J Adv Prosthodont.  2013 Aug;5(3):270-277. 10.4047/jap.2013.5.3.270.

Effect of denture cleansers on surface hardness of resilient denture liners at various time intervals- an in vitro study

• Pahuja RK
• Garg S
• Bansal S
• Dang RH

• KMID: 2118166
• DOI: http://doi.org/10.4047/jap.2013.5.3.270

Abstract

PURPOSE
This study was aimed to determine the effect of two chemically distinct denture cleansers and water on the surface hardness of acrylic and silicone based soft denture liners at various time intervals.
MATERIALS AND METHODS
Two commonly used commercial resilient liner material were selected based on their chemical composition (silicone- and acrylic-based soft liners) for this investigation. 120 cylindrical specimens were made of 15 mm x 10 mm dimensions (according to ASTM: D-2240-64T) in a custom made metal mold. All specimens were stored in artificial saliva throughout the study. Forty specimens were cleansed daily in 0.5% sodium hypochlorite solution; forty were cleansed in sodium perborate and remaining forty specimens were daily rinsed in water. Testing was done at 1 week, 1 month, 3 months and 6 months for surface hardness using a Shore A Durometer. A mean of 3 reading for each sample was subjected to one-way ANOVA, Post Hoc test and pair-t test for statistical analysis. P values of less than 0.05 were taken as statistically significant.
RESULTS
Surface hardness of all the samples was significantly higher after a period of 6 months irrespective of the cleansing treatment. Minor changes were observed between control, sodium hypochlorite and sodium perborate groups with time. Greater change was observed in surface hardness of acrylic-based soft denture liners as compared to silicone-based soft liners for all groups, as time progressed.
CONCLUSION
Silicone-based soft denture liners performed significantly better in all cleansing treatments than acrylic-based soft denture liners.

Keyword

Soft denture liners; Denture cleansers; Surface hardness; Sodium hypochlorite; Sodium perborate

MeSH Terms

Borates
Denture Cleansers
Denture Liners
Dentures
Fungi
Hardness
Saliva, Artificial
Silicones
Sodium
Sodium Hypochlorite
Water
Borates
Denture Cleansers
Saliva, Artificial
Silicones
Sodium
Sodium Hypochlorite
Water

Figure

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  Fig. 1 Custom made metal mold.

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  Fig. 2 Fabrication of samples.

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  Fig. 3 Grouping of sample.

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  Fig. 4 Shore A Durometer.

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