Abstract
Objective: To assess the tensile bond strength of prefabricated metal posts cemented with different luting agents. Material and Methods: Fifty single-rooted endodontically treated human teeth had their crowns cut, mounted into acrylic-resin blocks and then an 8mm depth post space were prepared. Prefabricated cylindrical metal posts were cemented using different luting agents: a zinc phosphate cement (SS White), a conventional glass ionomer cement (Vidrion C), two resin-modified glass ionomer cements (Vitremer and RelyX Luting 2) and a resin cement (RelyX ARC). Samples were stored in distilled water for seven days and then submitted to a tensile bond strength test until complete dislocation of the post. One-way analysis of variance and Tukey test for pairwise multiple comparisons were used to evaluate differences between luting agents . Results: Tensile bond strength was 563.88±203.41 N for zinc phosphate cement, 336.86 ± 137.64 N for Vidrion C, 515.24 ± 239.48 N for Vitremer, 828.47±433.99 N for RelyX Luting 2 and 1262.51 ± 356.29 for RelyX ARC. The Relyx ARC presented the highest tensile bond strength regard the luting agent tested (p< 0.05) . Conclusion: RelyX ARC presented the higher tensile bond strength compared to the other luting agents evaluated.
Highlights
Restorative dentistry currently provides various routine methods for rehabilitation of endodontic treated teeth with compromised coronary structure [1]
Posts are designed to retain the build-up material that substitutes the lost coronal dental structure [4,5]. Basic concepts, such as the proper length and shape of a post suitable for the root, continue to be the best clinical parameters employed in post and core technique, independent of the post type or material of which they are made [5,6]
Prefabricated posts are being frequently used, in regard of metal cast post and core, and different luting agents are available for this post and core techniques
Summary
Restorative dentistry currently provides various routine methods for rehabilitation of endodontic treated teeth with compromised coronary structure [1]. In order to rehabilitate these treated roots and to provide coronary reconstruction, an intracanal post could be necessary to support the crown restoration [2,3,4,5]. These teeth are more fragile and, there is a greater risk of root fractures due to dental function [2,3,4,5]. They could be cemented using zinc phosphate cement [7], being a cheap treatment option
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