IADR Abstract Archives

Effect of IDS Using Universal Adhesives on Monolithic Zirconia's Adhesion

Objectives: This study evaluated the effect of immediate dentin sealing (IDS) treatment using different universal adhesive systems on microtensile bond strength (μTBS) of pretreated monolithic zirconia-based CAD/CAM block to dentin.
Methods: Mid-coronal dentin surfaces were obtained from 32 intact human molars and randomly allocated into 8 groups according to types ofuniversal adhesives used for IDS treatment (Single Bond Universal/SBU, Clearfil Quick Bond/CUQ, Optibond Universal/OBU) and zirconia surface pretreatment methods (tribochemical silica coating with 30 µm CoJet particles/TSC and sandblasting with 50 μm Al2O3/SB): 1)Group TSC, 2)Group TSC+SBU, 3)Group TSC+CUQ, 4)Group TSC+OBU, 5)Group SB, 6)Group SB+SBU, 7)Group SB+CUQ, 8)Group SB+OBU. A monolithic zirconia-based CAD/CAM blocks(Lava Plus, 3M ESPE) were luted to the dentin surfaces with a self-adhesive dual-cure resin cement(Rely X U200,3M ESPE). They were subjected to 10.000 thermocycles and then sectioned. Zirconia-dentin bars(2x2x8 mm) were subjected to μTBS test with a universal test machine(Microtensile Tester, Bisco)(crosshead speed:0.5mm/min)(n=16). Failure types were analyzed under stereomicroscope. Surface roughness of pretreated monolithic zirconia were measured with contact profilometer. Surface morphology of zirconia and zirconia-dentin interfaces were analyzed under SEM(Evo LS10 Zeis). Semi-quantitative chemical microanalysis were performed with EDS. Two-way ANOVA and Bonferroni tests were used for statistical analyses(p<0.05).
Results: Regarding IDS treatments, Group TSC+OBU showed statistically higher μTBS than Group TSC(p<0.05). Group TSC+OBU and Group SB+OBU showed statistically higher μTBS than Group TSC+CUQ and Group SB+CUQ, respectively(p<0.05). No significant differences in μTBS and surface roughness were detected according to surface pretreatments(p>0.05). Rougher surface morphology and higher Si content were observed after tribochemical silica coating pretreatment. A thick, intact hybrid layer with long resin tags were observed for Group TSC+OBU and Group SB+OBU. The predominant failure mode was mixed for most groups.
Conclusions: After both pretreatment methods, IDS with Optibond Universal resulted in higher bond strength than the ones with Clearfil Universal Bond Quick.

2023 Continental European and Scandinavian Divisions Meetings (Rhodes, Greece)
Rhodes, Greece
2023
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Dental Materials 4: Adhesion
  • FazlioĞlu, Leyla  ( Bezmialem Vakif University , Istanbul , Turkey )
  • Oglakci, Burcu  ( Bezmialem Vakif University , Istanbul , Turkey )
  • Tağtekin, Dilek  ( Marmara University , Istanbul , Turkey )
  • None
    20210814
    Oral Session
    Oral Session 1 - Dental Materials - Adhesion
    Thursday, 09/21/2023 , 08:30AM - 10:00AM