I had eight Lumineers applied to my front top teeth 2 yrs. and 4 months ago.
My dentist did advise me to wear my bite guard every night to avoid the possibility of a Lumineer popping off during nighttime teeth grinding. Otherwise, I was told that I could eat anything. However, while eating a piece of hard candy several days ago, a piece of a Lumineer chipped off. Now my dentist says that I should not be eating hard candy or crunching ice cubes.
I had not realized that these porcelain covers were fragile, but am now thinking this is the case. Although the Lumineers advertisement indicates that clinical studies show them lasting 20 years, I will frankly be amazed if they last 10 years. Several of my front teeth had become quite thin at the bottom and the Lumineers have corrected this problem, as well as covered a discolored front tooth which had died. Thankfully my dentist will be replacing the chipped Lumineer at no charge