It‘s going to be a little uncomfortable in the first few weeks. During that, it’s better if you cut down your food into smaller pieces so that it is easier to chew. Soft foods should be preferred. However, with time, you can go back to your normal eating habits. Still, you should always be careful about foods that are too hard, hot, or pointy (don’t use toothpicks for that reason). Also, you shouldn’t chew gum. That’s because it can stick to the plastic and even damage it.