Crowns can last 40 years or more with proper care?

With good occlusion: With good occlusion, the crown should last. Today, crown are judged not just how long it lasts but more of esthetic and wear to the opposing dentition. With the advance of new ceramic (lithium disillicate) which gives you an optimal and similar degree of hardness and wear to enamel, the use of metal substructure is eliminated. With a good bonding system, all ceramic crown is the best treatment.

Depends: Crown life is dependent on so many things. One, your dds has to make the margin or junction between the tooth and crown as perfect as he can. Then the rest is your job. It has to been brushed and flossed even better than the original tooth because of the micro junction that exists on every crown where they butt together. Assuming quality is great the rest is up to you.

Perhaps: Everything is variable. Good care and frequent regular visits up dentist van help prolong crown life. Stay away from jawbreakers. :).

Absolutely!: While the life span of a crown done by an average dentist on an average pt. Is 8 years: an excellent dentist with an exact fitting crown, cement/ bonded with a quality luting agent, carefully adjusted into a proper bite, floss daily (without skipping days) and rechecked periodically can, with an excellent compliant patient, last forty years. I know my crown has lasted since 1968... 43 years!i.

Yes : The crown can last a lifetime. The real question how long will tooth under the crown remain healthy. Most cases for need to replace crowns is recurrent decay under a crown. If the fit is ideal, and home care is perfected, and no trauma is applied to the crown, it can last a lifetime.

Variables: Your hygiene, diet, bruxism, bite/occlusion, routine professional maintenance, your mouth ph/ load of cariogenic bacteria in your mouth, all play important roles to longevity of crowns... Also, how much tooth structure was left (prep of the tooth) inside the crown is important, too.

Possibly...: ... but your expectations may be a bit high. Dental restorations can be considered durable goods, reasonable expected to last a good amount of time, but not last a lifetime. Cars, televisions, refrigerators, and the like can last many years, but there comes a point where they break and need to be replaced. Proper care will increase longevity but not guarantee a lifetime of use.

Hopefully???: With proper dental care, the crowned tooth should last as long as the natural teeth- consistent dental visits for exams and cleanings and diligent home care.

Crown Life: Yes. A well done crown should not have a life span. I've seen patients that have had crowns and bridgework last their entire lifetimes.

At least five years: Many last much longer, though. It also depends on how well you take care of it and proper oral hygiene.

Perhaps: Average life span of a crown is about 8 years. That means some fail in a short time, some last decades. Life span determined by oral hygiene, integrity of your dentition, quality of your occlusion, diet, amount of tooth material to support crown, etc.

YES: YES....I have seen many that are older than that.