Pilipda Janyaprasert. Evaluation of tensile bond strength of various denture relining materials to conventional and cad/cam manufactured denture base polymers. Master's Degree(Prosthodontics). Chulalongkorn University. Office of Academic Resources. : Chulalongkorn University, 2569.
Evaluation of tensile bond strength of various denture relining materials to conventional and cad/cam manufactured denture base polymers
Abstract:
This study was to investigate the tensile bond strength (TBS) of autopolymerized, heat-polymerized, milled, and 3D printed denture base materials bonded to 2 acrylic-based and 2 silicone-based denture liners, both before and after thermocycling. Four different denture base materials (Palapress (PL), Vertex Rapid Simplified (VR), Smile CAM total prosthesis (SC), and NextDent denture 3D+ (ND)) bonded to 2 acrylic-based (GC Soft-Liner (GC) and Tokuyama Rebase II (RB)) and 2 silicone-based (Ufi Gel P (UP) and Sofreliner Tough M (ST)) denture liners were tested. Specimens (n=8) were divided into non-thermocycling and thermocycling groups. Data were analyzed using 2-way ANOVA and Tukey HSD tests (α=.05), and independent samples t test (α=.05) for TBS between non-thermocycling and thermocycling groups. Non-thermocycling showed no significant differences between denture base materials except for ND+RB, which had lower TBS. Thermocycling showed PL with the highest and ND with the lowest TBS within the same liner material. in both non-thermocycling and thermocycling groups, ST exhibited the highest TBS, while GC showed the lowest. Thermocycling had minimal impact on TBS, except for ST, SC+UP, and ND+UP groups. In conclusion, acrylic and silicone-based denture liners can effectively bond to milled denture bases, but caution is advised with 3D printed bases. Thermocycling did not affect TBS with acrylic liners but affected silicone-based liners' bond strength.