Evaluation of Tensile Bond Strength of Heat‑Polymerized Acrylic Soft Liners with Various Surface Pre‑Treatment of Denture Bases: An In Vitro Study
Journal Title: Indian Journal of Dental Advancements - Year 2018, Vol 10, Issue 2
Abstract
Background: Resilient liners are prone to bond failure with acrylic resin base, creating an environment for bacterial growth and accelerated break down of soft liner, resulting in a deteriorating prosthesis. Aims and Objectives: The purpose of the present study is to evaluate the efficacy of mechanical, chemical, and mechanochemical pre-treatment of denture base resin on the tensile bond strength of heat-cured permanent resilient liners. Materials and Methods: A total of 320 cuboidal blocks (40 mm ×x 10 mm x 10 mm) of heat-polymerized acrylic resin (Trevalon) were made which were equally grouped into Permasoft (Group 1) and Acrasoft (Group 2). Each group was further subdivided into four subgroups based on surface pre-treatment of denture base, namely: Control, chemical (methyl methacrylate [MMA]), mechanical (sandblasting with 250 µ aluminum oxide particles), and mechanochemical (sandblasting followed by MMA). A 3-mm thick resilient denture liner was packed between two resin blocks. Then, each subgroup was divided into two test groups ( n = 10) for testing tensile bond strength (using universal testing machine) after 24 h and 30 days post-immersion in artificial saliva. One-way ANOVA and Tukey test were used for data analysis. Results: The tests resulted in greater tensile bond strength for Acrasoft group compared to Permasoft at both 24 h and 1 month. Between the two time periods, it was more for 24 h group. Among all methods, mechanical method resulted in superior tensile bond strength. Conclusion: This in vitro study concluded that all the tested pre-treatment methods showed better tensile bond strength than control group, maximum with mechanical group.
Authors and Affiliations
Hari kumar Mempally, Jayasree Komala, Sri Guru Mangala Deepti Ganji
Keywords
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- EP ID EP471576
- DOI 10.5866/2018.10.10065
- Views 82
- Downloads 0
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