Bomberg T J, Hatch R A, Hoffman W
J Prosthet Dent. 1985 Aug;54(2):170-2. doi: 10.1016/0022-3913(85)90278-1.
This study did not examine the accuracy of the resultant impressions. Rather, the impression material thickness in impressions made using both the highly advocated custom acrylic resin tray and in the highly used manufactured stock tray was examined. Comparison between the material thickness at the prepared tooth area revealed a mean difference in material thickness of less than 1 mm. The question of the significance of this difference remains to be answered. If the difference is not significant in the success of the impression and the resultant casting, then there are several advantages in using the manufactured stock tray; the first is economy. The average cost of a custom acrylic full arch impression tray is $3.65, compared with an average cost of slightly over $0.30 for the stock tray. The second advantage is the convenience factor. Making a custom tray requires planning, study models, laboratory time, curing interval, and finishing time. In contrast, the stock tray can be selected, adapted, and used in a single visit for both anticipated and unanticipated situations. If the difference in material thickness is significant, the custom tray is indicated. However, attention to detail in making and inserting the tray in the mouth must be observed to maximize the benefits of the custom tray.
本研究未检测最终印模的准确性。相反，研究了使用极力推荐的定制丙烯酸树脂托盘和广泛使用的成品托盘制作的印模中印模材料的厚度。对预备牙区域的材料厚度进行比较后发现，材料厚度的平均差异小于1毫米。这种差异的意义问题仍有待解答。如果这种差异对印模和最终铸件的成功与否没有显著影响，那么使用成品托盘有几个优点；首先是经济性。定制丙烯酸全牙弓印模托盘的平均成本为3.65美元，而成品托盘的平均成本略高于0.30美元。第二个优点是便利因素。制作定制托盘需要规划、研究模型、实验室时间、固化时间和修整时间。相比之下，成品托盘可以在单次就诊时选择、调整并用于预期和意外情况。如果材料厚度差异显著，则应使用定制托盘。然而，在制作托盘并将其放入口中时必须注意细节，以最大限度地发挥定制托盘的优势。
