Effect of denture cleansers, surface finish, and temperature on Molloplast B resilient liner color, hardness, and texture.
OBJECTIVE
The purpose of this study was to compare color, texture, and Shore A hardness of a resilient silicone denture liner with as-polymerized, roughened, or pumiced surfaces after treatment with perborate-, persulfate-, or hypochlorite-containing denture cleansers at 25 degrees or 55 degrees.


METHODS
Fifty-eight specimens that each exhibited an as-polymerized, a roughened, and a pumiced area were exposed to 5 different commercially available perborate-, persulfate-, or hypochlorite-containing denture cleansers at 25 degrees or 55 degrees continuously for 4 (1/2) months. The solutions were replaced twice a day. Control specimens were soaked in water with no cleanser. Before and after the 4 (1/2) -month cleaning regimen, the color, hardness, and texture of resilient liner surfaces were evaluated using a color densitometer, a Shore A durometer (Shore Instrument & Mfg Co, Freeport, NY), and a surface profilometer, respectively. Differences among groups after the cleanser treatment were determined using a repeated measures analysis of variance (alpha = 0.05) and a Tukey's Honestly Significant Difference post hoc test.


RESULTS
Roughened specimen surfaces after 25 degrees or 55 degrees cleanser treatment exhibited significant color loss with some perborate-containing cleansers compared with the control. Roughened specimens treated at 55 degrees with perborate-containing cleansers also exhibited significantly greater color loss than those treated with the persulfate-containing cleanser. With roughened surfaces, significantly greater hardness was found with some perborate-containing cleanser compared with a hypochlorite-containing cleanser after treatment at 25 degrees. No differences were observed in surface texture based upon cleanser treatment.


CONCLUSIONS
After silicone resilient denture liner treatment with certain perborate-containing denture cleansers, a greater amount of components could leach from the liner leading to a loss of color if the liner surface is rough.
Tan
H
H
Department of Dentistry, University of Alberta, Edmonton, Alberta, Canada. htan@ualberta.ca
Woo
A
A
Kim
S
S
Lamoureux
M
M
Grace
M
M
D000704:Analysis of Variance; D001881:Borates / Q000737:chemistry; D003116:Color; D003720:Densitometry; D003775:Dental Polishing; D003820:Denture Cleansers / Q000737:chemistry*; D003822:Denture Liners; D004058:Diffusion; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004202:Disinfectants / Q000737:chemistry; D006244:Hardness; D006801:Humans; D016014:Linear Models; D011108:Polymers / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry*; D012973:Sodium Hypochlorite / Q000737:chemistry; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013431:Sulfates / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D014867:Water
D001881:Borates; D003820:Denture Cleansers; D004129:Dimethylpolysiloxanes; D004202:Disinfectants; C020964:MDX 4-4210; D011108:Polymers; D017680:Potassium Compounds; D017640:Silicates; D012826:Silicone Elastomers; D013431:Sulfates; D014867:Water; C009007:potassium persulfate; C102654:Polident; D012973:Sodium Hypochlorite; C005144:pumice; C027707:sodium perborate