Year : 2018

Volume : Volume 9

Issue : Issue 3

Address for correspondence :
Dr. Mempally Hari Kumar.
MempallyHariKumar@gmail.com

Abstract

Background:  Soft denture liners protect the denture bearing mucosa by acting as a cushion that evenly distribute functional load, avoiding local stress concentrations and improving retention of dentures there by providing comfort to the patient. The aim of the present study was to assess the tensile bond strengths of heatpolymerized acrylic soft liners with various surface pre-treatment of denture bases. Material and methods: A 192 cuboidal blocks of heat-polymerized acrylic resin were made which were equally divided into two groups i.e Permasoft (Group 1) and Acrasoft (Group 2). Each group was further subdivided into four subgroups based on surface pre-treatment of denture base which was named as: Control, chemical, mechanical, and mechanochemical. A 3-mm thick resilient denture liner was packed between two resin blocks. Then, each subgroup divided into two test groups (n = 6) 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 showed result that there was 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 mechanical method was in superior tensile bond strength. Conclusion: This study conclude that all the tested pre-treatment methods showed better tensile bond strength than control group and it was maximum for mechanical group.

Keywords: Permasoft, Acrasoft, mechanical method.