聚醚和聚硫化物材料某些性能的比较。
Comparison of some properties of polyether and polysulfide materials.
作者信息
Nayyar A, Tomlins C D, Fairhurst C W, Okabe T
出版信息
J Prosthet Dent. 1979 Aug;42(2):163-7. doi: 10.1016/0022-3913(79)90167-7.
Based on the present measurements on working time, setting time, and compression set of polyether and polysulfide materials, the following observations were made: 1. The manufacturer recommends a working time for polyether that is approximately 40 seconds more than that indicated by the clinical or ADA test. 2. Clinically, if more working time is desired, polysulfide impression material should be used. 3. Polysulfide material is more sensitive to temperature change than the polyether material. 4. If the material is allowed to set longer, the percentage change in compression set decreases. 5. For polyether, an increase in setting time of 2 minutes will significantly reduce the distortion of the impression upon removal.
基于目前对聚醚和聚硫化物材料的工作时间、凝固时间及压缩永久变形的测量，得出以下观察结果：1. 制造商推荐的聚醚工作时间比临床或ADA测试所表明的时间约长40秒。2. 在临床上，如果需要更长的工作时间，应使用聚硫化物印模材料。3. 聚硫化物材料比聚醚材料对温度变化更敏感。4. 如果材料凝固时间更长，压缩永久变形的百分比变化会减小。5. 对于聚醚，凝固时间增加2分钟将显著减少取出印模时的变形。
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