Occasionally, it happens. Despite all precautions, post treatment complications may occur. But it’s not acceptable when it happens more than once. If your teeth are properly prepared and the veneers have been correctly bonded, then they should not fail in the absence of problems related to the alignment of your bite.
Failed porcelain veneers can be caused by:
Most often it is a failure of improper bonding. Bonding porcelain to teeth is a technically sensitive procedure. Careful assessment, additional substantive treatment, precise clinical and laboratory techniques are critical aspects to ensure the veneers enjoy optimal longevity and aesthetic beauty.
How difficult is it to have them re-done?
Old veneers can be removed, but it is very tedious and technique sensitive. The question is how well were the teeth prepared prior having the veneers bonded? Where an excessive amount of tooth structure was removed the removal may ultimately compromise the longevity of the teeth and veneers. This of course is not a reason to live with unacceptable veneers, just a cautionary bit of ‘informed consent’.
Porcelain veneers have been shown to be a good conservative and aesthetic treatment option. However they do have limitations and they are not an acceptable solution for every patient. Before treating a patient with porcelain veneers, the determination of the patient’s oral environment requires a properly trained clinician.
If we can be of assistance or answer any of your questions please do not hesitate to contact us.
Novy Scheinfeld, DDS, PC
Prosthodontics Training from Emory University
290 Carpenter Drive, 200A
Atlanta (Sandy Springs), GA 30328
 Prep design and patient selection have an enormous influence on the veneer’s success rate. Unfortunately, there are providers who are willing to sacrifice certain ethical considerations in order to generate additional revenues.
 If the surfaces are not properly prepared and free of contaminants such as foreign substances, water or saliva, there will be a bond failure.