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.
1 It would be reasonable to expect that a dental crown could last between five and fifteen years. 2  Many dental insurance plans stipulate that they'll only pay for replacement crowns after the previous one has provided at least 5 years of service.