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Effect of nanoparticle infiltration into the opaque agent of pink composite resin on its bond strength with base metals
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DOI：10.1080/01694243.2026.2643790.png)
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Abstract
En 中文
The aim of this study was to evaluate the effect of titanium dioxide (TiO2) nanotube incorporation into the opaque agent of a pink composite resin (PCR) on its bond strength to two different base metal alloys.
A total of 84 CoCr and Ti specimens (4 mm in diameter, 2 mm in height) fabricated via SLS/DMLS were assigned to eight experimental and four control groups (n = 7). All metal surfaces were sandblasted and primed. TiO2 nanotubes synthesized in a chemistry laboratory were incorporated into the opaque agent of PCR at 0.5% and 1.0% (w/w). Control groups were coated with heat-polymerized acrylic resin and PCR. Shear bond strength (SBS) between metal–resin interfaces was measured using a universal testing machine. Microscopic and spectroscopic analyses were performed to assess nanotube incorporation and characterize interfacial failure.
The highest SBS values were observed in the CoCr-TiO2n4 (18.5 MPa) and Ti-TiO2n4 (16.2 MPa) groups, whereas the lowest SBS values belonged to the acrylic resin control groups (CoCr-A: 5.0 MPa; Ti-A: 4.6 MPa). A statistically significant difference was detected between the Ti-TiO2n2 and Ti-TiO2n4 groups (p = 0.033).
Incorporation of functionalized TiO2 nanotubes into the opaque agent tended to improve the bond strength of PCR to metal substrates. These findings indicate potential benefits of nanotube integration; however, further studies with larger sample sizes and optimized concentrations are recommended.
Keywords:
Composite resins
titanium dioxide nanotubes
dental materials
shear bond strength
fixed prostheses
Journal
J
IF:
3.7
Papers:
346
Citations:
6.8K
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