This type of bridge has been the most popular for the last 40 years. It is tooth colored and the metal is hidden. The metal reinforces the porcelain making it stronger. The success rate of bridges is about 70% after 15 years. The lesser the number of units (shorter bridge) the greater the success rate. Different quality of metals can be used with the porcelain: precious, semiprecious and nonprecious. Precious bonds the best with porcelain. Delmarva Dental Services has been using precious metal in their porcelain fused to metal bridges since 1981.
The advantages of this type of bridge are its low fracture rate, high retention rate, low wear rate, years of proven success, and relative esthetics. Most dental laboratories are well versed in its fabrication.
The disadvantages are the wear of the natural teeth that oppose the bridge. It also requires the reduction of the adjacent teeth by 2 millimeters.