This part of dentistry covers the tooth replacement techniques. Missing teeth used to be replaced not too long ago with 3 unit porcelain fused to metal bridges. The adjacent teeth to the space were filed and capped. Nowadays we can replace these restorations with all porcelain bridges which havee the same strength but much higher esthetic value. (Cannot be used for all cases). The adjacent teeth next to the missing tooth also benefit a great deal since they don't have to be shaved. They only need to have a conservative preparation in the mid section of the tooth to accommodate the supporting wings/inlays.