Abstract: Purpose : To Compare the clinical effect with two methods of repairing the flared root canals, semi-precious metal cast post core restoration and fiber post combined with accessory post resin core restoration. Methods: Choosing 68 flared root canal cases in clinic in the period from May 2012 to May 2013, 32 of them are repaired by semi-precious metal cast post core, and the rest are repaired by fiber post combined with accessory post resin core, compare the clinical effect in the next and second year. Results: The clinical survival of semi-precious metal cast post core is 87.5%,and the clinical survival of fiber post combined with accessory post resin core is 100%. The clinical effect of two methods has different (P<0.05). Conclusion: The clinical effect of repairing flared root canals by fiber post combined with accessory post resin core is better than by semi-precious metal cast post core.

Key words: fiber post combined with accessory post, cast post core, flared root canals