Dental bridges literally bridge the space created by one or more missing teeth. Spaces left by missing teeth can cause discomfort when chewing and eventually cause the remaining teeth to shift into the empty spaces. This shifting can result in an altered occlusion (how the teeth come together), which may lead to temporomandibular joint (TMJ) disorder. A bridge is made up of two crowns for the teeth on either side of the space and a fused crown in the space, preventing further shift of the teeth and restoring lost chewing function. Dental bridges can be supported by natural teeth or implants.