Shear bond strength of luting agents to fixed prosthodontic restorative core materials

• Published in: Australian dental journal Vol. 54; no. 4; pp. 334 - 340
• Main Authors: Capa, N, Özkurt, Z, Canpolat, C, Kazazoglu, E
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.12.2009
• Subjects: Dental Alloys; Dental Bonding; Dental Porcelain; Dental Stress Analysis; Dentistry; Glass Ionomer Cements; Materials Testing; Noble alloy; non‐noble alloy; pressable porcelain; Resin Cements; resin‐modified glass ionomer cement; self‐adhesive dual‐cured resin cement; Shear Strength; Surface Properties; Titanium; zirconia; Zirconium
• ISSN: 0045-0421; 1834-7819
• DOI: 10.1111/j.1834-7819.2009.01159.x

Background:  Bonding properties of luting cements are important for retention of restorative core materials. The aim of this study was to compare the bonding performance of a resin‐modified glass ionomer cement and a self‐adhesive resin cement to various fixed prosthodontic core materials. Methods:  Cylindrical specimens with a thickness of 2 mm and a diameter of 5 mm were fabricated from Au‐Pd‐Ag, Co‐Cr, Ni‐Cr‐Mo, Ni‐Cr‐Fe alloys, titanium, zirconia and Empress II (n = 20). Each group was divided into two subgroups to be luted with two different luting agents. Composite resin blocks were cemented onto specimens with RelyXUnicem and FujiCem. A shear bond strength machine with 50 kg load cell and 0.50 mm/min crosshead speed was used. Kruskal Wallis test, Dunn’s Multiple Range test and Mann‐Whitney‐U test were used for statistical analysis. The results were evaluated in a confidence interval of p < 0.05. Results:  The highest bond strength was obtained between Ni‐Cr‐Fe‐RelyXUnicem (8.22 ± 2.15 MPa) and the lowest was between Empress II‐FujiCem (1.48 ± 0.9 MPa). In FujiCem groups, Co‐Cr and Ni‐Cr‐Fe showed significantly higher bond strength than Au‐Pd‐Ag and Empress II. In RelyX Unicem groups, Ni‐Cr‐Fe showed higher bond strength than Empress II. Conclusions:  The types of luting agents and restorative core materials may have a significant influence on bond strength.