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Niobium silicate particles as bioactive fillers for composite resins
Gabriela de Souza Balbinot1, Vicente Castelo Branco Leitune1, Fabricio Aulo Ogliari2
1Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Dental Materials : Official Publication of the Academy of Dental Materials
|September 30, 2020
Summary
Niobium silicate particles offer a promising alternative filler for composite resins, balancing key physical, chemical, and biological properties for enhanced bioactive materials.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Dental composite resins are widely used restorative materials.
- Optimizing their physicomechanical and biological properties is crucial for clinical success.
- Novel filler materials are continuously investigated to improve composite resin performance.
Purpose of the Study:
- To evaluate the influence of niobium silicate (SiNb) particles on the properties of an experimental composite resin.
- To compare SiNb-filled composites with a control group using barium silicate glass (SiBa) filler.
- To assess the potential of SiNb as a bioactive filler material.
Main Methods:
- Experimental composite resins were formulated with 50 wt% SiNb or SiBa filler in a Bisphenol A-Glycidyl Methacrylate and Triethylene Glycol Dimethacrylate matrix.
- Properties evaluated included refractive index, polymerization kinetics, flexural strength, radiopacity, solvent resistance, pH, cytotoxicity, and mineral deposition.
- Standardized testing protocols were employed for all measurements.
Main Results:
- SiNb composites exhibited a lower refractive index (1.43-1.45) compared to SiBa (1.50-1.52).
- No significant differences were found in degree of conversion, flexural strength, or solvent softening.
- SiNb fillers showed lower radiopacity but enhanced cell viability and increased mineral deposition in simulated body fluid.
Conclusions:
- Niobium silicate particles demonstrate potential as an alternative inorganic filler in composite resins.
- SiNb offers a favorable balance of physicomechanical and biological characteristics.
- These findings support the development of novel bioactive composite resins using niobium silicate.
