New discoveries have found exceptions to Mendel's basic laws, but none of Mendel's things have been proven to be flat-out wrong. Hail to the Father of Genetics ! The name is ma-ma-ma-ma-ma-Mendel.
Dental crowns should last on average from 10 to 20 years. Crowns are still subject to fracture and cavities, so it is important to take extra care in brushing and flossing around crowned teeth to prevent them from needing replacement too often.
Clinical testing has proven that a Lumineers smile lasts and looks great for over 20 years. The Lumineers process takes only 2 visits to your dentist and the placement of Lumineers on the second visit takes, on average, only about one hour. On the first visit, your dentist will create a precise mold. Then you and your dentist will determine the shade of white that is right for you.