Title: 0250 - Evaluation of Bonding-strength of Intraoral Repair-kit With Current Ceramic Systems
Fatma Uslu, Cukurova University College of Dentistry
Janmyrat Achylow, Cukurova University Institute of Natural and Applied Sciences
Yurdanur Ucar (Presenter)
Cukurova University College of Dentistry
Objectives: The aim of this study was to evaluate the bond strength between intraoral repair kit and two different ceramic materials.
Methods: Specimens (N=12/group) with dimensions of 12×14 ×10 were prepared from feldspathic-ceramic (Cerec Blocks, Sirona) and nano-ceramic CAD/CAM blocks (Cerasmart, GC). Specimens were prepared using wet grinding with 800 and 1000 grit SiC paper. Intraoral repair kit (GC repair kit, GC), which consisted a universal bonding agent (G-Premio BOND) and a primer (CERAMIC PRIMER II) was applied on all blocks. Composite resin repair material was placed on the treated surfaces using a mold (8mm diameter and 3mm height) placed in the center. Shear bond strength and elastic modulus were measured using a universal testing machine at a crosshead speed of 1mm/min. Data were analyzed using independent samples t-test (α=0.05).
Results: Statistically significant difference was found for shear bond strength (P=0.0001) while no significant difference was observed for elastic modulus (P=0.150). The mean (±SD) shear bond strength values were 5.4±1.4 MPa and 3.2±1.0 MPa for feldspathic and nano-ceramic materials, respectively. The elastic modulus values were 35.2±14.8 GPa for feldspathic ceramic and 45.8±19.5 GPa for nano-ceramic.
Conclusions: Within the limitation of this study, the bond strength of repair material was higher when applied on feldspathic ceramic material. However, further studies are needed for a definite conclusion.
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONE