Abstract:Objective: To evaluate the clinical effect of glass fiber post combined with composite resin restoration on endodontically treated premolars with wedge-shaped defects. Methods: One hundred and twenty-six premolars in 126 patients with severe wedge-shaped defects were randomly divided into three groups after root canal therapy. Forty-two teeth in group A were restored with glass fiber post combined with composite resin. Forty-two teeth in group B were restored with metal post-core and ceramic crown. Another 42 teeth in group C were restored with composite resin alone. Clinical effects were evaluated one year later. Statistical analysis was performed with SPSS18.0 software package. Results: The results of this study showed that there was no significant difference in the success rate between group A and group B (P>0.05). There was significant difference in the success rate between group A and group C (P<0.05). The patients in the group of glass fiber post got the most satisfaction. Conclusion: The clinical effect of glass fiber post combined with composite resin restoration on premolars with wedge-shaped defects is preferable and should be widely used.