CAJ | 학술논문

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。
목적：비교납미수지여궤충미혼합전료수지적신고화후포광성능。방법1충납미수지（Z350）화4충미혼합전료수지（P60、Z250、Spectrum、AP-X），이측벽지중심분층전압고화법，제비8 mm×8 mm×5 mm양괴，용Super-Snap포광채설연마화포광각양괴8 mm×5 mm적측벽，측량비교표면조조치（Ra）。결과 P60적Ra치최저（0.125±0.030μm），Z250、Spectrum차지， Z350적Ra치（0.205±0.052μm）고우전3자，AP-X조조도최대。소묘전경하，P60양괴포광면과립교소이차균균，표면화흔불명현。Z350양괴포광면세이천적화흔교다견，화흔처유전료탈락형성결손。결론납미수지Z350경채설포광，체도량호적광길표면，단광활도불여일사미혼합전료수지。
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.