树脂表面粗糙度对丙烯酸树脂与硅橡胶粘接强度的影响  

Effect of surface treatment on the bonding of silicone elastomer to acrylic resin

作　　者：李风兰[1] 马兰[2] 石勇[1] 赵铱民[1] 

机构地区：[1]第四军医大学口腔医学院修复科,陕西西安710032 [2]山西省人民医院口腔修复科

出　　处：《中华口腔医学杂志》2009年第9期558-561,共4页Chinese Journal of Stomatology

基　　金：国家自然科学基金（30471908）

摘　　要：目的观察经不同机械处理的树脂与硅橡胶的粘接强度，探讨树脂表面粗糙度对丙烯酸树脂与硅橡胶粘接强度的影响，以期为临床提供依据。方法90个丙烯酸树脂试片根据随机数字表随机分为9组，每组10个，分别采用80、240、400、600、800、1000、1500目砂纸打磨（砂纸打磨组）或喷砂（喷砂组）、抛光（抛光组）处理，测试各组试片表面粗糙度Ra；制作硅橡胶-偶联剂-丙烯酸树脂粘接试件，测试试件剪切强度，即粘接强度，进行方差分析及SNK检验并观察破坏方式；将4个10mm×10mm×3mm的热凝丙烯酸树脂试片分别进行80目砂纸打磨、600目砂纸打磨、抛光和喷砂处理，扫描电镜观察树脂表面微观结构。结果喷砂组粗糙度Ra最高[（2.97±0.48）μm]，1500目砂纸打磨组粗糙度Ra最低[（0.21±0.14）μm]，各组间粗糙度Ra的差异均有统计学意义（P〈0.05）。喷砂组粘接强度[（0.98±0.11）MPa]显著低于其他处理组（P〈0.05），600目砂纸打磨组粘接强度最高[（2.13±0.14）MPa]，80、240目砂纸打磨组和喷砂组破坏方式为混合破坏，其他处理组破坏方式为内聚破坏。结论粗糙度过高并不利于提高丙烯酸树脂与硅橡胶间的粘接力，用较小粗糙度的600目砂纸打磨丙烯酸树脂表面可提高丙烯酸树脂与硅橡胶间的粘接强度。Objective To evaluate the effects of surface treatments on the bonding of silicone elastomer to acrylic resin. Methods Ninety acrylic resin specimens were randomly divided into 9 groups which were assigned to 9 different surface treatments： finished by 80-, 240-, 400-, 600-, 800-, 1000-, 1500- grit silicon carbide paper under running water, or polished or sandblasted. Roughness of the specimen surface was tested in each group, and the microstructure was observed with scanning electron microscopy （SEM）. ZY-1 silicone elastomer, ZA-1 primer and acrylic resin specimens were prepared. Shear bond strength were tested and failure modes were assessed for all specimens. Results The roughness of all 9 groups showed significant difference （P〈0.05）. The sandblasted group showed the highest rougbness [（2.97±0.48）μm], the 1500-grit silicon carbide paper finished group showed the lowest roughness [（0.21±0.14）μm]. The sandblasted groups showed the lowest bonding strength [（0.98±0.11）MPa] （P 〈0.05） while tbe 600- grit silicon carbide paper finished group sbowed the highest strength[（2.13±0.14） MPa]. Conclusions Over high surface roughness does not improve the shear bond strength between silicone elastomer and acrylic resin. Treatment of acrylic resin surface with 600-grit silicon carbide paper can increase the shear bond strength between silicone elastomer and acrylic resin.

关 键 词：弹性聚硅酮类 丙烯酸树脂类 抗剪切强度 

分 类 号：R686[医药卫生—骨科学]