It is true that it is some times possible to place lumineers over existing crowns – in fact lumineers are just the same as any porcelain veneers but have been “branded” and marketed as something different. From your question I presume the the existing crowns that you have are part of your smile and would be involved with the changes that you wish to your smile. Whether it is a good idea to do this is another matter as explained below:

1. Cost – You are unlikely to cave money in veneering your crowns as veneering an existing crown or replacing that crown completely is usually about the same cost.

2. Aesthetics – due to the transparency of the veneers the underlying substructure may show through- this is usually metal and would produce a grey tooth.

3. Bonding – sometimes he underlying substructure is zirconium. At present it is impossible for us to bond to this.

As you can see what at first seems an obvious solution has some draw backs. Often it is better in the long run to take the simplest solution- replacing your existing crowns and what ever else treatment might be desirable – whitening, braces, veneers, crowns etc.

Hope this helps.

Regards,