The procedure for a dental crown involves the preparation of tooth by a dentist and then takes an impression of the teeth then the impression is sent to the lab to fabricate a custom-made crown. They can be made from different materials, traditionally it was made with gold but due to poor esthetics and high gold cost. Another old method is PFM, a porcelain fused metal crown. They can be useful when there is not enough room to fit the crown. At my family dentist Irving, we mainly do all-ceramic crown which is made out of zirconia. They are very strong and aesthetically pleasing molar teeth. For anterior teeth, with the more aesthetically demanding area, e-max or another all-ceramic crown may be used.
Dental bridges are 2 or more crowns that are connected. Usually, a bridge is used to camouflage the gap created by one or more missing teeth. The crowns of missing teeth are held by adjacent abutment teeth. If your abutment teeth also need crowns, an implant is contraindicated (due to health, significant bone loss) bridge can be a good choice to replace missing teeth.