To propose a warranty of 5 years or any amount of time for crowns and bridges is ludicrous. You simply cant paint with such a broad brush in matters relating to dentistry. There are countless factors involved in the success and failure of any restoration, both known and unknown; several studies in the scientific community confirm this.

Would you also have a surgeon warranty that a cancer will not come back after its removal for a specified amount of time? Anytime you are dealing with the human body and a persons individual genetic and behavioral makeup you can't reasonably expect to warranty anything. The human body is not a toaster oven.

Any dentist who does not take his or her craft seriously enough and do all he can to provide quality work that HE or SHE expects to last as long as humanly possible, will be weeded out by both the market place and/or the board of dentistry. Any dentist with a conscience would realize a manufacturing flaw that would lead to breakage, etc. and do the right thing. There is no need for a warranty as that will only create more red tape and more headaches for those who strive to do their best every day they practice dentistry.