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Non‐stick properties of thin‐film coatings on dental‐restorative instruments
Author(s) -
Leppäniemi Jarmo,
Hoshian Sasha,
Suomalainen Kimmo,
Luoto Toni,
Jokinen Ville,
Koskinen Jari
Publication year - 2017
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/eos.12372
Subject(s) - materials science , composite material , contact angle , coating , polytetrafluoroethylene , organosilicon , scanning electron microscope , layer (electronics) , polymer chemistry
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 (H 2 O 2 ) (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 adnerence of composite restorative material to dental instruments.