The effect of resin cement type and cleaning method on the shear bond strength of resin cements for recementing restorations

Abstract

PURPOSEThis laboratory study assessed the effect of different dentin cleaning procedures on shear bond strength of resin cements for recementing prosthesis.MATERIALS AND METHODS4 × 4 flat surface was prepared on the labial surface of 52 maxillary central incisors. Metal frames (4 × 4 × 1.5 mm) were cast with nickel-chromium alloy. All specimens were randomly divided into 2 groups to be cemented with either Panavia F2.0 (P) or RelyX Ultimate (U) cement. The initial shear bond strength was recorded by Universal Testing Machine at a crosshead speed of 0.5 mm/min. Debonded specimens were randomly allocated into 2 subgroups (n = 13) according to the dentin cleaning procedures for recementation. The residual cement on bonded dentin surfaces was eliminated with either pumice slurry (p) or tungsten carbide bur (c). The restorations were rebonded with the same cement and were subjected to shear test. Data failed the normality test (P < .05), thus were analyzed with Mann Whitney U-test, Wilcoxon signed rank test, and two-way ANOVA after logarithmic transformation (α = .05).RESULTSThe initial shear bond strength of group P was significantly higher than group U (P = .001). Pc and Uc groups presented higher bond strength after recementation compared to the initial bond strength. However, it was significant only in Pc group (P = .034).CONCLUSIONThe specimens recemented with Panavia F2.0 provided higher bond strength than RelyX Ultimate cement. Moreover, a tungsten carbide bur was a more efficient method in removing the residual resin cement and increased the bond strength of Panavia F2.0 cement after recementation.

The contribution of ceramic thickness and adhesive type on the de-bonding strength of dental ceramic veneers using Er,Cr:YSGG laser.

“…The luting systems suitable for indirect ceramic restorative techniques can be divided into two subgroups according to the bonding agent used before cementation: One group utilizes etch-and-rinse adhesive systems (total etch adhesive systems), and in the other self-etching primers are applied. 24 Self-adhesive cements were introduced as a new subgroup of resin cements.…”

“…8,9,12,15,17,20-23 Cement type has also been examined for re-cementing restorations. 24,25 The effects of ceramic thickness on early bond strength, color masking, fracture resistance and flexural strength have also already been evaluated. 26,30 To the best of our knowledge, the variation of the debonding strength of ceramic veneers on ceramic thickness de láser fueron superiores a las de todos los grupos con uso de láser.…”

The contribution of ceramic thickness and adhesive type on the de-bonding strength of dental ceramic veneers using Er,Cr:YSGG laser.

“…8,9,12,15,17,[20][21][22][23] Cement type has also been examined for re-cementing restorations. 24,25 The effects of ceramic thickness on early bond strength, color masking, fracture resistance and flexural strength have also already been evaluated. 26,30 To the best of our knowledge, the variation of the debonding strength of ceramic veneers on ceramic thickness de láser fueron superiores a las de todos los grupos con uso de láser.…”

Influence of resin removal treatments on the surface topography and strength of de-bonded lithium disilicate ceramic

“…To meet the aesthetic requirement of dental restoration, lithium disilicate ceramic (LDC) has gained popularity compared with traditional metal porcelain. 1,2 High acceptance of all ceramic crowns and partial coverage restorations over leucite-reinforced glass ceramics and metal porcelain are due to superior biocompatibility and translucency, and better thermal properties and enhanced flexural strength. 3,4 Apart from the unparalleled physical properties of LDC, for predictable treatment outcome the bonding of all ceramic materials to dentin remains the mainstay.…”

“…This adhered cement contaminates the ceramic surface, interferes with bonding, prevents infiltration of adhesive, and compromises etching quality. 1,11 Therefore, to recreate the desired surface topography of ceramic it is of utmost importance to remove the cement before the re-bonding procedure. 13,14 The conventional method to remove resin before re-cementing is treatment with HFA.…”