Idris B, Houston F, Claffey N
Department of Restorative Dentisitry and Periodontology, Dental School, Trinity College, Dublin, Ireland.
J Prosthet Dent. 1995 Nov;74(5):535-41. doi: 10.1016/s0022-3913(05)80358-0.
This study compared the putty/wash one-step and two-step techniques for making addition silicone impressions. For each technique 15 impressions were made of a stainless steel base to which three tapered posts were attached. Stone models were made of all impressions. The results indicated that the interabutment distances increased slightly compared with the stainless steel model for both techniques, but the differences between techniques were not considered to be clinically important. The intraabutment measurements for the abutment without undercut increased, whereas abutments with undercuts decreased. These variations from the stainless steel model were also clinically insignificant.
本研究比较了用于制作加成型硅橡胶印模的油灰/冲洗一步法和两步法。对每种技术，在附有三个锥形桩的不锈钢基底上制作了15个印模。所有印模均制作了石膏模型。结果表明，与不锈钢模型相比，两种技术的基牙间距离均略有增加，但技术之间的差异在临床上被认为并不重要。无倒凹基牙的基牙内测量值增加，而有倒凹的基牙测量值减小。与不锈钢模型的这些差异在临床上也无显著意义。
