两种老化方式对玻璃陶瓷与牙本质粘接界面的影响  

Effect of two aging methods on the bonding interface between glass ceramics and dentin

作　　者：吴政西 李风兰[2] WU Zhengxi;LI Fenglan(Shanxi Medical University School and Hospital of Stomatology,Taiyuan 030012,China;Department of Prosthodontics,Affiliated People's Hospital,Shanxi Medical University,Taiyuan 030012,China)

机构地区：[1]山西医科大学口腔医学院·口腔医院,山西太原030012 [2]山西医科大学附属省人民医院口腔修复科,山西太原030012

出　　处：《口腔疾病防治》2019年第11期703-710,共8页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：山西省重点研发计划（指南）项目（201703D321027-2）

摘　　要：目的研究3种树脂水门汀粘接牙本质与玻璃陶瓷时,细菌侵袭和人工唾液浸泡两种老化方式对粘接界面粘接强度及纳米渗漏的影响,为临床选择粘接材料提供参考。方法选取108个牙本质块,分别用Variolink N、Multilink N、RelyX Unicem 3种树脂水门汀粘接剂与玻璃陶瓷瓷块制备粘接试件。每种粘接剂的粘接试件按照不同老化方式分3组:细菌侵袭组(接种变异链球菌后厌氧培养14 d),人工唾液组(人工唾液浸泡6个月),对照为即刻测试组,每组12个试件;每组随机选取6个试件测试粘接强度,6个试件扫描电镜观察界面纳米渗漏情况。结果即刻测试组Variolink N的粘接强度明显高于Multilink N和RelyX Unicem的粘接强度,差异具有统计学意义(P<0.05);但在人工唾液组和细菌侵袭组3种粘接剂之间的粘接强度差异均无统计学意义(P>0.05)。细菌侵袭组,3种粘接剂纳米渗漏差异有统计学意义(P<0.05),且Variolink N>Multilink N>RelyX Unicem,两两比较差异均具有统计学意义(P<0.05)。3种树脂粘接剂的纳米渗漏在细菌侵袭组、人工唾液组较即刻测试组均呈增加趋势。结论人工唾液浸泡和细菌侵袭这两种老化方式均可不同程度降低3种树脂水门汀的粘接界面封闭性能。口腔中变异链球菌的存在可能会降低树脂牙本质粘接界面的封闭性能。Objective To study the effects of bacterial invasion and artificial saliva immersion on the bond strength and nanoleakage between healthy dentin and glass ceramics-bonded specimens using three types of resin cements and provide a reference for the selection of clinical bonding materials.Methods One hundred eight dentin blocks were selected to prepare bonded specimens with Variolink N,Multilink N,RelyX Unicem and glass ceramics blocks.The adhesive specimens of each type of resin cements were divided into three groups according to the aging method:bacterial invasiveness group(the specimens were cultured under anaerobic conditions for 14 days after inoculation with Streptococcus mutans),artificial saliva immersion group(the specimens were immersed in artificial saliva for 6 months),and control group(the immediate test group).Each group comprised 12 specimens:6 were selected to test the bonding strength,and 6 were observed by scanning field emission scanning electron microscopy(FESEM).Results The bond strength of Variolink N in the immediate test group was significantly higher than that of Multilink N and RelyX Unicem,and the difference was statistically significant(P<0.05).However,no significant difference was found in the bacterial invasiveness group and artificial saliva immersion group(P>0.05).In the bacterial invasion group,the difference in the nanoleakage of the three adhesives was statistically significant(P<0.05),with a trend of Variolink N>Multilink N>RelyX Unicem,and pairwise comparison was statistically significant(P<0.05).The nanoleakage of the three resin adhesives showed an increasing trend in the bacterial invasion group and artificial saliva group compared with that of the immediate test group.Conclusion Both artificial saliva soaking and bacterial invasion can reduce the sealing property of the adhesive interface of 3 types of resin cements to different degrees.The presence of Streptococcus mutans in the oral cavity may reduce the sealing performance of the resin dentine adhesive interface.

关 键 词：人工唾液 变异链球菌 玻璃陶瓷 牙本质 树脂水门汀 粘接界面 老化 纳米渗漏 

分 类 号：R783.4[医药卫生—口腔医学]