How to choose a bridge abutment

Abutment teeth should have sufficient clinical length, relatively normal tissue structure and larger volume to ensure good retention of fixed dentures.

1. Ante’s rule: the area of the periodontal ligament of the abutment is greater than or equal to the sum of the area of the periodontal ligament of the missing teeth.

2. Crown to root ratio: ideally 2:3, at least 1:1.

3. The shape and structure of the root: the root is long and thick, and the relative support force is better if the root interval is large.

4. The inclination and displacement of the abutment: the inclination of the abutment generally does not exceed 25 degrees.