Boulton J L, Gage J P, Vincent P F, Basford K E
Department of Conservative Dental Surgery, Guy's Hospital, London.
Aust Dent J. 1996 Dec;41(6):398-404. doi: 10.1111/j.1834-7819.1996.tb06026.x.
Clinical success of fixed prosthodontic procedures is dependent in part upon the dimensional accuracy of elastomeric impression materials and impression procedures. Three elastomeric impression materials were used in custom and stock trays to determine the accuracy of impressions taken from an experimental stainless steel model representing premolar and molar bridge abutment preparations. Horizontal and vertical individual abutment and interabutment dimensions were measured on die stone replicas, and the measurements compared with those obtained from stainless steel master models. The results of this study demonstrate polysulphide is the least accurate impression material for both vertical and horizontal individual abutment dimensions. However, for interabutment horizontal dimensions, no statistical differences were noted between impression material types when using a custom tray. Stock trays produced unreliable results for all the materials tested.
固定义齿修复程序的临床成功部分取决于弹性印模材料和印模程序的尺寸精度。在定制托盘和成品托盘中使用了三种弹性印模材料，以确定从代表前磨牙和磨牙桥基牙预备的实验不锈钢模型上获取的印模的准确性。在石膏模型复制品上测量单个基牙的水平和垂直尺寸以及基牙间尺寸，并将测量结果与从不锈钢主模型获得的结果进行比较。本研究结果表明，对于单个基牙的垂直和水平尺寸，聚硫橡胶是最不准确的印模材料。然而，对于基牙间水平尺寸，使用定制托盘时，不同印模材料类型之间未发现统计学差异。对于所有测试材料，成品托盘产生的结果不可靠。
