Objective    To study the effect of CEREC CAD/CAM ceramic inlay on repair of wedge-shaped defects of teeth and test its anti-fracture properties.     Methods    Extracted teeth were divided into control group (n=16) and experimental group (n=16)

and prepared into imitating teeth with wedge-shaped defects. Teeth in experimental and control groups were repaired with CEREC CAD/CAM ceramic inlay and light-cured composite resin

respectively. Anti-fracture strength of teeth with wedge-shaped defects repaired with CEREC CAD/CAM was assayed on a universal testing device with its maximal loading recorded. The antifracture strength was compared between the 2 groups.     Results    The anti-fracture strength of teeth with wedge-shaped defects repaired with CEREC CAD/CAM ceramic inlay was significantly higher in experimental group than in control group (3.56±0.27 vs 2.43±0.15

P＜0.01).     Conclusion    CEREC CAD/CAM ceramic inlay can effectively repair wedge-shaped defects of teeth.