Shear Bond Strength for Immediate and Delayed Repair of Composite With Microhybrid and Nanohybrid Resins Using Different Bonding Agents

Kholief, Eman A.; Mahmoud, El Sayed M.; Chabrawy, Sonia M. El

doi:10.21608/adjalexu.2020.88446

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…For cleaning of the specimen's surface 37% phosphoric acid was applied for 15 seconds, rinsed and dried. 10 Then two step self-etch adhesive (FL-bond II, SHOFU INC., Japan) was applied in accordance with the manufacturer's instructions. The primer was applied using a micro-brush and left for ten seconds then, dried thoroughly till all solvent evaporated (until there was no movement observed).…”

Section: Asdj Ain Shams Dental Journalmentioning

confidence: 99%

“…9 Bond strength of repaired fiber reinforced composite is influenced by many factors as the type of surface treatment, the nature of bonding agent, the chemical composition of composite used and finally the time of intervention. 10 Different surface treatments either chemical or mechanical are recommended to improve adhesion at the interface. 11 After mechanical surface roughening, an intermediate layer of bonding agent alone or in conjunction with a silane agent can be applied.…”

Section: Introductionmentioning

confidence: 99%

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Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)

Ahmed,

Abdel Moniem,

Ghallab

2024

Ain Shams Dental Journal

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The aim of this study was to investigate the effect of time and surface treatments on shear bond strength of repaired fiber reinforced composite to nano-hybrid composite material. Materials and methods: Eighty specimens were prepared of ever-X Posterior (GC Europe). They were equally divided into two groups according to time of repair (after 24 hours and one month). Then, each group subdivided to five subgroups according to surface treatment (1-No surface treatment, 2-Diamond coated bur, two step self-etch adhesive, 3-Diamond coated bur, two step self-etch adhesive, silane, 4-Air abrasion, two step self-etch adhesive, 5-Air abrasion, two step selfetch adhesive, silane). A nano-hybrid composite was added as a material of repair in 2 mm thickness. All groups were thermocycled for 5000 cycles. The two-way ANOVA test was employed for statistical analysis of the data. Results: both the surface treatments and the time of repair had significant effect on SBS of repaired composite. The highest results were achieved in subgroup (Air abrasion and bonding agent) when repaired after one month. Conclusion: One month time relapse has no drastic effect on repair strength of FRC material. Air abrasion is considered a powerful mechanical surface treatment for achieving a highly significant repair strength of FRC material.

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Section: Asdj Ain Shams Dental Journalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)

Ahmed,

Abdel Moniem,

Ghallab

2024

Ain Shams Dental Journal

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“…Outcome Evaluation: Shear bond strength test: The shear bond strength was computed in megapascal (MPa) in accordance to the following equation: Shear bond strength= fracture load (Kg) / surface area of the disc (cm 2 ) where area of the disc = πr 2 . Then shear bond strength value Kg/cm 2 was converted to MPa by multiplying with 0.09807 (26). Mode of failure test:…”

Section: Marginal Adaptation Testmentioning

confidence: 99%

ASSESSMENT OF SHEAR BOND STRENGH AND MARGINAL ADAPTATION OF ACTIVA VERSUS Fuji II LC IN PRIMARY MOLARS IN VITRO

El-Noueam

Hanno²,

Dowidar³

et al. 2023

Alexandria Dental Journal

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BACKGROUND:Restoration of decayed primary molars remains a key concern in pediatric dentistry, in which proper retention, marginal seal and pulp protection are very essential in preventing secondary caries. This necessitated the development of materials such as ACTIVA BioACTIVE Restorative (ACTIVA). AIM OF THE STUDY:To assess the strength of the shear bond, bond mode of failure as well as marginal adaptation of ACTIVA in comparison to Fuji II LC when used in primary molars. MATERIALS AND METHODS:The present research is an in vitro experimental, comparative study where sixty primary extracted molars were randomly divided into two groups (A and B); each group consisted of 30 specimens. Group A was used for measuring shear bond strength and group B for measuring marginal adaptation. Group A and group B were subdivided each into three subgroups. The first subgroup received ACTIVA with no pretreatment (I). Second subgroup received ACTIVA with adhesive (II). Third subgroup received Fuji II LC (III). RESULTS: For shear bond strength, there is a significant difference between ACTIVA with adhesive (AII) and Fuji II LC (AIII) (p= 0.008). No significant differences were found between ACTIVA with no adhesive (AI) and ACTIVA with adhesive (AII) and between ACTIVA with no adhesive (AI) and Fuji II LC (AIII) {(p=0.824) and (p= 0.161) respectively}. For marginal adaptation, there is a significant difference between ACTIVA with no adhesive (BI) and ACTIVA with adhesive (BII) and between ACTIVA with adhesive (BII) and Fuji II LC (BIII) {(p=0.020) and (p<0.0001) respectively}. No significant difference was found between ACTIVA with no adhesive (BI) and Fuji II LC (BIII) (p= 0.345). CONCLUSION: ACTIVA with adhesive provided better results in comparison to ACTIVA without adhesive and Fuji II LC.

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Effect of Aging and Different Surface Treatments on Repair Bond Strength of Hybrid Resin Composites

Saleh,

Hashem,

Salem

2023

TODENTJ

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Background: With the trend for minimally invasive dentistry and the rapid evolution of composite resin materials, repair of defective composite resin restorations is a popular choice rather than replacement of the restoration. The durability of the bond between the old and repaired composite restoration is important for a successful outcome. Objective: To evaluate the immediate and delayed shear bond strength of two types of repaired hybrid resin composites using different chemical and mechanical surface treatments. Methods: Two types of hybrid resin composites, micro-hybrid resin composite and nanohybrid resin composite, were used to prepare 288 pre-polymerized resin composite specimens. After polymerization, repair was done after 24 hours and 6 months. Each hybrid resin composite group was divided into 3 groups according to surface treatment used to repair the substrate: group 1: no surface treatment, group 2: treated by medium abrasive stone, and group 3: treated by fine abrasive stone. Each group was further subdivided into 3 subgroups according to different agents used for repair: group 1: Silane, group 2: Universal adhesive, and group 3: Silane + adhesive. Shear bond strengths of the repaired specimens were measured using a Universal testing machine. Failure modes were evaluated under a stereomicroscope. Results: Different chemical and mechanical surface treatments had a significant effect on the shear bond strength values of all groups (p ≤ 0.05). The highest mean shear bond strength values were found in nano-hybrid composites immediately repaired by silane after treatment by a medium abrasive stone while the lowest mean shear bond strength values were found in micro-hybrid composites with delayed repair and no surface treatment. Conclusion: Diamond burs using silane with adhesive improved the repair bond strength of the tested hybrid composites. In composite repair, using abrasive mechanical pretreatment followed by adhesive conditioning is crucial for the success of the repair restoration.

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Shear Bond Strength for Immediate and Delayed Repair of Composite With Microhybrid and Nanohybrid Resins Using Different Bonding Agents

Cited by 3 publications

References 29 publications

Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)

Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)

ASSESSMENT OF SHEAR BOND STRENGH AND MARGINAL ADAPTATION OF ACTIVA VERSUS Fuji II LC IN PRIMARY MOLARS IN VITRO

Effect of Aging and Different Surface Treatments on Repair Bond Strength of Hybrid Resin Composites

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