目的：探究不同喷砂压力、喷砂时间以及喷砂氧化铝颗粒大小对牙科氧化锆与间接修复树脂界面剪切强度的影响。方法250个氧化锆试件根据不同的喷砂压力、喷砂时间及喷砂氧化铝颗粒大小随机分成25组，对照组氧化锆不接受表面喷砂。使用万用试验机对每一组氧化锆试件与间接修复树脂界面的剪切强度进行测量并比较。并观察断面断裂模式。结果随着喷砂时间、喷砂颗粒尺寸增加，氧化锆与间接修复树脂界面剪切强度随着增加（P＜0．001；P＜0．001）。喷砂压力由0．1 MPa增加至0．2 MPa时，界面剪切强度增加（ P＝0．036），当喷砂压力由0．2 MPa增加至0．4 MPa或0．4 MPa增加至0．6 MPa，界面剪切强度未有显著变化（ P＝0．609；P＝0．689）。 C型断裂模式随着剪切强度增加出现概率也增加。结论在牙科领域氧化锆与间接修复树脂粘结中采用21 s、0．2 MPa及110μm的喷砂条件最为适合。%Objective To evaluate the effect of sandblasting conditions including sandblasting time, sandblasting pressure and sand⁃blasting alumina powder size on shear bond strength between zirconia core and veneer indirect composite resin. Methods 250 zirconia bars were randomly divided into 25 groups according to different sandblasting conditions. The control group did not receive sandblasting. Shear bond strengths between zirconia and indirect composite resin were measured and compared for each group using universal testing machine. Also, fracture mode of each group was observed. Results The shear bond strength significantly increased as the size of alu⁃mina powder and sandblasting time increased (P<0.001;P<0.001). The shear bond strength significantly increased from 0.1 MPa to 0.2 MPa ( P=0.036) and did not significantly change with a sandblasting pressure from 0.2 MPa to 0.4 MPa ( P=0.609) or from 0.4 MPa to 0.6 MPa ( P=0.689) . The possibilities of the fracture mode type C were higher as the bonding strength increased. Conclusion A sandblasting condition of 21 s, 0.2 MPa, and 110 μm is recommended for dental application to improve the bonding between zir⁃conia and indirect composite resin.
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