The Effect of Various Surface Treatments on the Tensile Bond Strength of Denture Base Materials

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Koyu T., Tuğut F., Erol A. E.

48th Annual Conference of the European Prosthodontic Association (EPA), Nevşehir, Turkey, 11 - 13 September 2025, pp.153, (Summary Text)

  • Publication Type: Conference Paper / Summary Text
  • City: Nevşehir
  • Country: Turkey
  • Page Numbers: pp.153
  • Kütahya Health Sciences University Affiliated: Yes

Abstract

OBJECTIVES: The aim of this study was to evaluate the tensile bond strength of silicone-based soft lining material to denture base materials with different surface treatments (sandblasting, Nd:YAG laser, Er:YAG laser). 

MATERIALS-METHODS: In this in-vitro study, denture base materials were fabricated using three techniques: conventional, CAD/CAM milling, and 3D printing. Dumbbell-shaped specimens were prepared accordingly and randomly divided into four groups (n = 10) based on surface treatment: control (no treatment), sandblasting, Er:YAG laser, and Nd:YAG laser. After applying surface treatments, specimens were bonded with a 3 mm thick layer of silicone-based soft liner (Molloplast-B). All samples were stored in distilled water at 37°C for 24 hours prior to testing. Tensile bond strength was measured using a universal testing machine at a crosshead speed of 5 mm/min. The maximum tensile bond strength was noted in MPa. Data were analyzed using Shapiro-Wilk and ANOVA tests at a significance level of p =.05. 

RESULTS: The findings showed that the Nd:YAG laser significantly improved bond strength in conventionally fabricated denture base resins. For milled resins, surface treatments did not result in a statistically significant difference. However, for 3D-printed resins, all surface treatments significantly increased the bond strength compared to the control group (p < 0.05). Among all groups, 3D-printed samples showed the highest tensile bond strength, regardless of the treatment applied. 

CONCLUSIONS: Surface treatments increase the tensile bond strength between silicone-based liners and denture base resins. The most effective method was the Nd:YAG laser, particularly for conventional and 3D-printed bases. For milled bases, surface treatment had limited impact. Overall, applying surface treatment especially Nd:YAG laser to 3D-printed bases is highly recommended to achieve optimal bonding. 

Keywords: Nd:YAG Laser, Er:YAG Laser, Denture bases, 3D-Printing, CAD/CAM, Soft Lining Material