Silica-filled methacrylic composites with extremely high compressive strength.

Area of Science:

• Materials Science
• Biomaterials Engineering
• Polymer Chemistry

Background:

• SYLOID® 244 silica has not been previously investigated as a filler in dental composites.
• Developing advanced dental restorative materials requires novel filler components.
• Methacrylic composites are widely used in dentistry due to their favorable properties.

Purpose of the Study:

• To evaluate the efficacy of unmodified and diazonium salt-modified SYLOID® 244 silica as fillers in light-cured methacrylic composites.
• To assess the impact of SYLOID® 244 incorporation on the physicochemical properties of dental composites.
• To determine the suitability of modified SYLOID® 244 for potential dental applications.

Main Methods:

• SYLOID® 244 silica was modified using diazonium salt treatment.
• Methacrylic composites were prepared with varying mass ratios of modified and unmodified SYLOID® 244.
• Raman spectroscopy confirmed the effectiveness of the silica modification process.
• Key physicochemical properties including depth of cure, mass stability in saline, flexural strength, and compressive strength were evaluated.

Main Results:

• The modification process of SYLOID® 244 silica was successfully confirmed via Raman spectroscopy.
• Methacrylic composites containing modified SYLOID® 244 exhibited improved physicochemical properties compared to those with unmodified silica.
• Enhanced depth of cure, superior mass stability, and increased flexural and compressive strengths were observed in composites with modified SYLOID® 244.
• Unfilled resin served as a control group for property comparison.

Conclusions:

• Diazonium salt modification significantly enhances the performance of SYLOID® 244 when used as a filler in methacrylic composites.
• The modified SYLOID® 244 demonstrates high applicability and potential for use in dental restorative materials.
• This research opens new avenues for utilizing advanced silica fillers in the development of next-generation dental composites.