Influence of post material on the fracture resistance of endodontically treated teeth: a laboratory study.

Objectives: This laboratory study compared the effects of various post systems on the fracture resistance of endodontically treated mandibular premolars.

Method And Materials: Thirty-two extracted mandibular first premolars were collected, endodontically treated, and assigned into four test groups (n = 8). The classification was based on the post material as follows: traditional glass-fiber posts (TFP), traditional titanium posts (TTP), coated glass-fiber posts (CFP), and coated titanium posts (CTP).