Bond Strength of Soft Lining Material to Polyamide Denture Material

Abstract

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 etched 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.

Estimation of the autoclave and different surface treatments on microleakage between soft liner and heat-cured acrylic

“…Also, other research showed there was an improvement in the peel strength by surface treated with Al 2 O 3 or CO 2 laser, one of the factors that might affect the outcomes in laser group in different studies is the rate of scanning of the laser tip and the distance of the tip to the surface [26], the scan rate could result in different cavities on the surface of acrylic resin. The use of the laser in the focus or defocus mode might also affect the ability to create pits by the laser beams [44]. In this study in the comparison between Al 2 O 3 group and CO 2 laser group, the Al 2 O 3 had decreased value of microleakage in comparison to CO 2 laser this could be explained by the roughened acrylic denture base by laser might have pits in discontinuities manner that didn't lead to enough penetration of the liner into them that created gaps and oral fluids accumulation [11 ,45].…”