Interaction of silane with 10-MDP on affecting surface chemistry and resin bonding of zirconia

•10-MDP can adsorb onto zirconia mainly via ionic bond to generate P-O-Zr bonding.•Silane affects the adsorption of 10-MDP by enhancing the hydroxylation of zirconia.•TOF-SIMS analysis revealed the structural chemical information at the interface. [Display omitted] To investigate the effect of silan...

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Bibliographic Details
Published in:Dental materials 2022-04, Vol.38 (4), p.715-724
Main Authors: Ye, Shu, Chuang, Shu-Fen, Hou, Sheng-Shu, Lin, Jui-Che, Kang, Li-Li, Chen, Yung-Chung
Format: Article
Language:English
Subjects:
Adsorption
Affinity
Bonding
Bonding strength
Chemical bonds
Chemical composition
Dental Bonding
Depth profiling
Durability
Hydrogen bonding
Hydrogen bonds
Hydrophilicity
Hydroxylation
Interfaces
Ions
Mass spectrometry
Mass spectroscopy
Materials Testing
MDP
Methacrylates - chemistry
NMR
Nuclear magnetic resonance
Resin bonding
Resin Cements
Scientific imaging
Secondary ion mass spectrometry
Shear Strength
Silane
Silanes
Sintering (powder metallurgy)
Slabs
Solid-state nuclear magnetic resonance spectrometry
Spectroscopy
Surface chemistry
Surface Properties
Thermal cycling
Time-of-flight secondary ion mass spectrometry
Zirconia
Zirconium - chemistry
Zirconium dioxide
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Summary:•10-MDP can adsorb onto zirconia mainly via ionic bond to generate P-O-Zr bonding.•Silane affects the adsorption of 10-MDP by enhancing the hydroxylation of zirconia.•TOF-SIMS analysis revealed the structural chemical information at the interface. [Display omitted] To investigate the effect of silane contents on their chemical interaction with 10-methacryloyloxydecyl-dihydrogen phosphate (MDP), and affecting the bonding of MDP to zirconia by time-of-flight secondary ion mass spectrometry (TOF-SIMS) and solid-state nuclear magnetic resonance (SSNMR) spectroscopy. Zirconia (Cercon ht, Dentsply) slabs were prepared and fully sintered. Experimental primers SE-5 and SE-10 were formulated by adding 5 wt% and 10 wt% γ-methacryloxypropyltrimethoxysilane to an MDP-based primer SE BOND (SE), respectively. SE, SE-5, and SE-10 were applied on the assigned zirconia slabs. The chemical compositions on the surface and adhesive interfaces were examined by TOF-SIMS in a depth-profiling mode. Hydrophilicity and resin affinity of treated zirconia were analyzed. The bond strengths to resin cylinder were examined either after 24-h storage or thermocycles. In addition, zirconia powders treated with three primers were assessed by SSNMR spectrometry for the adsorption of MDP. TOF-SIMS analysis showed that SE treatment generated the greatest amount of P-O-Zr related ions, which reduced in SE-5 and SE-10 groups. The 3D ion-images illustrated the generation of ZrO2(OH)- ions with silane contents. The SSNMR analysis revealed that the chemical bonding was mainly P-O-Zr ionic bonds in SE but shifted to P-OH-Zr hydrogen bonds in SE-5 and SE-10. SE-5 and SE-10 treated zirconia presented higher hydrophilicity and affinity to resin compared to Zr did. SE showed the highest initial bond strength which significantly decreased after thermocycling. MDP adsorption onto zirconia via P-O-Zr ionic bond promotes bonding with resin. The silane enhances the hydroxylation of zirconia and impairs the adsorption of MDP, but does not adversely affect the bond durability.
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2022.02.014