Durability of Adhesion between Feldspathic Ceramic and Resin Cements: Effect of Adhesive Resin, Polymerization Mode of Resin Cement, and Aging

Abstract

Application of a low-pH adhesive resin onto a hydrofluoric acid etched and silanized feldspathic ceramic surface in combination with chemically polymerized resin cement did not deliver favorable results. The use of adhesive resin with high pH could be clinically advised for the photo-, dual-, and chemically polymerized resin cements tested.

Effect of aging type and aged unit on the repair strength of resin composite to feldspathic porcelain in testing microtensile bond strength

“…In addition to these factors, bonding test type (tensile, microtensile, shear, microshear) [20] and tests design (i.e. hourglass, 9 dumbbell or stick shaped specimen for the µTBS test) [21] all affect the bond strength results.…”

“…Improvements on the adhesion have been the focus of many studies [3][4][5][6][7][8][9] where two clinical scenarios were of interest, namely cementation of the restorations [5,7,9] and repair of ceramic defects using resin composites [4,8]. Essentially, in both situations resinous materials are used that are composed of organic polymer matrix and reinforced inorganic filler particles [10].…”

“…On the other hand, thermocycling is used in some studies [7,9] aiming to induce contraction/expansion stresses at the interface that results from the thermal expansion coefficient of the materials [12]. This can induce crack propagation along the interface and consequently debond the materials.…”

“…This can induce crack propagation along the interface and consequently debond the materials. Different thermocycling profiles have been reported, varying from 3.000 [7], 5.000 [14], 12.000 [9] to high numbers such as 40.000 cycles [15]. 4 The effectiveness of the aging protocol can be related to the type of interface and type of test used for the individual study.…”

“…The aging process prior to the µTBS test can be performed either by exposing the bonded block (block aging) [5,7] or the sticks obtained from the bonded block (stick aging) to the aging media [9,18,19]. However, to date the literature lacks studies comparing the effectiveness of the aging methods in these two experimental situations.…”