Before you receive your permanent veneer you will first receive a temporary restoration. This is not as sturdy as the permanent version, so you should be careful when cleaning and eating. You should brush the area gently and should not pull up on the tooth when flossing because it could become dislodged. The same goes for eating. You should avoid sticky or chewy foods while you have the temporary in.
There may be some sensitivity and irritation after the temporary or permanent is placed. This is normal and will subside after the soft tissue heals. A warm salt water rinse will help, and you can also take Advil or Tylenol if the pain does not go away.
When the veneer is placed it may feel a little awkward for a few days. Your mouth needs to adjust to the new tooth, and it should feel like one of your natural tooth in less than a week. If your bite feels abnormal in any way, you should let your dentist know. When brushing and flossing you should pay close attention to the area between the veneer and the tooth at the gum line.