Dern W M, Hinman R W, Hesby R A, Pelleu G B
J Prosthet Dent. 1985 Jun;53(6):874-6. doi: 10.1016/0022-3913(85)90174-x.
An evaluation of the effects of a two-step ringless partial denture investment technique on the castability of a base metal crown and fixed partial denture alloy was made. Castability values were obtained for 60 test patterns cast on two different casting units at two different mold temperatures. No significant differences were found between the control technique and the experimental technique. However, significant differences were found between castings made by the two different casting units at a temperature of 1250 degrees F.
对两步无圈局部义齿包埋技术对贱金属冠和固定局部义齿合金铸造性能的影响进行了评估。在两种不同的铸造单元上，于两种不同的铸模温度下铸造了60个测试铸型，并获得了铸造性能值。对照技术和实验技术之间未发现显著差异。然而，在华氏1250度的温度下，由两种不同铸造单元制作的铸件之间发现了显著差异。
