Clinical Observation Of Cast Post And Core In Restorating Large Area Defects Of Tooth

Objective To investigate the clinical effect of cast post and core on the restoration of large area defects of tooth. Methods Seventy-six teeth with large area defects were treated with root canal therapy. After tooth and canal preparation, they were restored by cast post and core with direct method. First, made the wax pattern ,then casted the cast post and core. After the intra-oral adjustment, cemented the cast post and core in the root canal. then prepared regularly, made the impressions and hard stone models, sent them to make the metal crown and porcelain fused to metal crown. last, adjusted and cemented the crown. The restoration effect was evaluated after 6 to 37months.Results During the clinical investigating case, seventy-four restorations were successful, except one root fracture case and one falling cases, the successful rate of the restoration was 97.37%.We had observed no significant differences among incisor,cuspid,premolars and molars, and also in different times after the restoration. The effect of the restoration had no statistical variation between the single cast post core restored and as the abutment for fixed or removerable denture. Conclusion The cast post and core can tightly connect with the remaining tooth tissue and root canal, fill the large area defects of tooth tissue, and provide better retention and the anti-fracture ability for the crown. so it is an ideal technique for restoration of large area defects of tooth.