The therapeutic effect difference in single post-core-crown and combined crown applied to restoration for residual root of premolar teeth

Objective To find out the therapeutic effects of single post-core-crown and combined crown applied to restoration for residual root of premolar teeth,select high quality repair method for residual root restoration of premolar teeth,and provide analytical basis for clinical practice.Methods 176 premolar residual root patients treated in our department were divided into single crown group and combined crown group,the residual roots were repaired by single post-core-crown and combined crown,therapeutic effects were observed by follow-up and were comparative analysised.Results All patients were followed up for 2 to 4 years after the repair.The repair success rate of single crown group was 82.8%(77/93);combined crown group was 93.5%(101/108).There was a significant difference in the two groups(P0.05).Conclusions The success rate of combined crown group was significantly higher than single crown group,worthy of further clinical application.Before restoration its clinical indications must be strictly holded,and a higher success rate was conducive to obtained.