After the filling is placed, you may notice some sensitivity to hot and cold initially, but rest assured, this is normal and temporary. As your tooth acclimates to the new composite filling, the sensitivity will gradually fade away. Your dentist will offer essential care instructions, and maintaining a routine of brushing, flossing, and regular dental cleanings will significantly prolong the life of your new filling. While composite fillings are sturdy and can keep going for a long time, they are not extremely durable and may require substitution later on. By following proper oral care and attending regular dental check-ups, you can enjoy a healthy, long-lasting smile. Remember, taking proactive measures like these will help keep your smile bright and healthy for years to come.