Fracture resistance of endodontically treated teeth with different direct corono-radicular restoration methods.

Background: Endodontically treated teeth are widely considered to be more susceptible to fracture than vital teeth. Obturation procedures and post placement have been a main cause of vertical root fracture.

Material And Methods: Forty-eight human premolars with standardized weakened roots were endodontically treated and allocated to four experimental groups (n=12).