Self-cleaning Ability of a Photocatalyst-containing Denture Base Material

Abstract

This study examined the ability of a photocatalyst mixed in a denture base resin to decompose organic substances which adhered to the denture base resin surface. The photocatalyst was mixed with denture base resin at concentrations of 0, 5, 10, and 15％ (w/w). Decomposition test, bending test, and surface roughness measurement were performed at 1, 7, 30, 90, and 180 days after polymerization. Decomposition ability was evaluated based on the residual amount of methylene blue (MB) dissolved in ethanol after UV irradiation for 12 hours. As the mixing ratio increased, the amount of MB in the solution decreased. Meanwhile, no changes in the amount of MB in the immersion solution were observed in the photocatalystfree resin specimen. Therefore, the results indicated that a denture base resin containing a photocatalyst might have a photocatalytic ability.

Antifungal activity of components used for decontamination of dental prostheses on the growth of Candida albicans

“…The best result was shown for chlorhexidine and essential oil-based mouthwash solutions, which may be justified by their potent antimicrobial effects that interfere with cellular permeability and plasma membrane intergrity 15,16,18 . Sousa et al 8 evaluated the effects of the disinfectant solutions chlorhexidine, sodium bicarbonate, vinegar and alkaline peroxide in terms of adherence of C. albicans to heat-activated acrylic resin.…”

“…Chlorhexidne digluconate is an effective wide spectrum antimicrobial, which has a bacteriostatic effect due to its capacity to precipitate and coagulate the microbial cytoplasm via low molecular weight components, such as phosphorus and potassium 15,16 . However, continued use may cause staining and alterations of color in the acrylic 17 .…”

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

“…One method is to mix TiO 2 with resin. [8][9][10] This approach causes weakening and color change (whitening) of the denture base. A preferable option is to use the TiO 2 coating method.…”

Biocompatibility of a titanium dioxide‐coating method for denture base acrylic resin

“…maniphalanx dysfunction or rheumatoid arthritis) find oral hygiene (OH) troublesome and require assistance from family or nursing staff 10 . TiO 2 can be incorporated into the resin 11,16,17 to achieve the photocatalytic effect but requires approximately 5wt% TiO 2 , which can weaken the material and cause internal decomposition through its photocatalytic effect. Hygienic denture materials would be invaluable in improving OH in denture wearers.…”

“…oxidation decomposition and super-hydrophilicity), and the viability of making dentures that can be cleaned simply by rinsing in water [13][14][15] . TiO 2 can be incorporated into the resin 11,16,17 to achieve the photocatalytic effect but requires approximately 5wt% TiO 2 , which can weaken the material and cause internal decomposition through its photocatalytic effect. A preferable option is to use TiO 2 -coating method, which does not alter the resin itself.…”