Aim: The aim of this study was to evaluate the bond strength of soft lining material to polyamide denture material. Materials and Methods: Twenty-five polyamide denture base materials and soft denture lining material were used in this study. The samples were divided into five groups according to the surface treatments: Group 1 (Control): No surface treatment Group 2: Samples were sandblasted with 5o µm Al 2 O 3 powder. Group 3: Samples were grinded with a diamond bur. Group 4: Samples were

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... d with % 37 Orthophosphoric acid. Group 5: Retention holes were slotted with diamond bur to samples. Then the samples were tested in tensile mode in a universal testing machine at cross-head speed of 0.5 mm/min. The statistically analysis of obtained data were performed with use one-way analysis of variance test. Results: The results showed that the highest bond strength value (92.54 N) was identified in Group 3, the lowest bond strength value (31.56 N) in Group 4. The result of one-way analysis of variance test showed that there were not statistically significant differences between the groups. (p>0.05) Conclusion: As a result of this study, the surface treatments were not affected on bond strength of soft lining material to polyamide denture material.