Elsevier

Dental Abstracts

Volume 63, Issue 2, March–April 2018, Page 120
Dental Abstracts

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Sealing ability of cements on zirconia restorations

https://doi.org/10.1016/j.denabs.2017.11.041Get rights and content

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Background

The ability of a material to seal can be explained as its capacity to avoid the penetration of fluids, molecules, ions, and bacteria between a restoration and tooth material. The lifetime of a restoration can be affected by sealing ability. The evaluation of sealing ability in dental material is measured using micropercolation tests. Generally these are in vitro tests and use various standardized methods for dental preparations and thermocycling to age the obturation and assembling material

Methods

The 100 teeth were prepared, then divided into 10 groups based on the specific materials used for the zirconia restoration. The materials investigated were Fuji One (a glass-ionomer cement); Fuji Plus (glass-ionomer cement modified by adding resin); Variolink II and RelyX Ultimate (etch and rinse dual resins); Multilink, Panavia F2.0, and Bifix QM (self-etch dual resins); and RelyX Unicem 2, Maxcem Elite, and Bifix SE (self-adhesive dual resins).

Results

Percolation was seen on each section regardless of the assembling material used. The greatest lack of imperviousness was shown for Fuji I, Maxcem Elite, Gifix SE, and Multilink. Intermediate values were noted for Bifix QM, Panavia F2.0, Variolink II, and Fuji Plus. The weakest percolation percentage was noted for RelyX Unicem 2 and RelyX Ultimate. No difference in terms of percolation was noted between assembling on enamel and on dentin for the various materials used.

Conclusions

Observations indicate that the degree of imperviousness revealed in vitro will be even more important in vivo. Any agent that prevents percolation experimentally will be even tighter in place in the mouth. The best seal for a zirconium crown is achieved with a glass-ionomer cement modified by adding resin.

Clinical Significance

None of the agents was able to eliminate percolation on the various surfaces and achieve a high degree of imperviousness. There were differences between the groups of

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Cetik S, Solor-Bouvier T, Schittly E, et al: In vitro study of the sealing ability of cements for zirconia restorations. J Prosthodont 26:529-536, 2017

Reprints available from S Cetik, CP 604 808 Route de Lennik, 1070 Brussels, Belgium; e-mail: [email protected]

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