirect method and fracture patterns were evaluated. Results The analysis of bond strengths using the Mann-Whitney U-test did not show significant difference between the rank averages of the compomer and composite resin (p = 0.741). The dentin sections, from which test samples were obtained, contributed to the bond strength; dentin samples obtained just above the pulp had lower bond strength, and the difference was statistically significant (p = 0.005). The adhesive type fracture was the most prevalent fracture type for both materials. Conclusions When the chemical, physiological, and micromorphological differences between primary and permanent teeth are taken into consideration, the success of the materials used for restorations can be different between primary and permanent teeth. Therefore, materials used in the dentistry must be evaluated separately for primary teeth.

scholarly journals Bond strength of composite resin containing biomaterial S-PRG to eroded dentin

2017 ◽  
Vol 16 ◽  
pp. 1-10
Author(s):  
Alessandra Sanchez Coelho Lourenço ◽  
Ana Paula Almeida Ayres ◽  
Taís Fonseca Mantilla ◽  
Marcelo Giannini ◽  
Patricia Moreira de Freitas
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Optical Microscope ◽  
Fracture Pattern ◽  
Supersaturated Solution ◽  
Solution Ph ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Restorative Materials ◽  
Two Factors

Aim: To evaluate the bond strength of composite resin containing or not biomaterial (S-PRG) to sound/eroded dentine. Methods: Occlusal dentin of 30 human molars (n=15) had half of its surface kept uneroded, while on the other half an erosive lesion was produced by cycling in citric acid (pH 2.3) and supersaturated solution (pH 7.0). On both eroded (ED) and non-eroded (SD) substrates, two restorative systems (containing or not S-PRG) were tested. Composite resin cylinders were built and, after storage in water (24h), were submitted to bond strength test. The analysis of the fracture pattern was performed under an optical microscope (40x). The obtained values of bond strength (MPa) were submitted to ANOVA (two factors) and Tukey multiple comparisons tests (p<0.05). Results: According to the results, there was difference between substrates (<0.001) and restorative materials (p=0.002) evaluated. For the microtensile bond strength, the values obtained were: SDNB (47.6±12.2 MPa), SDWB (34.1±15.8 MPa), EDNB (31.1±8.3 MPa) and EDWB (15.5±13.6 MPa), revealing a statistically significant difference in the evaluated substrates and restorative materials. Conclusion: Bond strength of eroded substrate is inferior to the sound substrate and the restorative system containing S-PRG biomaterial influences negatively the results of bonding to sound/eroded dentin.

scholarly journals Microtensile Bond Strength of Polyacid-modified Composite Resin to Irradiated Primary Molars

2018 ◽  
Vol 19 (2) ◽  
pp. 189-195
Author(s):  
Yucel Yilmaz ◽  
Sultan Keles ◽  
Orhan Sezen
Keyword(s):  
Bond Strength ◽  
Primary Teeth ◽  
Composite Resin ◽  
Tooth Enamel ◽  
Primary Tooth ◽  
Primary Molars ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Tooth Dentin

ABSTRACT Aim This study evaluated the influence of various doses of radiotherapy on the microtensile bond strength (μTBS) of compomer resin to dentin and enamel in primary molars. Materials and methods Thirty-five intact primary molars were collected and divided into seven groups. Teeth were irradiated with doses from 10 to 60 Gy, except for the control group. Compomer restorations were performed, and enamel—compomer resin beams and dentin—compomer resin beams were tested at a crosshead speed of 1 mm/min. Results No statistically significant difference was found between the irradiated tooth enamel and the control group (F = 1.1468; p = 0.194). However, statistically significant differences were evident among the dentin groups (F = 11.050; p < 0.001). Conclusion Radiation may not cause a significant difference in the μTBS of compomer resin to primary tooth enamel, but appears to dose dependently decrease its bond strength to primary tooth dentin. Clinical significance Radiotherapy may affect the success rate of compomer fillings in primary teeth, especially in deeper cavities with exposed dentin. How to cite this article Keles S, Yilmaz Y, Sezen O. Microtensile Bond Strength of Polyacid-modified Composite Resin to Irradiated Primary Molars. J Contemp Dent Pract 2018;19(2):189-195.

scholarly journals Bond strength of universal adhesive applied to dry and wet dentin

2020 ◽  
Vol 19 ◽  
pp. e201662
Author(s):  
Maria Luísa de Alencar e Silva Leite ◽  
Caroline de Farias Charamba ◽  
Renally Bezerra Wanderley e Lima ◽  
Sônia Saeger Meireles ◽  
Rosângela Marques Duarte ◽  
...  
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Resin Composite ◽  
Adhesive System ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Bonding Quality ◽  
Etch And Rinse ◽  
Significant Difference ◽  
One Year

