Does Adhesive Layer Thickness and Tag Length Influence Short/Long-Term Bond Strength of Universal Adhesive Systems? An In-Vitro Study

(1) Background: This study investigated the effect of adhesive layer thickness and length resin tags on dentin bond strength five universal adhesives applied in self-etch mode. (2) Methods: One hundred fifty extracted human third molars were used. Five different mode surface. Half specimens subjected to an aging procedure for six months. A shear (SBS) test was performed results statistically analyzed with a t-test one-way ANOVA test. Scanning electron microscopy (SEM) executed measure tag depth. (3) Results: No statistical differences found between systems after 24 h storage period, regardless depth (p < 0.05). After 6 months water at 37 °C, Iperbond Max Scotchbond Universal preserved over time 0.05), whilst SBS Ultra, FuturaBond M+, Ibond decreased significantly period. relation observed or tags’ SBS. (4) Conclusions: Within limitation this study, stability depends their compositions and/or length.