Before any kind of restoration can be placed, your dentist will need to thoroughly examine your oral health to make sure you are in good enough shape to receive the replacement. A patient who suffers from tooth decay or gum disease will need to have those issues dealt with first before continuing with the veneer procedure. Veneers are a cosmetic restoration, and they will not help you if you have any health problems with your mouth.
If you are in good health, your precise problem will need to be examined to make sure that a veneer is the best choice. If you suffer from severe misalignments or if the gap between teeth is too great, then your dentist may recommend dental crowns or orthodontic treatment to correct the problem.