Title: 0252 - Comparison of Shear Bond Strength of Four Different Cement
Sifa Atabek (Presenter)
Near East University
A. Nehir Ozden, Near East University
Objectives: Fixed partial dentures consist of very critical procedures; the last step among them, a folding agent choice for permanent cementation represents a particularly difficult desicion due to the large number of cements present. The purpose of this research is to compare shear bond strenght of a glass ionomer-modified bioceramic luting agent with resin cements which have developed in recent years.
Methods: Sixty human extracted molar teeth to be used in this study were kept in distilled water after being cleaned. The drawn teeth were then placed centrally in cylinders (20x25 mm) obtained from cold acrylic. The dentin surfaces were polished with 220, 400, and 600 grit SiC papers, respectively, after the removed tooth surfaces were trimmed with the bur.
For four different cement groups, 15 teeth were selected randomly from the 60 teeth. Three different resin cements (Relyx ultimate clicker (R), Variolink N (V), Panavia V5 (P)) and a glass ionomer-modified bioceramic luting agent (Ceramir Crown & Bridge QuikCap (C)) were applied to the dentin surfaces and cured according to the manufacturer's recommendations. The test set up used were the Ultradent shear bond strength method with 2.8 Æ mm molds. After the resin groups were immersed in the humidified environment for 24 hours at 37°C and the glass ionomer-modified bioceramic group were stored in sterile phosphate buffer at 37°C for 24 hours, the shear bond strengths(SBS) were measured with a universal test machine. Failure modes (adhesive, cohesive or mixed) were evaluated by means of a magnifying glass (LUXO).
Results: The results were evaluated statistically with Kruskal-Wallis test and multiple comparisons between pairwise groups were performed with the Dunn’s post hoc test (p< 0.05). Shear bond strength levels for P, R, V and C groups are: 18.17±8.79, 13.30±8.82, 9.13±7.95 and 6.03±3.23 Mpa respectively. The failure modes were mostly in mixed behaviour.
Conclusions: Although the resin cements have higher average shear bond strength, the values recorded for the glass ionomer-modified bioceramic cement was not significantly different.
This abstract is based on research that was funded entirely or partially by an outside source:
Near East University BAP unit , SAG-2017-01-015
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