Abstract: Objective To evaluate the clinical effects of zirconia ceramic post on the restoration of large defects of anterior teeth. Methods A total of 200 anterior teeth with large-area defects were randomly selected after sound root canal treatment and divided into 2 groups (each contains 100 cases). Teeth in the experimental group were restored with zirconia ceramic post in combination with composite resin, while those in the control group received the restoration of glass fiber post and composite resin. All the cases were regularly followed up to evaluate the clinical effects. Results After two years of follow-up, 94 cases in experimental group were successful, while 6 cases failed. Meanwhile, 72 cases in the control group were successful and 28 cases failed. Significant difference was detected between the experimental group (94%) and control group (72%, P<0.01). The failure rate of zirconia ceramic post was significantly lower than the glass fiber post according to the occurrence rate of the post fracture, restoration fall-off and gingival edge defect (P<0.05). No significant difference was detected in terms of the part loss of resin(P>0.05). Neither root fracture nor luxated abutment was observed in the two groups (P>0.05). Conclusion During the treatment of anterior teeth with large defects, the zirconia ceramic post is superior to glass fiber post. The former has a higher success rate and fewer complications which is worth of further clinical application.

Key words: zirconia ceramic post, large defects