Vidovic Y, Chung H G, Mori T
Biomaterials Research Unit, Faculty of Dentistry, University of Sydney, New South Wales, Australia.
Dent Mater J. 1995 Dec;14(2):256-62. doi: 10.4012/dmj.14.256.
This study evaluated the sensitivity of an experimental model to mold temperature using a two-chamber casting machine and its recommended investment (Exp. 1), and the effect of sprue diameter and length using a one-chamber casting machine and its recommended investment (Exp. 2). Experimental patterns were cast from commercially pure titanium and percentage casting success obtained. Mold temperatures of 620, 350 and less than 100 degrees C, and sprues, 4 or 6 mm diameter and 5, 20 or 26 mm long, were used. The effect on casting success of a "non-system" investment was also evaluated in both experiments. The experimental model did not discriminate the two lower mold temperatures (Exp. 1). Casting success was significantly lower with a 4 mm sprue diameter but was not affected by sprue length (Exp. 2). The results suggest the importance of the combination of casting machine, investment type and mold dimension.
本研究使用双腔铸造机评估了实验模型对铸模温度的敏感性及其推荐的熔合金用量（实验1），并使用单腔铸造机评估了浇道直径和长度的影响及其推荐的熔合金用量（实验2）。用工业纯钛铸造实验铸型，并得出铸造成功率百分比。使用的铸模温度为620℃、350℃和低于100℃，浇道直径为4或6mm，长度为5、20或26mm。在两个实验中还评估了“非标准”熔合金用量对铸造成功的影响。实验模型无法区分两个较低的铸模温度（实验1）。浇道直径为4mm时，铸造成功率显著较低，但不受浇道长度影响（实验2）。结果表明铸造机、熔合金类型和铸模尺寸组合的重要性。
