Abstract: Abstract：Objective To evaluate the effect of Al2O3 sandblasting of different size particles on zirconia ceramic surface and Er∶YAG laser on dentin surface on the bonding strength of resin. Methods A total of 25 complete isolated human premolars were chosen and were cut into 50 pieces exposed dentin at Shanxi Medical University Stomatology Hospital from February 2011 to October 2011，of which 10 with 35% phosphoric acid etching，Er∶YAG laser etching processing the remaining 40. Fifty zirconia ceramic sheet were made，20 of them were not be processed，while the remaining 30（10 in each group）were sandblasted with 120，80，40 μm Al2O3 particles at 0.4 MPa for 20 s. The specimens were divided into five groups（n = 10）：in group A and group B，35% phosphoric acid etching tooth blocks and Er∶YAG laser etching tooth block were bonded with no-treatment ceramic plates. In group C，D and E，the ceramic plates sandblasted with 120，80，40 μm particle size Al2O3 particles were bonded with Er∶YAG laser etching dental block. Each group was tested bond strength. Results Bond strength of group A［（8.71 ± 0.86）MPa］ was lower than group B ［（10.94 ± 0.93）MPa］，and the difference was statistically significant（P < 0.01）. Bond strength of group C，D and E ［（13.49 ± 1.53），（13.97 ± 0.83），（17.11 ± 1.51）MPa］was higher than group B and the difference was statistically significant（P < 0.01）；group C and D were lower than group E and the difference was statistically significant（P < 0.01）；group C and D showed no significant difference（P > 0.05）. Conclusion Al2O3 particles sandblasting on on zirconia ceramic surface and Er∶YAG laser on dentin surface is an effective method to increase the bond strength of zirconia ceramic and dentin.

Key words: Er∶YAG laser, shear strength, sandblast, zirconia, dentin

摘要： 目的 探讨氧化锆陶瓷表面不同粒径Al2O3颗粒喷砂及牙本质表面Er∶YAG激光处理对树脂黏结强度的影响。方法 2011年2—10月在山西医科大学口腔医院选取25颗完整人前磨牙，制作50个牙块，暴露牙本质。其中10个牙块表面用35%磷酸酸蚀处理，40个牙块表面用Er∶YAG激光蚀刻处理。制作氧化锆陶瓷片50个，20个不做处理，其余30个（每组10个）在0.4 MPa压力下分别接受120、80、40 μm粒径Al2O3颗粒喷砂20 s 。试件分为5组（每组10个）：A、B组分别由35%磷酸酸蚀和Er∶YAG激光蚀刻的牙块与未做处理的陶瓷片黏结；C、D和E组分别由120、80、40 μm粒径Al2O3颗粒喷砂的陶瓷片与Er∶YAG激光蚀刻的牙块黏结。各组分别进行黏结强度测试。结果 A组的黏结强度［（8.71 ± 0.86）MPa］低于B组［（10.94 ± 0.93）MPa］，两组差异有统计学意义（P < 0.05）；C、D和E组的黏结强度 ［（13.49 ± 1.53）、（13.97 ± 0.83）、（17.11 ± 1.51）MPa］均高于B组，差异有统计学意义（P < 0.01）；C、D组的黏结强度低于E组，差异有统计学意义（P < 0.01）；但C与D组间差异无统计学意义（P > 0.05）。结论 氧化锆陶瓷片表面Al2O3颗粒喷砂和牙本质表面Er∶YAG激光蚀刻处理可增加氧化锆陶瓷与牙本质间的树脂黏结强度。

关键词: Er∶YAG激光, 剪切强度, 喷砂, 氧化锆, 牙本质