Crown is the process applied to cap and to encircle a tooth, which is deformed because of decay, damage or some other reason.
The bridge is used to replace a missing tooth (or several teeth) by joining an artificial tooth permanently to adjacent teeth.
These are fixed prosthesis. The classical fixed prosthesis and methods applied until today benefited from the durability of the metals, used as the infrastructure and the aesthetics of the ceramics, as the superstructure.
Although this method is still being used, different fixed prosthesis applications that imitate the natural appearance by the use of many other materials and technology and that fulfill the aesthetic needs, are also popular.
When a tooth loss occurs for any reason, the adjacent teeth begin to move towards this gap. Hence, there are gum problems in the adjacent teeth such as bone loss due to towards to this gap, aesthetic deterioration, and alterations in chewing forces. If this gap is not restored for a long time with a bridge or an implant, there may be also a loss in the adjacent teeth.