Plekavich E J, Joncas J M
J Prosthet Dent. 1983 Jun;49(6):772-6. doi: 10.1016/0022-3913(83)90346-3.
This study compared the adaptation of the margins of gold crowns produced from three impression-die combinations. Gold crowns were fabricated and cemented to prepared human teeth. After sectioning, the degree of margin opening was measured and the groups were compared. Crowns produced on silver dies from polysulfide impressions had a smaller margin opening than crowns made on dies of improved stone.
本研究比较了由三种印模 - 模型组合制作的金冠边缘的适应性。制作金冠并粘固于预备好的人牙上。切片后，测量边缘开口程度并比较各组情况。用聚硫橡胶印模制作在银质模型上的金冠比用改良石膏模型制作的金冠边缘开口更小。
