Grajower R, Lewinstein I
J Prosthet Dent. 1985 Feb;53(2):168-72. doi: 10.1016/0022-3913(85)90102-7.
An instrument was developed to carve wax patterns in a reproducible manner. The methods of wax application to the die and wax removal during carving were similar to routine laboratory procedures. The wax patterns were invested in stone with the dies on which they were prepared, and sectioned to allow the determination of their adaptation on sectioned samples. Shrinkage of wax patterns on dies was found to create a marginal gap at shoulders and bevels. Further shrinkage observed after removal from the die was attributed to relaxation of elastic stresses in the wax. Carving of bevels improved adaptation to the die for samples with large gaps at the shoulder. This improved adaptation can be attributed to plastic deformation in the wax bevel. Remodeling of pattern margins was found to improve adaptation to the die, especially if carried out after the pattern was removed and replaced on the die. Remodeling the margin should involve heating with a spatula of a narrow band of wax around the margin up to the axial die wall over the entire shoulder width.
开发了一种仪器，用于以可重复的方式雕刻蜡型。将蜡施加到铸模上的方法以及雕刻过程中蜡的去除方法与常规实验室程序相似。将蜡型与制备它们的铸模一起包埋在石膏中，并进行切片，以便在切片样本上确定它们的贴合情况。发现蜡型在铸模上收缩会在肩部和斜面上产生边缘间隙。从铸模上取下后观察到的进一步收缩归因于蜡中弹性应力的松弛。对于肩部有大间隙的样本，雕刻斜面可改善与铸模的贴合度。这种改善的贴合度可归因于蜡斜面中的塑性变形。发现重塑蜡型边缘可改善与铸模的贴合度，特别是在蜡型从铸模上取下并重新放置在铸模上之后进行时。重塑边缘应包括用刮刀加热边缘周围窄条蜡，直至在整个肩部宽度上达到轴向铸模壁。
