Yes, it can be a worry. If a veneer/lumineer comes off it may cause sensitivity, it may put you in an embarrassing situation, it may create hassles seeing your dentist again, and it may cost you more money and time. If you need a new veneer/lumineer the colour or shape may not be the same or it may not bond correctly. These are concerns that should be addressed before undergoing the treatment. Be sure that your dental surgery use up to date gluing techniques. Latest materials incorporate nano technology which are proven to be very effective. Our patients are informed that veneers can debond before we start prescribing them. A small percentage of veneers debond. Maybe 4%. - From 100 veneers perhaps 4 come off. If you outweigh the successes, the failures are remote. Tests have shown that when a block of ceramic with an area of 1mm*1mm is correctly bonded to dentin with an area of 1mm*1mm it takes 30N or 3 kg to debond. If you have an area of the size of the veneer it would take a human's weight to debond. If the veneer overlaps the tooth by 1.5mm and has a particular shape, it can strengthen a natural tooth. These are findings according to Magne. Dentin bonding is vitally important for the success of veneers and your dentist needs to be up to date with the bonding techniques and materials. Your dentist has an important role to play, as we do. We inform our patients that veneers can debond, but if they do we would replace them within 24-48 hours if needed. Our veneers are also guaranteed for a period of three years provided that a proper maintenance program is adhered to. These positive gestures take the worry out of veneers. Sincere regards M Teiniker