Fehér A, Mörmann W H
Klinik für Präventivzahnmedizin, Parodontologie und Kariologie, Universität Zürich.
Schweiz Monatsschr Zahnmed. 1995;105(4):474-9.
Four groups of computer machined (Cerec 64 microns) Vita Mk II porcelain samples with six blocks (12 x 7 x 1.5 mm) each were finished, using super-fine diamond burs (15, 8, 4 microns) and Proxoshape files (15, 8, 4 microns) and additionally polished with standard round and experimental angular cut discs. Surface roughness was measured after each treatment. For control, porcelain surfaces were high-gloss polished with a laboratory polishing machine (LPM). The roughness values R15/8/4 achieved with 15/8/4 microns diamond burs, were significantly different between the diamond grain sizes used: R15 = 1.49 +/- 0.44 > R8 = 0.86 +/- 0.25 (p < 0.05); R8 = 0.86 +/- 0.25 > R4 = 0.56 +/- 0.10 (p < or = 0.055); R4 = 0.56 +/- 0.10 > RLPM = 0.05 +/- 0.01 (p < 0.001). The diamond coated Proxoshape files caused the following roughness values RP15 = 0.53 U +/- 0.17 > RP8 = 0.24 +/- 0.06 (p < 0.01) and the Proxoshape file with 4 microns diamond coating did not achieve lower roughness values. The 8 microns diamond coating of burs and Proxoshape files caused a very fine "pre-polish" surface quality on porcelain. Angular discs had the same polishing ability as standard round discs but were more effectively used in fissures.
制备了四组计算机加工（Cerec 64微米）的Vita Mk II瓷样本，每组有六个方块（12×7×1.5毫米），使用超细金刚石车针（15、8、4微米）和Proxoshape锉（15、8、4微米）进行修整，并额外使用标准圆形和实验性角形切割盘进行抛光。每次处理后测量表面粗糙度。作为对照，用实验室抛光机（LPM）对瓷表面进行高光抛光。使用15/8/4微米金刚石车针获得的粗糙度值R15/8/4，在所使用的金刚石粒度之间存在显著差异：R15 = 1.49±0.44＞R8 = 0.86±0.25（p＜0.05）；R8 = 0.86±0.25＞R4 = 0.56±0.10（p≤0.055）；R4 = 0.56±0.10＞RLPM = 0.05±0.01（p＜0.001）。金刚石涂层的Proxoshape锉产生了以下粗糙度值：RP15 = 0.53 U±0.17＞RP8 = 0.24±0.06（p＜0.01），且4微米金刚石涂层的Proxoshape锉未获得更低的粗糙度值。8微米金刚石涂层的车针和Proxoshape锉在瓷表面产生了非常精细的“预抛光”表面质量。角形切割盘与标准圆形切割盘具有相同的抛光能力，但在裂隙中使用更有效。
