J Adv Prosthodont.  2018 Oct;10(5):340-346. 10.4047/jap.2018.10.5.340.

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

• Ozer F
• Pak-Tunc E
• Dagli NE
• Ramachandran D
• Sen D
• Blatz MB

• KMID: 2422869
• DOI: http://doi.org/10.4047/jap.2018.10.5.340

Abstract

PURPOSE
In this study, the shear bond strengths (SBS) of luting cements to fixed superstructure metal surfaces under various seating forces were investigated.
MATERIALS AND METHODS
Seven 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.
RESULTS
Overall 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).
CONCLUSION
Polycarboxylate 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.

Keyword

Metal alloy; Cement; Bond strength; Seating force

MeSH Terms

Alloys
Cementation
Dental Prosthesis
Metals
Polycarboxylate Cement
Zinc
Alloys
Metals
Polycarboxylate Cement
Zinc

Figure

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  Fig. 1 Test set-up of the study.

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