Abstract
BackgroundThe most appropriate luting agent for attaching the prefabricated Ti-based insert of hybrid abutments to its ceramic component has not yet been determined. This study was done aimed at examining the micro-shear bond strength (μSBS) of different cements to commercially pure titanium (Cp Ti).Material and MethodsA total of 100 milled cubes of Cp Ti was airborne-particle abraded using 250 μm aluminum oxide particles. Specimens were then divided into 5 groups (n=20) according to the type of resin cement used: (1) Panavia F.2, (2) Rely X U200, (3) Panavia SA LUTING Plus, (4) GC Fuji I, and (5) GC FujiCEM 2. After 24h storage, half of the samples were subjected to 5000 cycles of thermal aging. Next, the bonded samples were tested in the micro-shear mode. Data (MPa) were analyzed using a two-way ANOVA and the post hoc Tukey test (α=0.05). After debonding, each sample was examined for the failure mode classification.ResultsThe highest μSBS value in the study cements was obtained for Panavia F.2 cement (P<0.001) with no significant difference with Rely X U200 (P=0.07). The μSBS values of both GI-based cements were significantly lower than those of resin cements. Thermal aging decreased the μSBS values of all groups (P=0.003) significantly. The mainly occurred failure mode in all groups was the adhesive feature.ConclusionsResin cements demonstrated acceptable bonding to Cp Ti, yet Gl-based cements did not. From among the cements examined, Panavia F.2 can be considered as the best option for bonding to Ti. Key words:Bond strength, Glass ionomer, Hybride abutment, Resin cement, Titanium.
Highlights
Titanium (Ti) with some features like favorable bioco patibility, corrosive resistance, and sufficient mechanical strength is the preferred option for use in dental implant abutments [1]
The total mean ±SD μSBS values ranged from 7.91 ±3.71 MPa (GC FujiCEM 2) to 24.09 ±7.08 MPa (Panavia F.2)
According the results from Tukey analysis, the μSBS value of Panavia F.2 was significantly higher than other groups (P
Summary
Titanium (Ti) with some features like favorable bioco patibility, corrosive resistance, and sufficient mechanical strength is the preferred option for use in dental implant abutments [1]. Due to the lack of adhesion to dental tissues, conventional cements, such as zink phosphate and polycarboxylate were substituted by glass ionomer (Gl), resin modified glass ionomer (RMGl), and later by resin cements. Some features, such as high the ability to adhere to the tooth structure as well as metal and ceramic substrates, a wide range of esthetic shades, favorable mechanical properties, a high strength, an excellent retention property, and poor solubility in oral environments [9, 10] turn resin cements into the first option in the cementation of indirect restorations. From among the cements examined, Panavia F.2 can be considered as thebest option for bonding to Ti
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