Effect of Surface Modification on the Shear Bond Strength Between 3D-Printed Denture Bases and Artificial Teeth
Abstract:
This study evaluates the impact of
various surface modifications on the shear bond strength (SBS) between
3D-printed denture bases and artificial teeth, aiming to enhance the clinical
performance of prostheses. A total of 120 specimens were fabricated using 3D
printing technology and categorized into six groups (n=20 per group) based on
surface treatments: control (no treatment), sandblasting, silica coating,
adhesive primer application, laser irradiation, and a combination of
sandblasting and adhesive primer. SBS was measured using a universal testing
machine at a crosshead speed of 1 mm/min. Statistical significance was
determined using one-way ANOVA (p < 0.05). The mean SBS values (MPa) for
each group were as follows: control (5.2 ± 0.8), sandblasting (7.8 ± 1.1),
silica coating (8.3 ± 1.0), adhesive primer (9.1 ± 1.3), laser irradiation
(10.5 ± 1.5), and combined treatment (12.2 ± 1.7). The combined sandblasting
and adhesive primer treatment demonstrated a 134.6% increase in SBS compared to
the control group, indicating the highest bonding efficiency. Post-failure
analysis revealed cohesive failure patterns in groups with higher SBS values,
suggesting improved adhesion. Surface modifications significantly enhance the
SBS between 3D-printed denture bases and artificial teeth. The combined
sandblasting and adhesive primer treatment resulted in the highest bond
strength, offering a promising strategy to improve the durability and longevity
of 3D-printed denture prostheses. These findings provide valuable insights for
optimizing denture fabrication protocols in clinical practice.
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