Proportioning effect on physical and chemical properties of polysulfide impression material.
Proportioning effect on physical and chemical properties of polysulfide impression material.
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配比对聚硫印模材料理化性能的影响
DOI：
10.1016/0022-3913(94)90561-4
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Paschal,S
中科院分区：
文献类型：
--
作者：
Rueggeberg,FA;Paschal,S
研究了多硫化物碱和催化剂配比的变化对反应的影响。轻体、规则体和重体浆料按碱与催化剂的线性等量比例30,70,40,50,60,60,70,30混合。压缩集、压缩应变和一致性测试符合美国牙科协会（ADA）规范19指南。研究了溶剂浸出组分的数量和固化产物交联性质的差异。压缩测试中的压缩集和应变符合ADA规范指南。一些一致性值超出了ADA规范限制。随着催化剂比例的增加，可浸出物含量增加，但所有体材料的聚合物交联都非常相似。临床医生不需要担心多硫化物压模材料的显著性能变化，这是由于根据说明书中的“眼球”估算比例的不同（在制造商建议长度的±20%范围内）。
This study investigated the effect of variation in proportioning polysulfide base and catalyst. Light, regular, and heavy-bodied pastes were mixed in linear equivalents of base-to-catalyst proportions of 30 70, 40 60, 50 50, 60 40, and 70 30. Compression set, strain in compression, and consistency tests conformed to the American Dental Association (ADA) Specification 19 guidelines. The amount of solvent-leachable components and differences in the cross-linked nature of the cured products were studied. Compression set and strain in compression tests met the ADA specification guidelines. Some consistency values fell outside of the ADA specification limits. The leachable content increased with increasing proportions of catalyst, but polymer cross-linking was remarkably similar for all bodied materials tested. Clinicians need not fear a significant property alteration in polysulfide impression material by the differences (within±20% of the manufacturer's suggested lengths) in proportioning the component pastes with “eyeball” estimation as directed in the instructions.