硅涂层对牙科氧化铝陶瓷与树脂粘结强度的影响  

Effect of nano-silica coating prepared by different concentration silica sol on shear bond strength of alumina ceramic

作　　者：王瑜[1] 章非敏[2] 谢海峰[1] 

机构地区：[1]南京医科大学口腔医学研究所,210029 [2]南京医科大学口腔医学院修复科,210029

出　　处：《中华口腔医学杂志》2007年第12期754-757,共4页Chinese Journal of Stomatology

基　　金：江苏省自然科学基金(BK2006174)

摘　　要：目的探讨在牙科氧化销陶瓷表面进行 SiO_2水溶胶涂层对陶瓷与树脂粘结强度的影响。方法 32个氧化铝陶瓷试件根据计算机产生的伪随机数字表分为4组,每组8个,采用溶胶-凝胶法在试件表面分别进行20%SiO_2水溶胶涂层+硅烷偶联剂(A 组)、30%SiO_2水溶胶涂层+硅烷偶联剂(B 组)、40%溶胶涂层+硅烷偶联剂(C 组)和硅烷偶联剂(对照组)处理,应用傅立叶红外光谱、扫描电镜、X 射线能谱仪进行分析。制作陶瓷-复合树脂粘结体,剪切法测试各组剪切粘结强度。结果溶胶-凝胶法可在氧化铝陶瓷试件表面制得纳米硅涂层。热处理后 A、B、C 3组试件 Si-O-Si 反对称伸缩振动吸收峰、对称伸缩振动吸收峰、弯曲振动吸收峰均增强;扫描电镜显示纳米氧化硅粒子分布较均匀,局部粒子产生团聚;试件表面硅元素含量均明显增加。A、B、C 组试件与树脂的剪切粘结强度分别为(3.196±0.171)MPa、(4.852±0.178)MPa、(3.576±0.671)MPa,与对照组[(1.881±0.156)MPa]相比,差异均有统计学意义(P<0.05);B 组的剪切粘结强度与 A、C 组相比,差异有统计学意义(P<0.05)。结论 3种浓度硅溶胶可在牙科氧化铝陶瓷表而制得纳米硅涂层。纳米硅涂层可显著提高氧化铝陶瓷与树脂的剪切粘结强度。其中30%浓度 SiO_2水溶胶制备的硅涂层提高剪切粘结强度的效果最明显。Objective To evaluate the effect of nano-silica coating prepared by different concentration silica sol on shear bond strength between alumina ceramic and resin cement. Methods Silica coating was prepared with colloidal silica sol on alumina ceramic surface that was treated with air particle abrasion. Infrared spectrum （IR）,scanning electron microscopy （SEM） and energy dispersive spectrometer （EDS） were used to analyze the silica coating. A total of 32 alumina ceramic discs were randomly divided into 4 groups with 8 discs per group, which received different surface treatments as silane couple agent （ control group） , 20% silica sol ＋ silane（group A）, 30% silica sol ＋ silane（ group B） , 40% silica sol ＋ silane（group C ）. Each ceramic disc was bonded to composite with resin cement, and then shear bond strength of these samples was tested. Results It was observed from the IR pictures that symmetrically flexible vibration absorption kurtosis, anti-symmetrically flexible vibration absorption kurtosis, and bending vibration absorption kurtosis of Si-O-Si enhanced after heat treatment. SEM pictures showed that nanoparticles in coating gel were well distributed and some of them conglomerated after heat treatment. There was a little conglomeration in 20% coating, more in 30% , and the most in 40%. Contents of surface silicon increased after modification with silica coating prepared by sol-gel method. Bond strength of three groups with silica coating was significantly higher than that of the group with only silane couple agent[ （ 1. 881 ± 0. 156） MPa ] （ P 〈 0. 05 ）. Group B gained the highest strength [ （4. 852 ± 0. 178 ） MPa ] compared with groupA[（3.196 ±0.171） MPa] and group C[（3.576 ±0.671） MPa] （P 〈0.05）. Conclusions Surface silicon contents all increased after surface modification with different concentration silica sol. Silica coating followed with silane couple agent could significantly enforce bond strength of alumina ceramic, with 30% silica sol gr

关 键 词：牙瓷料 纳米硅涂层 剪切粘结强度 

分 类 号：R783.1[医药卫生—口腔医学]