PMID- 34060303 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 3 VI - 23 PST - ppublish DP - 2021 PG - 233-242 LA - en TI - Effects of Different Tooth Conditioners on the Bonding 
of Universal Self-etching Adhesive to Enamel LID - 10.3290/j.jad.b1409311 [doi] FAU - Baba, Yuta AU - Baba Y FAU - Sato, Takaaki AU - Sato T FAU - Takagaki, Tomohiro AU - Takagaki T FAU - Vicheva, Martina AU - Vicheva M FAU - Sato, Ayaka AU - Sato A FAU - Ikeda, Masaomi AU - Ikeda M FAU - Nikaido, Toru AU - Nikaido T FAU - Tagami, Junji AU - Tagami J CN - OT - enamel OT - selective-etching OT - acid-base resistance zone OT - microshear bond strength test AB - Purpose: To investigate the effects of several etching products prior to the application of a one-step self-etch adhesive (1-SEA) or two-step self-etch adhesive (2-SEA) on enamel by microshear bond strength (µSBS) testing and observation of the adhesive-enamel interface. Materials and Methods: Ground human enamel surfaces were randomly assigned to one of eight groups according to the combination of surface treatments (either no conditioner [NC], ME [Multi Etchant], EC [Enamel Conditioner], or KE [K-etchant Gel]) and adhesive (ADU [Adhese Universal] or SE2 [Clearfil SE Bond 2]). All groups were further divided into two subgroups: 0 or 10,000 thermal cycles (TC). Then, the µSBS test was performed. The adhesive-enamel interface after acid-base challenge and the surface structure after conditioner application were also observed. Results: With 10,000 TCs, there was no statistically significant difference between ME-ADU and NC-ADU. On the other hand, the µSBS of EC-ADU or KE-ADU was significantly higher than that of NC-ADU, while that of ME-SE2 was significantly lower than NC-SE2. There was no significant difference between EC-SE2, NC-SE2, and KE-SE2. Formation of an acid-base resistance zone (ABRZ) was confirmed in all groups. However, funnel-shaped erosion, which indicates interfacial defects, was observed in the NC-ADU, ME-ADU, and ME-SE2 groups. Conclusion: For enamel bonding, application of EC or KE prior to ADU increased the bond strength and created a stable adhesive-enamel interface. On the other hand, SE2 also had stable shear bond strength and interface without the use of conditioners. However, ME decreased the bonding performance of SE2. AID - 1409311