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.
If properly maintained with enough brushing and flossing, the implant can last a lifetime A crown, however, is rated to last about 10 to 15 years before normal wear can cause the tooth to require replacement, though excellent dental hygiene could extend the life beyond 15 years.