Re: Any one have multiple crowns on molar teeth?
If you are really concerned with how long the crown will last, like Jennifer said, your oral hygiene is key. The best choice and longest lasting type of crown is gold. Porcelain can chip and also cause wear to opposing teeth. Gold is most hygienic meaning it will attract less plaque than porcelain. Also, gold is most "tissue friendly", as many people have metal allergies. Often times a filling will come out of the tooth after it's been prepared for the crown, whether it be during the impression for the lab or for making a temporary crown, without sufficient tooth structure the fillings may not stay put.
The tooth has to be drilled to remove enamel for the crown to fit onto it. The same goes for any filling material that is the outside of the tooth (replacing where enamel was). So basically the entire outside of the tooth is removed, an impression of that is taken and sent off to have the crown made at a dental laboratory. This takes time. A temporary acrylic crown is temporarily cemented on in the meantime.