Evaluating shear bond strength efficacy of seventh and eighth generation bonding agents (an in vitro study)
Keywords:Shear bond strength, Self etching, 7th and 8th generation bonding agent
Background and Objectives: The most important purpose of dental adhesives is to offer retention to composite fillings or composite cements. The most frequently applied laboratory parameter to evaluate the effectiveness of dentin bonding agents is shear bond strength. The aim of this study is to introduce the 8th generation of bonding to our country's dentists and investigating the manufacturer's claim in this research, and compare the shear bond strength of two types of systems.
Material and Methods: Thirty freshly extracted maxillary premolars were collected. After preparation, the samples were randomly divided into two groups of fifteen and each group was treated with a different bonding agent. In group A, 15 specimens were treated by Gluma Bond Universal (Kulzer, Hanau, Germany). In group B, 15 specimens were treated by LuxaBond Universal (DMG, Hamburg, Germany). O‐Light Curing Light unit (Woodpecker, Guilin, China) used for polymerization of both bonding systems. Composite (Beautifil Injectable X, Shofu Inc, Kyoto, Japan) cylinders were afterwards placed on the bonded surfaces using an elastic mold and were light‐cured. To measure the shear bond strength of the specimens a universal material tester was used. Descriptive Statistics and One Sample test was conducted for statistical analysis.
Results: The highest strength was seen in the 8th generation bonding agent (LuxaBond Universal (DMG, Hamburg, Germany). A highly significant difference (p < 0.000) was found between the seventh and eighth‐generation bonding groups.
Conclusion: The eighth‐generation bonding agent showed higher mean bond strength than the seventh generation bonding agent.
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