Shear bond strength and microleakage of a new self-etch adhesive pit and fissure sealant

Abstract

This study aimed to evaluate the shear bond strength (SBS) and microleakage of a new self-etch adhesive-based fissure sealant (EG) on aprismatic enamel in comparison to conventional fissure sealing with 30 s acid etching (CG). The fissures were sealed according to the manufacturer's instructions. Each group was divided into 3 subgroups: 1-day water storage, 3-month water storage, and 5,000× thermocycling. After measuring SBS using the Ultradent method, failure mode was analyzed. In additional 16 teeth, microleakage was tested using dye penetration method. Pairwise comparisons were analyzed using Mann-Whitney U-Test. Multiple linear regression was performed to assess the factors influencing on SBS. EG had significantly lower mean SBS (4.1 MPa±2.1) than the CG (17.6 MPa±6.4). CG (1.1%) performed significantly better than the EG (12.8%) in microleakage analysis. The tested EG yielded significantly inferior results and its clinical use should be decided after weighing its pros and cons.

Assessment of shear bond strength and microleakage of fissure sealant following enamel deproteinization: An in vitro study

“…In contrast, in the present study, the application of sodium hypochlorite and Papacarie ® as a deproteinization agent prior to etching did not decrease the microleakage of the fissure sealant. Although some previous studies have reported that fissure sealants with higher shear bond strength demonstrate less microleakage (25,26), the results of the present study demonstrated that both deproteinization groups possessed significantly higher shear bond strength values than the control group did, yet no statistically significant difference was determined between the groups in terms of microleakage. According to the findings of the current study, in terms of microleakage, no statistically significant difference was found between the deproteinization groups and the control group, which confirms the second null hypothesis.…”

Assessment of Bonding Effectiveness of Adhesive Materials to Tooth Structure using Bond Strength Test Methods: A Review of Literature

“…The thermal cycles in the oral environment can lead to deteriorating stresses between the tooth substrate and restorative material by producing expansion and contraction stresses [ 73 ]. Many studies found that thermocycling reduced the bond strength to enamel and dentin depending on the type of adhesive [ 73 , 74 ]. Burke et al ., [ 75 ] reviewed the methods used in bond testing in 102 published investigations and found that 82% of the papers did not provide information on whether the specimens had undergone thermal cycling.…”

“…It is recommended to perform thermocycling at a frequency of 500 cycles by ISO/TS specification for reliable results [ 76 ]. If it exceeds this frequency, studies have shown decrease of bond strength [ 74 , 77 ].…”

Sealing Carious Fissures with Resin Infiltrant in Association with a Flowable Composite Reduces Immediate Microleakage?

“…In the clinical scenario, long-term degradation of the interface is most probably accounted for sealant failure and it could be expected that ageing of specimens would result in increased microleakage scores. However, an immediate in vitro evaluation, such as microleakage may be considered as a good screening or a reference towards which different materials and/or combinations of materials should be tested and/or clinically applied [22].…”