Bridges are natural-looking tooth replacements which help maintain facial structure, reduce stress on the jaw and fill in the gaps caused by missing teeth. Fixed bridges are cemented to the existing teeth and do not come out. Removable bridges can be taken out and cleaned at home. Crowns are used to strengthen and improve the shape, size or color of teeth. They can support broken or weak teeth or those with large fillings; provide a smooth, strong, attractively contoured surface for stained, misshapen or otherwise abnormal teeth; and aid in the implantation of bridges and other implants.