Non-stick properties of thin-film coatings on dental-restorative instruments

Jarmo Leppäniemi, Sasha Hoshian, Kimmo Suomalainen, Toni Luoto, Ville Jokinen, Jari Koskinen

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Abstract

The non-stick properties of thin-film coatings on dental-restorative instruments were investigated by static contact-angle measurement using dental filler resin as well as by scanning electron microscopy of the amount of sticking dental restorative material. Furthermore, using a customized dipping measurement set-up, non-stick properties were evaluated by measuring force-by-time when the instrument was pulled out of restorative material. Minor improvements in non-stick properties were obtained with commercial diamond-like carbon and commercial polytetrafluoroethylene-based coatings. Major improvements were obtained with an in-house fabricated superhydrophobic coating prepared by a multistep process consisting of surface microstructuring by etching in hydrogen fluoride (HF): hydrogen peroxide (H2O2)(1:1; vol/vol), atomic layer deposition of a 7 nm coating of aluminium oxide and titanium oxide, and a self-assembled monolayer of fluorinated organosilicon. Superhydrophobic coatings provide a possible future solution to prevent unwanted adherence of composite restorative material to dental instruments
Original languageEnglish
Article numberEOS12372
Pages (from-to)495-503
Number of pages9
JournalEUROPEAN JOURNAL OF ORAL SCIENCES
Volume125
DOIs
Publication statusPublished - 13 Nov 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • adhesion
  • restorative composite material
  • superhydrophobic

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