Shear bond strength of luting cements to fixed superstructure metal surfaces under various seating forces

Abstract

PURPOSEIn this study, the shear bond strengths (SBS) of luting cements to fixed superstructure metal surfaces under various seating forces were investigated.MATERIALS AND METHODSSeven different cements [Polycarboxylate (PCC), Glass-Ionomer (GIC), Zinc phospahate (ZPC), Self-adhesive resin (RXU), Resin (C&B), and Temporary cements ((RXT) and (TCS))] were bonded to a total number of 224 square blocks (5×5×3 mm) made of one pure metal [Titanium (CP Ti) and two metal alloys [Gold-Platinum (Au-Pt) and Cobalt-Chrome (Co-Cr)] under 10 N and 50 N seating forces. SBS values were determined and data were analyzed with 3-way ANOVA. Pairwise comparisons and interactions among groups were analyzed with Tukey's simultaneous confidence intervals.RESULTSOverall mean scores indicated that Co-Cr showed the highest SBS values (1.96±0.4) (P<.00), while Au-Pt showed the lowest among all metals tested (1.57±0.4) (P<.00). Except for PCC/CP Ti, RXU/CP Ti, and GIC/Au-Pt factor level combinations (P<.00), the cements tested under 10 N seating force showed no significantly higher SBS values when compared to the values of those tested under 50 N seating force (P>.05). The PCC cement showed the highest mean SBS score (3.59±0.07) among all cements tested (P<.00), while the resin-based temporary luting cement RXT showed the lowest (0.39±0.07) (P<.00).CONCLUSIONPolycarboxylate cement provides reliable bonding performance to metal surfaces. Resin-based temporary luting cements can be used when retrievability is needed. GIC is not suitable for permanent cementation of fixed dental prostheses consisting of CP Ti or Au-Pt substructures.

Effect of Cement Layer Thickness on the Immediate and Long-Term Bond Strength and Residual Stress between Lithium Disilicate Glass-Ceramic and Human Dentin

“…According to the literature, during the cementation procedure, the resinous cement should completely fill the space between the restoration and the tooth with no marginal discrepancy [ 29 ]. However, the cement film thickness can be strongly influenced by the type of luting cement and the seating force applied [ 29 ].…”

“…According to the literature, during the cementation procedure, the resinous cement should completely fill the space between the restoration and the tooth with no marginal discrepancy [ 29 ]. However, the cement film thickness can be strongly influenced by the type of luting cement and the seating force applied [ 29 ]. The present study applied different seating forces to obtain different values of cement thicknesses; however, it was necessary to verify each of the samples in the microscopy and to calculate the cement layer thickness with the analysis software before affirming the average cement layer per group.…”

In Vitro Bonding Performance of Modern Self-Adhesive Resin Cements and Conventional Resin-Modified Glass Ionomer Cements to Prosthetic Substrates

“…Conventional GIC cements are characterised by a week tensile strength, fracture resistance and by the absence of chemical bond with noble metal in alloys [81,82]. Conversely, the mechanical properties of resin-modified glass ionomer cements (RMGIC) are generally greater than those of a conventional GIC; the compressive strength of the RMGIC at 24 h after setting is lower than that observed in conventional resin-free GIC [83]. However, it has been supported that the polyalkenoic acids present in glass ionomer cements can react and create a chemical bond both with non-noble metals and with the passive oxide layer that usually forms on the surface of metal alloys [84,85].…”

Effect of different surface treatments on the shear bond strength of luting cements used with implant-supported prosthesis: Anin vitrostudy

“…Bonding surfaces of the titanium specimens were polished with 600 SiC paper using an automatic polishing device under water. 23,24 Specimens were then ultrasonically cleaned (Transsonic T700, Elma, Singen, Germany) for 10 minutes and dried by air. Specimens were separated equally into 3 groups considering applied surface pre-treatment (n = 40), as follows:…”

“…25 After allowing the cement to set for 10 minutes, specimens were carefully dislodged from the acrylic molds and stored in a covered box containing distilled water until bond strength testing to prevent any stress to the cement material. 23 A universal testing machine (Bisco Bond Tester, Bisco, Schamburg, IL, USA) was used to test shear bond strength. Specimens were placed in the specimen holder with the cement sample parallel to the loading piston, and a load with a cross-head speed of 0.5 mm/min was performed.…”