纳米树脂与几种微混合填料树脂固化后的抛光性能比较  

Comparison of surface roughness of nanofilled and microhybrid composite resins after curing and polishing

作　　者：蒋红[1] 吕达[1] 刘开蕾[1] 张伟生[1] 姚瑶[1] 廖楚宏 

机构地区：[1]北京大学深圳医院口腔科,广东深圳518036 [2]深圳大学化学与化工学院,广东深圳518036

出　　处：《南方医科大学学报》2014年第5期727-730,共4页Journal of Southern Medical University

基　　金：深圳市科技计划项目(201202013)

摘　　要：目的比较纳米树脂与几种微混合填料树脂的新固化后抛光性能。方法 1种纳米树脂(Z350)和4种微混合填料树脂(P60、Z250、Spectrum、AP-X),以侧壁至中心分层填压固化法,制备8 mm×8 mm×5 mm样块,用Super-Snap抛光彩碟研磨和抛光各样块8 mm×5 mm的侧壁,测量比较表面粗糙值(Ra)。结果 P60的Ra值最低(0.125±0.030μm),Z250、Spectrum次之,Z350的Ra值(0.205±0.052μm)高于前3者,AP-X粗糙度最大。扫描电镜下,P60样块抛光面颗粒较小而且均匀,表面划痕不明显。Z350样块抛光面细而浅的划痕较多见,划痕处有填料脱落形成缺损。结论纳米树脂Z350经彩碟抛光,达到良好的光洁表面,但光滑度不如一些微混合填料树脂。Objective To compare the surface roughness of nanofilled dental composite resin and microhybrid composite resins after curing and polishing. Methods A nanofilled composite （Z350） and 4 microhybrid composites （P60, Z250, Spectrum, and AP-X） were fabricated from the lateral to the medial layers to prepare 8 mm×8 mm×5 mm cubical specimens. The 4 lateral surfaces of each specimens were polished with abrasive disks （Super-Snap）. Profilometer was used to test the mean surface roughness （Ra） after polishing. Results P60 had the lowest Ra （0.125±0.030 μm） followed by Z250 and Spectrum. The Ra of Z350 （0.205±0.052μm） was greater than that of the other 3 resins, and AP-X had the roughest surfaces. Under scanning electron microscope, the polished faces of P60 resin were characterized by minor, evenly distributed particles with fewer scratches;the polished faces of Z350 presented with scratches where defects of the filling material could be seen. Conclusion The nanofilled composite Z350 has smooth surface after polishing by abrasive disks, but its smoothness remains inferior to that of other micro-hybrid composite resins.

关 键 词：复合树脂 抛光 粗糙度 纳米 

分 类 号：R783.1[医药卫生—口腔医学]