Effect of Substrate Age and Adhesive Composition on Dentin Bonding

Abstract

The bonding efficacy of current dentin adhesives is not affected by the dentin substrate age. Chemical bonding may play a role in the bonding effectiveness of specific adhesives. SUMMARYPurpose: To study the effect of dentin age and adhesive composition on the microtensile dentin bond strengths (lTBS) of five dentin adhesives.Materials and Methods: Sixty extracted caries-free human teeth were assigned to the appropriate age group: less than 21 years of age (,21), 21-40 years of age (21-40), and greater than 40 years of age (.40). For each age group, specimens were randomly divided into five dentin adhesives: (1) Adper Easy Bond (EB, 3M ESPE), a one-step self-etch adhesive; (2) Experimental Adper Easy Bond without the Vitrebond Co-polymer (CP) (EBnoCP, 3M ESPE); (3) Adper Single Bond Plus (SB, 3M ESPE), a two-step etch&rinse adhesive; (4) Experimental Adper Single Bond Plus without CP (SBnoCP, 3M ESPE); and (5) Adper Scotchbond Multi-Purpose (MP, 3M ESPE), a threestep etch&rinse adhesive, as the control group. Specimens were sectioned in X and Y directions and the resulting beams were tested to failure in tension mode at a crosshead speed of 1 mm/min. Statistical analysis was computed using t-test and two-way analysis of variance followed by Fisher least significant difference multiple comparison post hoc test at p , 0.05.Results: The highest mean lTBS values were obtained in the control group (MP) for all age groups. EB resulted in statistically similar mean lTBS compared to EBnoCP for all age groups: p = 0.538 for (,21); p = 0.974 for (21-40); and p = 0.909 for (.40). SB resulted in statistically higher mean lTBS than SBnoCP for all age groups [p,0.009 for (,21); p,0.028 for (21-40); and p,0.041 for (.40)]. MP, the control group, resulted in statistically lower mean lTBS when applied to the oldest age group

Two-year clinical performance of a two-step etch-and-rinse adhesive in non-carious cervical lesions

“…Therefore, different etching times-recommended versus extended-did not result in significant changes in dentin shear bond strength for XP Bond (27.9 and 30.5 MPa, respectively). In our study, retention did not seem to depend on whether chosen dentin etching time was 15 or 30 s. This is in corroboration with findings of in vitro studies [9,[42][43][44]. Our findings did not reveal any significant effect of doubling the dentin etching times recommended by the manufacturer when a two-step etch-and-rinse adhesive is used in NCCLs.…”

Dentin-composite bond strength measurement using the Brazilian disk test

“…However, they showed that SB only produced higher bond strength than EB with enamel; no differences in bond strength between the adhesive systems were found with dentin. On the other hand, Perdigao et al (29) found that MP (65.4 ± 9.5 MPa) resulted in significantly higher micro-tensile dentin bond strength than all the other adhesives tested, including SB and EB, although they did find EB (58.6 ± 6.1 MPa) to perform better than SB (44.7 ± 10.8 MPa). Yet other studies have found no significant differences between the total-etch and self-etch adhesives used in this study (30).…”

Influence of a hydrophobic resin coating on the immediate and 6-month dentin bonding of three universal adhesives

“…However, ABU does not have a polyalkenoic acid copolymer, such as VCP, in its composition. The relevance of VCP was recently studied using TBS [56]. The lack of the additional chemical bonding provided by VCP may be the reason why mean TBS where lower for ABU/SE than for SBU/SE.…”