超声预备牙体表面的三维形貌分析  

3-D surface topography of ultrasonic preparation tooth: A pilot study

作　　者：侯永福[1] 边华琴[1] 张磊[1] 孙珍[1] 

机构地区：[1]合肥市口腔医院,安徽合肥230001

出　　处：《上海口腔医学》2016年第3期288-291,共4页Shanghai Journal of Stomatology

摘　　要：目的 :了解超声制备牙体的表面三维形貌特征。方法 :将纳入的10颗上颌前磨牙,按照临床烤瓷冠牙体预备要求及步骤,完成牙体初步预备,形成的浅凹形肩台,采用分半预备,牙体一半(对照侧)使用常规马尼车针制备肩台及抛光,另一半(超声处理侧)依次使用超声预备车针PM1/PM2/PM4制备肩台及抛光,完成肩台边缘线,使肩台均匀下移约0.5 mm。通过电镜及白光干涉仪观察、记录表面三维粗糙度、表面偏态,采用SPSS13.0软件包对所得的各组数据进行独立样本t检验分析。结果:扫描电镜及白光干涉仪均观察到,对照组表面旋转器械的砂石磨削痕迹明显;与处理组相比,呈现更细密的波纹状,而处理组波纹痕迹的上表面被较平整的小平面覆盖;超声处理组与对照组相比,处理组表面粗糙度以及表面偏态均显著小于对照组(P=0.011,P=0.000)。结论:超声预备的牙体表面形貌较常规旋转器械更平整、光滑。PURPOSE： To evaluate the 3-D surface topography of ultrasonically prepared tooth. METHODS： Ten extracted human maxillary premolars were prepared for crowns. A split-tooth model was used to refine the margins： half of the margin was finished with traditional rotary instruments, the other with ultrasonic instruments. The 3-D profiles of the prepared surface were observed under scanning electron microscopy and Talysurf CCI 3000 non-contact 3D profiler, and a quantitative comparison of 3-D surface roughness average（SA） and the surface of skewness（SSK） was conducted with Talymap Gold software. The data were analyzed by independent sample t test using SPSS13.0 software package.RESULTS： The surface finished with ultrasonic instruments exhibited a smoother surface. 3-D surface roughness analysis showed that the SA and SSK of surfaces made by ultrasonic instruments were significantly lower, compared with surfaces produced using conventional rotary instruments. CONCLUSIONS： The ultrasonic instruments produce surface in better condition than the conventional rotary instruments.

关 键 词：超声 三维表面形貌 牙体预备 

分 类 号：R783[医药卫生—口腔医学]