Effect of Simulated Dental Pulpal Pressure Using Fetal Bovine Serum for the Bonding Performance of Contemporary Adhesive to Dentin Li, Yitong Maeno, Masahiko Cifuentes Jiménez, Carolina Cecilia Komoto, Mei Liu, Yunqing Nara, Yoichiro Sano, Hidehiko Álvarez Lloret, Pedro Yamauti, Monica Tomokiyo, Atsushi Microtensile bond strength Simulated pulpal pressure Dentin This study evaluated the effect of simulated pulpal pressure (SPP) conditions and storage time on contemporary adhesive systems’ microtensile bond strength (μTBS) to dentin. Extracted human molars were prepared and randomly divided into four groups according to the adhesives: Clearfil Megabond 2 (CSE), Beautibond Xtreme Universal (BXU), G2-Bond (G2B), and Scotchbond Universal Plus (SBP). Each adhesive group was further divided following the SPP conditions: control with no simulation (SPP-CTR), SPP with distilled water (SPP-DTW), and SPP with fetal bovine serum (SPP-FBS). Resin composite build-ups were prepared, and teeth were stored in water (37 ◦C) for 24 h (24 h) and 3 months (3 m). Then, teeth were sectioned to obtain resin–dentin bonded beams and tested to determine the μTBS. Data were analyzed using three-way ANOVA, Tukey post hoc tests (=0.05), and Weibull failure analysis. Failure mode was observed using scanning electron microscopy. The μTBS response was affected by adhesive systems, simulated pulpal pressure conditions, and storage time. SPP-CTR groups presented a higher overall bond strength than SPP-DTW and SPP-FBS, which were not significantly different from each other. Only for SBP, the SPP-FBS group showed higher μTBS than the SPP-DTW group. The Weibull analysis showed that the bonding reliability and durability under SPP-DTW and SPP-FBS were inferior to SPP-CTR, and the 24 h bonding quality of adhesives to dentin was superior to that of 3 m. SPP drastically reduced the μTBS of all adhesives to dentin regardless of solution (distilled water or fetal bovine serum). Storage after 3 m also decreased μTBS despite the SPP condition. 2024-07-23T09:50:51Z 2024-07-23T09:50:51Z 2024-04-26 journal article Li, Y.; Maeno, M.; Cifuentes-Jimenez, C.C.; Komoto, M.; Liu, Y.; Nara, Y.; Sano, H.; Alvarez-Lloret, P.; Yamauti, M.; Tomokiyo, A. Effect of Simulated Dental Pulpal Pressure Using Fetal Bovine Serum for the Bonding Performance of Contemporary Adhesive to Dentin. Polymers 2024, 16, 1219. [https://doi.org/10.3390/polym16091219] https://hdl.handle.net/10481/93393 10.3390/polym16091219 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI