Improved brushing durability of titanium dioxide coating on polymethyl methacrylate substrate by prior treatment with acryloxypropyl trimethoxysilane-based agent for denture application

Abstract

The purpose of this study was to determine whether the brushing durability of a titanium dioxide coating on a polymethyl methacrylate (PMMA) substrate was improved by prior treatment with an acryloxypropyl trimethoxysilane-based agent. Titanium dioxide coatings were obtained by spray-coating substrates with or without prior treatment. Structure was investigated using IR, SEM, and an EPMA. Effect on durability against brushing was determined with a brush-wear test machine utilizing a commercial denture brush.A thin layer comprised of siloxane and TiO2 was formed on a PMMA substrate by prior treatment with an acryloxypropyl trimethoxysilane-based agent and spray-coating of TiO2. Prior treatment demonstrated improved stability against brushing, whereas the titanium coating was removed after less than 1×10 5 brushing cycles without prior treatment. This suggests that prior treatment with an acryloxypropyl trimethoxysilane-based agent would confer improved durability against brushing-induced stress on a TiO2 coating in its application to dentures.

Color and gloss evaluation of titanium dioxide coating for acrylic resin denture base

“…per day for one year [8]. Based on this finding, we conclude showed that this titanium dioxide coating has sufficient durability under conditions associated with the long term use of dentures.…”

“…The titanium dioxide coating on acrylic resin denture bases improves wettability, reduces adhesion of food bolus [6], and suppresses adhesion of bacteria and fungi [7]. We have reported that the use of a primer agent, which primarily consists of acryloxypropyl methoxysilane, for pre-treatment of the titanium dioxide coating affords durability of the titanium dioxide coating against brushing [8]. Moreover, the biocompatibility of a primer agent and TiO 2 coating agent has been already demonstrated [9].…”

Hydrophilic nano-silica coating agents with platinum and diamond nanoparticles for denture base materials

“…We followed the same protocol of the previous study, which assessed the durability of a titanium oxide (TiO 2) coating on PMMA 22) . The loading force of 2.94 N and gliding speed of 150 cycles per 60 s were determined by averaging the loading force and gliding speeds applied by five healthy subjects.…”

“…The brush was fixed with a clasp and positioned vertically to the surface of the specimens. The brush was applied at a force of 2.94 N. The gliding speed of the device was set to 150 cycles per 60 s 22) . After 600 cycles of the brush-wear test, the contact angles of the worn specimens were measured following the same protocol described above.…”

Inhibition of denture plaque by TiO 2 coating on denture base resins in the mouth

“…2,3 The high photocatalytic and superhydrophilic effects of titanium dioxide (TiO 2 ) have been reported, and when applied to dentures, they can be cleaned simply by rinsing in water. [4][5][6][7] Two methods have been proposed for the application of TiO 2 to the denture base. One method is to mix TiO 2 with resin.…”