不同剂型玻璃离子水门汀对牙本质粘结剪切强度的比较

目的:比较不同剂型玻璃离子水门汀对牙本质粘结剪切强度,为临床使用提供参考。方法:临床收集新鲜拔除的磨牙30个,用慢速精密齿科片切机切取颊面浅层牙本质薄片(片厚2 mm),自凝塑料包埋,仅暴露颊侧浅层面作为粘结面,流水冲洗4 s,无油气体吹干,于每个试件的粘结面上固定一直径4 mm,高2 mm成型管。然后将30个试件随机分为3组(每组10个),分别使用RelyXTM Luting Cement(粉液剂型)、GC Fuji PLUS(粉液剂型)和GC Fuji CEM(双糊剂型)3种玻璃离子水门汀进行充填,制作粘结试件后,试件置于盛有人工唾液的容器中37℃24 h,用万能测试机测定每个试件的粘结剪切强度。结果:3种玻璃离子水门汀的粘结剪切强度由底到高分别为:RelyXTM Luting Cement(粉液剂型)(6.163±1.177)MPa、GC Fuji PLUS(粉液剂型)(8.004±0.962)MPa、GC Fuji CEM(双糊剂型)(10.31±0.893)MPa,三者间差异有统计学意义(P<0.05)。结论:双糊剂型玻璃离子水门汀抗粘结剪切强度明显高于两种粉液剂型玻璃离子水门汀,是临床修复治疗的良好选择。

Comparison of shear bond strength of different glass ionomer cements

AIM:To compare the shear bond strength of different glass ionomer cements.METHODS:Thirty freshly extracted human premolars were divided randomly into 3 groups.The bonding surfaces were rinsed with tap water and dried with non-oil gas,then they were bonded with RelyXTM Luting Cement,GC Fuji PLUS and GC Fuji CEM respectively.The shear bond strength was tested after 24 hours.RESULTS:The shear bond strength was(6.163±1.177)MPa,(8.004±0.962)MPa and(10.31±0.893)MPa in RelyXTM Luting Cement,GC Fuji PLUS and GC Fuji CEM groups,respectively.There was statistically significant difference between group GC Fuji PLUS and GC Fuji CEM(P<0.05).There was statistically significant difference between group RelyXTM Luting Cement and GC Fuji CEM(P<0.05).CONCLUSION: The paste-paste style cement is the best choice for filling and adhesion because of its higher shear bond strength.