[PDF][PDF] A comparative evaluation of soft denture liners
Statement of problems: Two potential problems commonly identified with a denture base
incorporating a resilient liner are a failure of the bond between the acrylic resin and resilient
liner material and colonization of Candida albicans over time. Aims: This in vitro
experimental study evaluated the shear and compressive bond strength as well as
colonization of Candida albicans of commonly available denture soft liners. Materials and
methods: The denture liners investigated were acrylic resin-based heat-polymerized (Super …
incorporating a resilient liner are a failure of the bond between the acrylic resin and resilient
liner material and colonization of Candida albicans over time. Aims: This in vitro
experimental study evaluated the shear and compressive bond strength as well as
colonization of Candida albicans of commonly available denture soft liners. Materials and
methods: The denture liners investigated were acrylic resin-based heat-polymerized (Super …
Abstract
Statement of problems: Two potential problems commonly identified with a denture base incorporating a resilient liner are a failure of the bond between the acrylic resin and resilient liner material and colonization of Candida albicans over time.
Aims: This in vitro experimental study evaluated the shear and compressive bond strength as well as colonization of Candida albicans of commonly available denture soft liners. Materials and methods: The denture liners investigated were acrylic resin-based heat-polymerized (Super soft) and auto-polymerized (Refit and Softliner) resilient liner. The resilient liners were processed according to manufacturers’ instructions. The soft liners specimens for testing colonization of Candida albicans (n= 10) were
6× 3 mm. The soft liner specimen for shear and compressive strength testing (n= 5) were of 6 mm diameter and 3 mm thickness. Specimens shape and linear thickness were standardized. Specimens were stored for 48 hrs, 1 week and 2 week interval for incubation at 37oC. The growth around and below the surface of the specimens were read as positive. Shear and compressive strength were measured in a universal testing machine at a crosshead speed of 20 mm/min and 2mm/min respectively. Student “t” test and ANOVA were used to analyze the data. Result: Results showed that with the increase in time for incubation of test materials with Candida albicans, the adherence property of the material was increased in heat-cured and auto-polymerized soft liners. There was significant difference in compressive and shear bond strength among different soft liners. Conclusion-Within the limitation of this in vitro study, specimens of soft liners shows equal number of growth of Candida albicans and significant difference in shear and compressive bond strength.
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