Odatsu Tetsurou, Jimbo Ryo, Wennerberg Ann, Watanabe Ikuya, Sawase Takashi
Department of Applied Prosthodontics, Graduate School of Biomedical Science, Nagasaki University 1-7-1 Sakamoto, Nagasaki 852-8588, Japan.
Am J Dent. 2013 Feb;26(1):51-5.
To investigate the effect of surface polishing and finishing methods on the surface roughness of restorative ceramics.
Disk specimens were prepared from feldspar-based, lithium disilicate-based, fluorapatite leucite-based and zirconia ceramics. Four kinds of surface polishing/finishing methods evaluated were: Group 1:
carborundum points (CP); Group 2: silicon points (SP); Group 3: diamond paste (DP); Group 4: glazing (GZ). Surface roughness was measured using an interferometer and the parameters of Sa (average height deviation of the surface) and St (maximum peak-to-valley height of the surface) were evaluated. Data were statistically analyzed using two-way ANOVA (P < 0.05) followed by post-hoc test. The mean values were also compared by Student's t-test. Specimen surfaces were evaluated by 3-D images using an interferometer.
The zirconia showed the least surface roughness (Sa and St) values after grinding with carborundum points. The significantly lowest Sa values and St values were obtained for lithium disilicate and zirconia ceramics surfaces finished with DP and GZ. The fluorapatite leucite ceramic showed significantly reduced Sa and St values from DP to GZ. The feldspathic porcelain showed the highest surface roughness values among all types of ceramics after all of the polishing/finishing procedures.
研究表面抛光和精加工方法对修复性陶瓷表面粗糙度的影响。
用长石基、二硅酸锂基、氟磷灰石白榴石基和氧化锆陶瓷制备圆盘试样。评估的四种表面抛光/精加工方法为：第1组：
金刚砂磨头（CP）；第2组：硅磨头（SP）；第3组：金刚石膏（DP）；第4组：上釉（GZ）。使用干涉仪测量表面粗糙度，并评估Sa（表面平均高度偏差）和St（表面最大峰谷高度）参数。数据采用双向方差分析（P<0.05）进行统计分析，随后进行事后检验。平均值也通过学生t检验进行比较。使用干涉仪通过三维图像评估试样表面。
用金刚砂磨头研磨后，氧化锆的表面粗糙度（Sa和St）值最低。用DP和GZ精加工的二硅酸锂和氧化锆陶瓷表面获得了显著最低的Sa值和St值。氟磷灰石白榴石陶瓷从DP到GZ的Sa和St值显著降低。在所有抛光/精加工程序后，长石质瓷在所有类型的陶瓷中表面粗糙度值最高。
