Bonding is a cosmetic filling used to change the size or shape of your teeth, creating a smile that appears more symmetrical ans space free. To fill in defects or cavities, a bonding material made from resin is applied to the teeth. Fillings made from silver/amalgam can be hazardous to your health. Dr. Salmassian takes prides in providing a metal free fillings. Composite resins fillings can perfectly match the physical characteristics and color of natural teeth, and actually strengthening them in the process.