Objective:To explore the clinical effect of different removing excess resin adhesive treatment on endocrowns of short crown molars.Methods:70 short crown molars from 69 patients meeting the inclusion criteria were selected as the research subjects and divided into two groups according to different intervention methods.The A group was exposed to light for 2 seconds,scraped off with sickle scalpel,and then illuminated for 40 seconds.In B group,a large amount of excess resin adhesive was removed with a small brush,and then the light was illuminated for 40 seconds after the endocrown bonding.The operation time were recorded and compared between the two groups.The effects of two postoperative treatment methods at 1 week,3 months,6 months,and 12 months on marginal staining,the secondary caries,the marginal adaptation,retention,abutment loosening or fracture were compared.And the gingival sulcular bleed-ing index(SBI)index of the two groups were evaluated at before repairing,1 week,3 months,6 months,12 months after repairing.Re-sults:In 12 months,the success rate of two groups of endocrowns was above94%.12 months after surgery,there were2 cases of failure in group A and 1 case of failure in group B.There was no significant difference between the two groups in marginal staining,the second-ary caries,the marginal adaptation,retention,abutment loosening or fracture at 1 week,3 months,6 months,and 12 months after surgery(P>0.05).There were no significant differences in SBI at 1 week,3 months,6 months and 12 months after repairing(P>0.05).There was no statistically significant difference in the operation time between the two groups(P>0.05).Conclusion:Ideal effects are achieved for the two removing excess resin adhesive treatment on endocrowns of short crown molars.