Evaluation of Peel Bond Strength between Heat Cured Acrylic Based Denture Soft Lining Material and Heat Polymerized Acrylic after Different Acrylic Surface Treatment Methods

Abstract

<jats:p>Background: In dentures that involve soft liner materials, it is important that the attachment to soft liners is preserved for an extended period to ensure maintenance of prosthetic parts and patient satisfaction. Debonding can be prevented by a variety of acrylic surface treatments to enhance the connection between the different materials. Methods: 30 specimens were fabricated (30 soft-liner specimens bonded to 30 acrylic specimens). All specimens were 75mm x 10mm x 2mm in dimensions. After bonding, 10 specimens were categorized into each group according to each surface treatment. Acrylic bonding surfaces were treated according to each method and a primer was then applied. Soft liner was mixed and poured inside the matrix part of the mold with acrylic specimens. Peel strength test was measured using a universal testing machine. Specimens were categorized according to failure mode into cohesive, adhesive, and mixed failures. Results: homogeneity of variance and One way ANOVA were utilized. Ethyl acetate group with had the highest peel strength values (4.5138) followed by sandblasting group (3.4633) and silicon carbide paper group (2.9082) respectively. Conclusions: Acrylic specimens treated by ethyl acetate solution, sandblasting, and Silicon carbide paper before bonding to soft liners can provide significant increase in peel strength values which can improve the maintenance of prosthetic parts.</jats:p>