Giordano R, Cima M, Pober R
Department of Biomaterials, Goldman School of Graduate Dentistry, Boston University, Massachusetts 02118, USA.
Int J Prosthodont. 1995 Jul-Aug;8(4):311-9.
The effects of surface finish on flexural strength of a feldspathic porcelain, aluminous porcelain, and a computer aided design-computer aided machining porcelain (Vitabloc MKI) were examined. A total of 105 bars of the feldspathic ceramic were made, randomly divided into seven groups, and sintered according to manufacturer's recommendations. The groups consisted of as-fired, self-glazed, overglazed, ground, polished, ground/annealed, and polished/annealed. A total of 45 bars of the aluminous ceramic and Vitabloc MKI were made and randomly divided into three groups: as-fired, ground, and polished. Overglazing, grinding, and polishing all significantly increased (P < .05) the flexural strength (four-point-bend test) of the tested materials (15% to 30%).
研究了表面光洁度对长石质瓷、氧化铝瓷以及计算机辅助设计-计算机辅助加工瓷（维他灵MKI）弯曲强度的影响。共制作了105根长石质陶瓷棒，随机分为七组，并按照制造商的建议进行烧结。这些组包括烧制后、自釉、釉上彩、磨削、抛光、磨削/退火以及抛光/退火。共制作了45根氧化铝陶瓷棒和维他灵MKI棒，并随机分为三组：烧制后、磨削和抛光。釉上彩、磨削和抛光均显著提高（P < .05）了受试材料的弯曲强度（四点弯曲试验）（提高了15%至30%）。
