While modern dentures are designed to be durable, certain hard or sticky foods can damage them or cause discomfort. It's best to avoid hard nuts, popcorn kernels, hard candy, and chewy candy like caramel. Sticky or hard foods can dislodge or break dentures. Initially, while you are still getting used to your dentures, it's also wise to steer clear of overly tough meats or crusty breads. Gradually introduce different foods to see how your dentures perform.