Tan E, Chai J
Northwestern University Dental School, Chicago, Illinois, USA.
Int J Prosthodont. 1995 Nov-Dec;8(6):541-7.
This study was conducted to evaluate the working times of seven elastomeric impression materials according to their detail reproduction and dimensional accuracy. Impressions were made of a standard ADA Specification No. 19 die at 30-second intervals until they were no longer workable. The detail reproduction and dimensional stability of these impressions were evaluated according to the ADA Specification No. 19 criteria and the dimensional stability was analyzed. It was found that the working times of the impression materials according to detail reproduction generally agreed with those estimated according to dimensional stability but not with the manufacturers' suggested working times.
本研究旨在根据七种弹性印模材料的细节再现性和尺寸精度评估其工作时间。每隔30秒用标准ADA第19号规范模型制作印模，直至印模材料不再可用。根据ADA第19号规范标准评估这些印模的细节再现性和尺寸稳定性，并对尺寸稳定性进行分析。结果发现，根据细节再现性得出的印模材料工作时间通常与根据尺寸稳定性估算的工作时间一致，但与制造商建议的工作时间不一致。
