J Adv Prosthodont.  2021 Jun;13(3):. 10.4047/jap.2021.13.3.180.

Micro-shear bond strengths of resin-matrix ceramics subjected to different surface conditioning strategies with or without coupling agent application

Affiliations
  • 1Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey

Abstract

Purpose
This study aimed to assess the influence of various micromechanical surface conditioning (MSC) strategies with or without coupling agent (silane) application on the micro-shear bond strength (µSBS) of resin- matrix ceramics (RMCs).
Materials and Methods
GC Cerasmart (GC), Lava Ultimate (LU), Vita Enamic (VE), Voco Grandio (VG), and Brilliant Crios (BC) were cut into 1.0-mmthick slices (n = 32 per RMC) and separated into four groups according to the MSC strategy applied: control-no conditioning (C), air-borne particle abrasion with aluminum oxide particles (APA), 2W- and 3W-Er,Cr:YSGG group coding is missing. The specimens in each group were further separated into silaneapplied and silane-free subgroups. Each specimen received two resin cement microtubules (n = 8 per subgroup). A shear force was applied to the adhesive interface through a universal test machine and µSBS values were measured. Data were statistically analyzed by using 3-way ANOVA and Tukey HSD test. Failure patterns were scrutinized under stereomicroscope.
Results
RMC material type, MSC strategy, and silanization influenced the µSBS values (P <.05). In comparison to the control group, µSBS values increased after all other MSC strategies (P <.05) while the differences among these strategies were insignificant (P >.05). For control and APA, there were insignificant differences between RMCs (P >.05). The silanization decreased µSBS values of RMCs except for VE. Considerable declines were observed in GC and BC (P <.05).
Conclusion
MSC strategies can enhance bond strength values at the RMC - cement interface. However, the choice of MSC strategy is dependent on RMC material type and each RMC can require a dedicated way of conditioning.

Keyword

Air-borne particle abrasion; Er,Cr:YSGG laser; Micro-shear bond strength; Resinmatrix ceramic; Silane
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