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Eur J Oral Sci. 2017 Feb;125(1):81-87. doi: 10.1111/eos.12316. Epub 2016 Nov 16.

Promotion of resin bonding to dental zirconia ceramic using plasma deposition of tetramethylsilane and benzene.

Author information

1
Department of Dental Biomaterials Science, Seoul National University School of Dentistry & Dental Research Institute, Seoul, Korea.
2
Department of Conservative Dentistry, Institute of Oral Health Science, Ajou University School of Medicine, Suwon, Korea.
3
Department of Conservative Dentistry, Seoul National University School of Dentistry & Dental Research Institute, Seoul, Korea.
4
Department of Materials Science & Engineering, Seoul National University, Seoul, Korea.

Abstract

The aim of this study was to investigate the effects of plasma-enhanced deposition of an organosilane and benzene on resin bonding to a dental zirconia ceramic. A total of 70 zirconia specimens, which were polished before sintering, were randomly divided into five groups according to surface treatments before applying a dental adhesive (each group, n = 14): group 1, no previous treatment (control); group 2, plasma deposition with tetramethylsilane (TMS); group 3, plasma deposition with benzene; group 4, sequential plasma deposition with TMS and benzene; and group 5, a zirconia primer (Z-Prime Plus). A dental adhesive (Scotchbond Multi-Purpose adhesive) was applied to the surface-treated zirconia, and resin composite rods were built in to enable shear bond-strength testing. The sequential deposition of TMS and benzene showed the highest bond strength [22.7 ± 3.7 MPa (mean ± SD)], approximately twice that of Z-Prime Plus (10.3 ± 3.2 MPa). The plasma deposition with either TMS or benzene also significantly improved bond-strength values compared with the negative-control group, and their effects were not statistically different from that of Z-Prime Plus. Following plasma deposition with TMS, the introduction of silicon-oxygen-zirconium (Si-O-Zr) bonds on the zirconia surface was confirmed via X-ray photoelectron spectroscopy (XPS) analysis. Transmission electron microscopy and energy dispersive X-ray spectroscopy showed that a silica-like layer and a polymerizable carbon-rich layer were formed through sequential deposition with TMS and benzene.

KEYWORDS:

adhesion; non-thermal plasma; polymer deposition; siloxane bond

PMID:
27859654
DOI:
10.1111/eos.12316
[Indexed for MEDLINE]

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