What is a Bridge?

If you’re missing one or more teeth, you may notice a difference in chewing and speaking. Bridges can help restore your smile.
Sometimes called a fixed partial denture, a bridge replaces missing teeth with artificial teeth and literally “bridges” the gap where one or more teeth used to be. Bridges can be made from gold, alloys, porcelain or a combination of these materials and are attached to surrounding teeth for support. Unlike a removable bridge, which you can take out and clean, a fixed bridge can only be removed by a dentist.
An implant bridge attaches artificial teeth directly to the jaw or under the gum tissue. Depending on which type of bridge your dentist recommends, its success depends on the foundation. So it’s very important to keep your remaining teeth healthy and strong.

This article taken from: http://www.mouthhealthy.org/en/az-topics/b/bridges.aspx