A three-unit bridge that replaces one missing tooth consists of:

• A. three pontics
• B. two abutments
• C. two abutments and pontic
• D. one abutment and two pontics

Answer: (C)

In a three-unit bridge that replaces one missing tooth, the structure is comprised of two abutments and one pontic. The abutments are the teeth on either side of the missing tooth, which provide the necessary support for the bridge by anchoring it in place. The pontic is the artificial tooth that fills the gap of the missing tooth.

This configuration is important for ensuring the stability and functionality of the bridge. The abutments bear the load and distribute forces during chewing, while the pontic serves the aesthetic and functional purpose of replacing the missing tooth.

Understanding this structure is crucial in dentistry, as it helps in planning restorative procedures and ensures that patients receive effective care for their missing teeth.