An Implant-supported bridge is a dental prosthesis supported by one or more implants replacing three or more teeth.
Implant-supported fixed partial denture or dental bridge as commonly known can be either screw retained or cemented.
Screw-retained prosthesis allows for removal of the bridge if needed. Cemented bridge cannot be removed as it is on permanently.

External links

Educational Resources

• OsseoNews.com A discussion about implant-supported bridges.