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

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 adnerence of composite restorative material to dental instruments.

Source: European Journal of Oral Sciences - September 18, 2017 Category: Dentistry Authors: Jarmo Lepp äniemi, Sasha Hoshian, Kimmo Suomalainen, Toni Luoto, Ville Jokinen, Jari Koskinen Tags: Original Article Source Type: research