Citation Information :
Ata SO, Ugurlutan R. Tensile Bond Strength of Hypoallergenic Acetal Resin and Heat-cured Acrylic Resin to Soft Denture Liners. Int J Prosthodont Restor Dent 2022; 12 (4):162-166.
Purpose: The purpose of this research was to evaluate the tensile strength of hypoallergenic acetal resin, heat-cured polymethylmethacrylate (PMMA) resin, to acrylic and silicone-based lining materials.
Materials and methods: Heat-cured PMMA resins and acetal resins (pink) were used as denture base materials and samples were prepared with a dimension of 10 x 10 x 43 mm blocks (n = 16 each). Silicone-based liner (soft-liner tough) and acrylic resin-based liner (Visco-gel) specimens were processed between heat-cured PMMA resin blocks and acetal resin blocks (3 x 10 x 10 mm). The groups were denoted as HCAS—heat cure-soft-liner tough group, n = 8; HCAV—heat cure-Visco-gel group, n = 8; ACS—acetal resin-soft-liner tough group, n = 8; ACV—acetal resin-Visco-gel group, n = 8. On a universal testing machine with a crosshead speed of 1 mm/minute, the tensile bond strength was determined. Bonferroni HSD and one-way analysis of variance (ANOVA) test were used for data analysis (p < 0.05 was considered significant).
Results:There were significant differences in bond strength across groups (p < 0.001). The acetal resin group exhibited lower bonding strength values than the heat cure PMMA resin group. The tensile bond strength of Visco-gel [0.88 ± 0.09 megapascals (MPa), HCAV group; 0.29 ± 0.04 MPa, ACV group] was higher than Soft-liner Tough (0.62 ± 0.38 Mpa, HCAS group; 0.19 ± 0.34 MPa, ACS group) in both resins. Mostly adhesive failures were seen in all groups. Intergroup comparison showed significant differences between all groups except for ACV vs ACS (p = 1.000).
Conclusion: Regardless of the liner type, acetal resin demonstrated the lowest tensile strength values. Heat-cured acrylic with Visco-gel liners performed better than silicone-based liners and was preferred in patients who did not exhibit hypersensitivity.
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