Affiliation:
1. Department of Prosthodontics Faculty of Dentistry Pamukkale University Denizli Turkey
Abstract
AbstractPurposeThe aim of this study was to analyze the impact of various surface treatments and production methods on the shear bond strength (SBS) between reline material and denture base resins.Materials and MethodsOne‐hundred‐twenty specimens were produced using conventional heat‐polymerization, subtractive, and additive techniques. Each group consisted of 40 specimens. The specimens were divided into four subgroups, each with 10 samples, for surface treatments. These subgroups were: (1) Control‐only monomer application, (2) 50 μm airborne‐particle abrasion, (3) 110 μm airborne‐particle abrasion, and (4) Roughening with tungsten carbide bur. Representative specimens from each subgroup were examined under SEM. Then, auto‐polymerized resin was condensed in the center of the specimens. Specimens were subjected to thermal aging (5000 cycles at 5–55°C). The SBS test was conducted and failure loads were recorded. The data were evaluated by two‐way ANOVA and Tukey pairwise multiple comparisons method (p < 0.05).ResultsThe additively produced group showed significantly lower SBS than conventional and subtractive groups (p < 0.001), with no significant differences between the subtractive and conventional groups. Specimens that underwent monomer application only showed the lowest SBS among surface treatments, while 50 μm airborne‐particle abrasion showed the highest SBS. Based on the partial eta‐squared analysis results, the surface treatment mainly impacted SBS.ConclusionsAmong the surface treatment methods, treating denture bases with 50 μm airborne‐particle abrasion is more effective for maintaining adhesion, especially in the additive technique.