Tensile bond strength of soft and hard relining materials to conventional and additively manufactured denture‐base materials

• Published in: Journal of prosthodontics 2023-04, Vol.32 (S1), p.74-80
• Main Authors: Koseoglu, Merve, Tugut, Faik, Akin, Hakan
• Format: Article
• Language: English
• Subjects: 3D printed dentures; Acrylic Resins - chemistry; Additive manufacturing; Bond strength; Dental Bonding; denture base; Denture Bases; denture liner; Denture Liners; Dentures; Laboratories; Materials Testing; Polymethylmethacrylate; Resins; Surface Properties; Tensile Strength
• ISSN: 1059-941X; 1532-849X
• DOI: 10.1111/jopr.13608

Purpose Studies comparing tensile bond strength of various soft and hard denture liner materials to conventionally and additively manufactured denture base resins are lacking. The purpose of this study was to investigate the tensile bond strength between chair‐ and laboratory‐side soft and hard relining materials and denture‐base materials produced by additive manufacturing and conventional methods. Materials and methods A total of 120 dimethacrylate‐based additively manufactured and polymethylmethacrylate (PMMA)‐based conventionally fabricated dumbbell‐shaped denture‐base resins were produced. Heat‐cured laboratory‐side soft reline material, self‐cured chair‐side soft reline material, and self‐cured chair‐side hard reline material were attached to the denture bases. The tensile force was applied to the specimens with a universal testing machine at a crosshead speed of 5 mm/min. The obtained data were analyzed with two‐way ANOVA and post hoc Tukey tests. The significance level was set at α = 0.05. Results The highest tensile bond strength values were obtained in the specimens from the conventionally manufactured base and self‐cured chair‐side hard reline material group, and the lowest was seen in the additively fabricated base and self‐cured chair‐side soft reline material group (p