[The prefabricated post and composite resin core technique used in restoring residual crown of posterior tooth].

Purpose: To investigate the clinical effect of repairing posterior residual crown using titanium alloy post combined with composite resin core technique.

Methods: Twenty-one patients (26 residual crown) with perfect root canal therapy were selected. Modern bonding technique was used to build up the core with titanium alloy post and flow composite resin together for crown restoration.

Results: After ten years of clinical observation, only 4 cases among the 21 patients failed in restoration. The rate of success was 85%. X-ray showed that the periapical alveolar bone density was enhanced after restoration.

Conclusions: Standard root canal therapy and effective post-core strengthening can restore the function of the residual crown and retain the tooth.