Niobium silicate as a filler for an experimental photopolymerizable luting agent

Purpose: To synthesize niobium silicate particles (SiNb) and incorporate into resin-based luting agents. Methods: SiNb were synthesized characterized by x-ray diffraction, FTIR spectroscopy, particle size, specific surface area. Luting agents formulated with 50 wt% BisGMA, 30 TEGDMA 20 UDMA. BAPO was used as a photoinitiator in 1mol%. The incorporated the at concentrations of (SiNb50%) or 65% (SiNb65%). Barium glass same controls (SiBa50% SiBa65%). Refractive index, degree conversion (DC), polymerization kinetics, softening solvent, radiopacity, film thickness, color stability, flexural strength (FS) micro shear bond (µSBS) evaluated. Results: successfully an adequate structure to be applied inorganic fillers. groups had higher DC, lower %ΔKHN, greater thickness radiopacity than SiBa groups. Color stability for SiNb50% SiNb65% after six months storage, demonstrated ΔE00. ΔWID values FS results decreased over time, found SiNb. In µSBS, 24 h (45.22 MPa) (36.83 MPa), statistically differences from Conclusions: using sol-gel method, their incorporation concentration up improved physicomechanical characteristics these