Comparative Analysis of the Shear Bond Strength of Flowable Self-Adhering Resin-Composites Adhesive to Dentin with a Conventional Adhesive

Abstract

This study aimed to measure and compare the shear bond strength (SBS) of a self-adhering flowable resin composite to dentin with a conventional flowable composite, and evaluate the various modes of failure. Thirty human premolar teeth (n = 30) were randomly allocated to two groups (Group I: Vertise™ Flow; Group II: Filtek Ultimate + Single Bond Universal) of 15 specimens each, and SBS was measured for specimens from each group by applying a shear load using a universal testing machine (UTM). Modes of failure were observed with an optical microscope. An independent-samples T-test was performed to test Levene’s assumption of homogeneity of variance across both groups, with the critical value set at 0.05. The results revealed, that the self-adhering flowable composite (Group I: Vertise™ Flow) resulted in a lower shear bond strength compared with the conventional adhesive system composite (Group II: Filtek Ultimate + Single Bond Universal). Moreover, group I predominantly exhibited non-cohesive failure, which reflects poor bonding to dentin. On the other hand, Group II showed mixed failure for most of the samples, which demonstrated strong adhesive bonding. Therefore, it could be concluded that the self-adhering flowable resin composite (Group I) results in lower SBS to dentin compared with a conventional adhesive system.

Influence of the Physical Inclusion of ZrO2/TiO2 Nanoparticles on Physical, Mechanical, and Morphological Characteristics of PMMA-Based Interim Restorative Material

“…Ceramic nanoparticles such as TiO 2 and ZrO 2 NPs are primarily used for this purpose [6,7]. TiO 2 NPs are white solids and considered technologically crucial due to their various properties [8,9] such as ease of synthesis, good tensile strength [10,11] adequate biocompatibility [12], antibacterial activity [13], and photocatalytic activity [11]. TiO 2 NPs are widely used as catalyst supports in biomedicine, water and air purification [14], pigments [14], cosmetics, solar cells [15], and tissue engineering [16][17][18].…”

Effect of Different Adhesive Strategies on the Microshear Bond Strength of Calcium-Silicate-Based Materials

“…The failure modes were examined under a stereomicroscope with magnification, and they were categorized as follows: adhesive (A; failure at the repair-substrate-bonded interfaces), cohesive (C; failure at least parts of the substrate or the repair composite), or mixed (M; A + C). 17…”

“…Therefore, they involve fewer application steps, reduced chair time, and a minimum risk of handling mistakes. 17 SARCs can be used for the restoration of small occlusal cavities or noncarious cervical lesions; alternatively, they can be used as a liner under definitive restorative material. 18 As a result of their favorable properties, SARCs can also be used as intermediate materials in VPT.…”

Rheological and Mechanical Properties of Resin-Based Materials Applied in Dental Restorations

“…In this way, the step of applying dental adhesive between the prepared dental surface and dental composite can be eliminated. Asiri et al [ 72 ] compared the shear bond strength of flowable composite with dentin and a conventional adhesive, and they found that the flowable composite has lower shear bond strength compared to a conventional adhesive-restored dentin. David et al [ 73 ] found that the adhesive strength of self-adhesive flowable composite to dentin and enamel is lower than that of conventional bonding with composite resins and self-etching adhesives.…”