You may be surprised to learn that composite resin fillings are more durable and effective at protecting teeth from bacteria than metal ones. When a metal filling is placed, it’s designed to fill the cavity as much as possible to cover the vulnerable pulp underneath. However, as you chew, the filling acts as a wedge and pushes the tooth apart, causing it to fracture more over time.
Composite resin bonds to your tooth instead of pushing it apart, creating a more effective seal between your remaining tooth and oral bacteria. It’s also better at withstanding the consistent pressure that comes with regular chewing and grinding that your mouth performs. In fact, composite resin fillings help retain 70 to 80 percent of your natural tooth strength.