Combe E C, Nolan M
Biomaterials Science Unit, University of Manchester, Lancashire, England.
Scand Audiol. 1989;18(2):67-73. doi: 10.3109/01050398909070725.
In the first part of this work, the accuracy of impression materials was studied. In the present paper, the dimensional accuracy of a range of hard and soft polymeric earmould materials was studied and found to be a function of choice of material, processing equipment, curing cycle, time after processing, and choice and storage time of impression material. It was noted that generally speaking the overall shrinkage of a two-stage specimen is approximately equal to the sum of the impression shrinkage plus processing shrinkage. Clinical trials are now being conducted to assess the real ear performance of earmoulds as a function of material accuracy and flexibility.
在本研究的第一部分，对印模材料的准确性进行了研究。在本文中，对一系列硬质和软质聚合物耳模材料的尺寸准确性进行了研究，发现其是材料选择、加工设备、固化周期、加工后时间以及印模材料的选择和储存时间的函数。需要注意的是，一般来说，两阶段试样的总体收缩率大约等于印模收缩率加上加工收缩率之和。目前正在进行临床试验，以评估耳模在实际耳部应用中的性能，该性能是材料准确性和柔韧性的函数。
