Metal-resin composite restorative material using powder-liquid system

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomaterials Engineering

Background:

• Previous metal-resin composites using a 2-paste system exhibited mechanical property limitations.
• A novel powder-liquid system was developed to overcome these issues.

Purpose of the Study:

• To develop and evaluate a new powder-liquid metal-resin composite system.
• To investigate the effects of 4-META concentration, immersion time, and filler content on composite properties.

Main Methods:

• Developed a powder-liquid metal-resin composite with low-temperature 4-META treatment.
• Separated DMPT from 4-META treated particles.
• Investigated flexural properties, working time, and setting time based on varying parameters.

Main Results:

• The powder-liquid composite achieved a highest flexural strength of 91.8 MPa, a 43% improvement over the 2-paste system (64.0 MPa).
• Flexural strength was primarily influenced by immersion time and filler content.
• Flexural modulus, working time, and setting time were affected by all three main factors (4-META concentration, immersion time, filler content).
• Optimal properties achieved with 0.1 4-META ratio, 30s immersion, and 94% filler content.

Conclusions:

• The powder-liquid system is effective in significantly improving the mechanical properties of metal-resin composites.
• This system offers a viable alternative to traditional 2-paste systems for enhanced performance.