IADR Abstract Archives

Effect of Different Luting Protocols on Bond-Strength of Fiber-Reinforced CAD/CAM-Blocks

Objectives: The aim was to evaluate the shear-bond strength (SBS) of experimental short fiber-reinforced CAD/CAM composite (SFRC-CAD) and commercial CAD/CAM composite (Cerasmart 270) to different luting resins before and after hydrothermal aging.
Methods: Discs (2mm thick) obtained from SFRC-CAD and Cerasmart 270 were mounted in acrylic cylindrical-blocks and polished flat using an automatic grinding machine with 180 grit silicon carbide papers to create a standard surface for bonding. Followed by sandblasting with aluminum-oxide and cleaning with air. Subsequently, primer (G-CEM One Enhancing Primer) with or without bond (G2 Bond) are applied on the treated surfaces. Two different luting resins were used: fiber-reinforced composite (everX Flow Bulk) and self-adhesive resin (G-CEM One). Total 16 groups determined on types of restorative material, bonding protocol, luting material and aging procedure (n=8/group). Half of the specimens (n=64) were subjected to the SBS test after 24-hour of storage in water at 37°C, while the other half underwent the SBS test after 16-hour of hydrothermal aging by boiling. SBS test was performed using a universal testing machine at a crosshead speed of 1.0 mm/min until failure occurred. The failure modes of the specimens were analyzed with visual inspection. Data were analyzed using ANOVA and Mann-Whitney U test for comparison.
Results: No statistically significant differences in SBS between everX Flow and G-CEM One groups (p>0.05) regardless of the bond application. The SBS of SFRC-CAD+everX Flow+bond (23.2±3.6 MPa) was notably higher (p<0.05) compared to Cerasmart 270+everX Flow+bond (18.9±2.4 MPa). However, there was no significant difference observed in the similar groups with using G-CEM One.
Conclusions: The SFRC-CAD composite demonstrated SBS values similar to those of Cerasmart 270. Additionally, everX Flow Bulk proved to be an effective luting resin, yielding results comparable to those of self-adhesive resin.

2024 Continental European and Scandinavian Divisions Meeting (Geneva, Switzerland)
Geneva, Switzerland
2024
0112
Dental Materials 4: Adhesion
  • Buyukates, Irem  ( Ankara University Graduate School of Health Sciences , Ankara , Turkey ;  Ankara University , Ankara , Turkey )
  • Garoushi, Sufyan  ( University of Turku , Turku , Finland ;  Turku Clinical Biomaterials Center-TCBC , Turku , Finland )
  • Vallittu, Pekka  ( University of Turku , Turku , Finland ;  Turku Clinical Biomaterials Center-TCBC , Turku , Finland )
  • Uctasli, Sadullah  ( Ankara University , Ankara , Turkey )
  • Lassila, Lippo  ( University of Turku , Turku , Finland ;  Turku Clinical Biomaterials Center-TCBC , Turku , Finland )
  • One of the authors (P.V.) declares that he is a consultant for Stick Tech oy, a member of GC Company, in the training, research, and development. The other authors confirm that they have no conflicts of interest.
    This study was supported by the research activity of BioCity Turku Biomaterials Research Program in Turku, Finland.
    Oral Session
    Oral 3 - Adhesion of Fiber-reinforced and CAD-CAM Restorative Materials
    Thursday, 09/12/2024 , 08:30AM - 10:00AM