Davis D R
Dent Mater. 1989 Mar;5(2):93-6. doi: 10.1016/0109-5641(89)90137-1.
Flaring of proximal walls of years, but not examined. In this experiment, the mass of investment peripheral to the wax patterns was varied by use of casting rings of the same lengths but of different diameters. Thirty castings were made individually, ten from each ring of 28 mm, 48 mm, and 60 mm diameter. The castings were cemented to their parent dies, sectioned mesiodistally, and the cement spaces at specific sites measured. Flaring angles were calculated for the proximal walls and were found to be inversely proportional to the diameters of the casting rings, and, thus, to the peripheral mass of investment. Further studies to detail the fluid mechanics of investments and to predict wax pattern behavior are warranted.
牙颈部近中壁呈喇叭口状，但未进行检查。在本实验中，通过使用长度相同但直径不同的铸圈，改变蜡型外周包埋材料的质量。分别制作了30个铸件，直径为28mm、48mm和60mm的铸圈各制作10个。将铸件粘固在其母模上，近远中向切割，测量特定部位的粘固剂间隙。计算近中壁的喇叭口角度，发现其与铸圈直径成反比，因此与包埋材料的外周质量成反比。有必要进一步研究以详细了解包埋材料的流体力学并预测蜡型行为。
