A Three Unit Dental Bridge consists of the following components:
Retainer: A crown i.e. used as part of fixed partial denture for retention and support from abutment tooth is called a Retainer.
Abutment: It is any tooth, root or implant, which gives attachment and support to fixed partial denture.
Pontic: Pontic is the artificial tooth that replaces a missing tooth in a fixed partial denture. Pontics are attached to retainers. All the forces acting on the pontic are transferred to abutment through the retainers.
Connector: It is the connection that exists between the pontic and retainer. They may be rigid or non rigid.