This proposal assumes that crowns are commodities like televisions, automobiles or computers. We all know that the success of any medical treatment involves the participation of the patient in this process. As medical professionals, it is our responsibility to educate patients and guide them in showing how their actions can contribute to the success of our treatment. Furthermore, it is our responsibility to provide patients with treatment that follows standard of care. It is also the patient's responsibility to properly follow our instructions in maintaining his/her oral health. 

We should have flexibility in dealing with unsuccessful treatment. There are already regulations in place that address failures due to not following standard of care. We should not be burdened by additional inflexible regulations. Should cardiac surgeons warranty bypass surgeries (what if a patient continues to smoke...)? Should plastic surgeons warranty facelifts (what if a patient continues to sunbathe everyday...)?

In conclusion, do not treat crowns as consumer commodities. Thank you.