Evaluating The Effect Of Different Denture Cleansers On The Tensile Bond Strength Between High Impact Acrylic Denture Base Materials With Two Types Of Soft Liners – An In Vitro Study

Abstract

Aim: The aim is to determine how various cleaning agents affect the adhesion between the materials, which is crucial for the longevity and performance of prosthesis. Materials and Methods: A total of 80 PMMA (Polymethyl Methacrylate) specimens were prepared and divided into two main groups (n = 40), each corresponding to a different soft liner material. Each group was further subdivided into four subgroups (n = 10) based on the cleansing agent used. Specimens were prepared using a spacer-containing die, with the soft liner applied between two acrylic resin samples. The specimens were subsequently immersed in different denture-cleansing solutions for the designated exposure period. Statistical Analysis Used: Tensile bond strength was measured, and statistical analysis was performed using the Shapiro–Wilk test followed by post-hoc analysis. Results: Viscogel exhibited significantly higher tensile bond strength compared to the GC liner (p = 0.001). The type of cleansing agent significantly affected bond strength, with soap solution showing the highest values and Polident causing the greatest reduction (p = 0.001). Post-hoc analysis revealed a significant decrease in tensile strength with Polident and Densive compared to the control group. No statistically significant difference between the two liners was observed in the Polident group. Conclusion: Denture cleansers significantly influence the bond strength of soft liners to high-impact acrylic resin. Viscogel demonstrated superior bonding performance compared to the GC liner. Chemical cleansers, particularly Polident, adversely affected bond strength, while soap and water had minimal impact.