The first thing is how the tooth is prepared. Generally the bond strength is stronger if enamel which is the first layer of tooth tissue is remaining on the tooth. So if the tooth is prepared aggressively then generally all the enamel is drilled off so this decreases the bonding strength and can cause the veneer to debond. This can be counteracted by wrapping the veneer over more of the tooth tissue.

The second thing is how the veneer is prepared before it is fitted. The fitting surface of the veneer does need to be treated with some agents prior to sticking the veneer on the tooth.

The third thing is how the tooth is prepared before it is fitted. Again due to the bonding process the tooth needs to be treated with a bonding agent so the veneer can stick to the tooth with a good level of strength.

The fourth thing is when the veneer is fitted this should be done under dry conditions using retraction and a rubber dam.

The fifth and final thing is that the way you bite your teeth is taken into consideration and adjusted if needed.

If all these things are taken account of then the veneers should realistically last over 10 years.

Most cosmetic dentists like myself guarantee all the porcelain veneer work for 5 years. hope this is helpful and puts faith back into veneers for you.

If you require any further help please don’t hesitate to contact me.