DANB General Chairside Practice Test

Which are the supporting structures of a three-unit bridge?

1. Abutments

2. Pontic

3. Temporary crowns

4. Dental implants

The correct answer is: Abutments

In the context of a three-unit bridge, the supporting structures are abutments. Abutments are the teeth or dental implants located at each end of the bridge that provide stability and support for the prosthetic tooth (the pontic) that fills the gap created by a missing tooth. The abutments are typically natural teeth that have been prepared to receive crowns, or they can be dental implants placed to support the bridge. The role of the abutments is crucial, as they bear the load and help distribute the forces generated during chewing across the bridge, ensuring its longevity and proper function. Understanding this concept is essential, as it highlights the importance of having healthy, well-cared-for abutment teeth to maintain the integrity of the bridge. Dental professionals focus on the condition of these supporting structures to ensure successful outcomes for patients receiving bridges.