*3.5.1 Anterior teeth*

Retention is mainly two types.


Retention of the post is affected by preparation geometry, post length, post diameter, surface texture and luting agent.

**Preparation geometry**: Taper should be restricted to 6 degrees or nearly parallel walls should be attained. Under cuts should be removed

**Studies reveal** that threaded posts are most retentive of all provided the post fits the canal properly.

