Abstract: Abstract: Objective To evaluate the survival rates of the restorations for wedge-shaped defect with Dream Color nanometer resin and Fuji Ⅱ resin-reinforced glass ionomer. Methods 200 patients with 479 wedge-shaped defect teeth were selected and randomly divided into two groups. 105 patients with 246 defect teeth were treated with Fuji Ⅱ resin reinforced glass ionomer(glass group),and the other 95 patients with 233 defect teeth were treated with Dream Color nanometer resin (resin group). All the patients were recalled to evaluate the restoration efficacy two years later. Results 183 patients(with 446 teeth) were evaluated two years after restoration. The total failure rate，completely broken rate and secondary to pulpitis rate in the Glass group were significantly lower than those in the Resin group (for all the three kinds of rates,p<0.05); the edge broken rate of the glass group was significantly higher than that of the resin group (p<0.05).Conclusion Dream Color nanometer resin and resin reinforced glass ionomer have their own advantages for wedge-shaped defect repair. The former is better for patients with high aesthetic requirements or poor toothbrushing habits, while the latter has benefits for protecting dental pulp.