Aim: This study evaluated the influence of dentin wettability on the immediate and extended microtensile bond strength (mTBS) of a universal adhesive system used in the etch-and-rinse strategy. Methods: Twenty human third molars were selected and divided into four groups according to the adhesive system and dentin wettability. The mTBS values of each group were registered 24 h and one year after adhesive system application and resin composite block build-up (n=30). Data were analyzed by the t-test (p<0.05). Results: When both adhesive systems were compared, there was no statistically significant difference when they were applied following wet bonding (p>0.05). However, the dry bonding reduced μTBS values of the Adper Single Bond 2 adhesive (p<0.05). Regarding storage time, both groups presented similar μTBS values at 24 h and one year (p>0.05). Conclusions: Therefore, the Scotchbond Universal Adhesive can be applied to dry or wet dentin without compromising the etch-and-rinse bonding quality and the durability of the restorations.

scholarly journals The Role of Epigallocathecin-3-gallate as an Antioxidant After Dental Bleaching on Shear Bond Strength of Composite Resin Restoration

2021 ◽  
Vol 11 (1) ◽  
pp. 42
Author(s):  
Syarifah Nadhira Assyafira Al-Habsyi ◽  
Kun Ismiyatin ◽  
Galih Sampoerno
Keyword(s):  
Free Radicals ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Composite Resins ◽  
Dental Bleaching ◽  
Tooth Discoloration ◽  
Significant Difference ◽  
Composite Resin Restorations

Background: Tooth discoloration can be treated with dental bleaching using Hydrogen peroxide (H2O2). Dental bleaching may interfere with the shear bond strength of composite resins because the remaining free radicals can affect bonding polymerization. Epigallocatcehin-3-gallate (EGCG) as an antioxidant can neutralize the free radicals produced during bleaching process. Purpose: Analyze the role of EGCG antioxidants in increasing the shear bond strength of composite resin after bleaching.. Reviews: Of the seven journals included in this literature review, six journals reported significant difference, and one journal noted no significant difference in the shear bond strength of composite resin following the EGCG application. Conclusion: The use of EGCG can increase the shear bond strength value of post-bleaching composite resin restorations. 

scholarly journals Bond Strength Evaluation of Bulk- fill Composites to Dentin Under Different Surface Treatments

2020 ◽  
pp. 194-207
Author(s):  
Kazım Bas ◽  
Ebru Uslu Cender
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Surface Preparation ◽  
Acid Group ◽  
High Viscosity ◽  
Composite Resins ◽  
Control Group ◽  
Significant Difference

Purpose: The aim of this study is to compare the shear bond strength of three high-viscosity bulk-fill composite resins applied as single layers of 4mm thickness and of one microhybrid composite resin applied incrementally with a thickness of 2mm on dentin surfaces prepared with different surface preparation methods. Materials and Methods: A total of 132 caries-free human molars whose dentines had been exposed were used. Three groups, each containing 44 teeth, were formed. The acid group was etched with 32% phosphoric acid; laser group was etched with Er, Cr; YSGG laser and the control group was prepared with silicon carbid paper. Following the application of bonding agent, composite resin materials were applied on teeth using teflon moulds of 4x4mm. The samples were then subjected to shear bond strength tests. Two-way variance analysis and Tukey HSD multiple comparison test were applied on collected data. Results: There was a significant difference between surface treatment methods used regarding shear bond strength (P<0.001). The highest shear bond strength values were detected in the “Acid” group while the lowest shear bond strength values were detected in the “control” group. On the other hand, there was no statistically significant difference among composite resins (P>0.05). Conclusions: Laser etching of the dentin tissues is not as effective as acid etching. Bulk-fill composites had similar effects compared with conventional composite resins with regard to bonding strength. More in vitro studies supported with clinical data are required to investigate the performance of bulk-fill composites and laser.

scholarly journals Mechanical Degradation of Different Classes of Composite Resins Aged in Water, Air, and Oil

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Weber Adad Ricci ◽  
Priscila Alfano ◽  
Saulo Pamato ◽  
Carlos Alberto dos Santos Cruz ◽  
Jefferson Ricardo Pereira
Keyword(s):  
Flexural Strength ◽  
Storage Time ◽  
Composite Resin ◽  
Composite Resins ◽  
Mechanical Degradation ◽  
Hardness Testing ◽  
Significant Deterioration ◽  
Strength Tests ◽  
Group A ◽  
And Storage

A significant deterioration of the properties can drastically compromise the survival rate of restorative materials. The aim of this study was to assess flexural strength and hardness of three composite classes: hybrid composite resin (HCR), nanoparticulate composite resin (NCR), and silorane-based composite resin (SBCR). One hundred specimens were prepared for hardness testing by using a split metallic mold measuring 10 mm in diameter and 2 mm deep. Twenty specimens were prepared for each restorative material, randomly assigned for storage in air, distilled water, or mineral oil. After intervals of 24 hours, 30, 60, 90, and 120 days, hardness and flexural strength tests were initially compared in two levels: “storage medium” and “time” within each material group. A two-way analysis of variance was performed (p<0.05) on the variables “material” and “storage time” (p<0.05). The HCR showed to be stable with regard to the evaluation of flexural strength and hardness (p<0.05). A significant reduction occurs for the NCR in comparison to the other groups (p<0.05). The NCR presented the lowest values of hardness and flexural strength kept on water over time. The characteristics of material showed a strong influence on the decrease of the mechanical properties analyzed.

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