Factors affecting the dimensional stability of elastic impression materials.
Factors affecting the dimensional stability of elastic impression materials.
复制标题
影响弹性印模材料尺寸稳定性的因素。
DOI：
10.1016/0300-5712(73)90103-6
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发表时间：
1973
影响因子：
4.4
通讯作者：
David Brown
中科院分区：
文献类型：
--
作者：
David Brown
分析了弹性印模材料在使用过程中和使用后可能产生误差的来源。在考虑到这一分析的情况下设计的实验同时在这些材料的亲水胶体和弹性体基上进行。(在每种材料的尺寸精度和稳定性的评估中，使用了在底切和非底切金属母模的1小时和1周之间间隔浇注的石模型之间的尺寸差异。)二氧化铅固化的聚硫化物和亚胺封端的聚醚印模材料受细菌的影响最小，这些印模材料伴随着它们从底切区撤出。在储存过程中，二氧化铅固化的多硫化物最不容易受到吸水和溶剂损失的影响，而聚醚材料则吸水并膨胀。有机硅聚合物和亲水性胶体材料在长期储存过程中不能保持其准确性。
The sources of inaccuracy which can develop during and after the use of elastic impression materials were analysed. Experiments designed with this analysis in mind were performed on both the hydrocolloid and elastomeric groups of these materials. (The dimensional differences between stone models poured at intervals between 1 hour and 1 week of both undercut and non-undercut metal master models were used in an assessment of the dimensional accuracy and stability of each type of material.) The lead-dioxide-cured polysulphide and the imine-terminated polyether impression materials were least affected by the strain accompanying their withdrawal from undercut regions. During storage the lead-dioxide-cured polysulphides were the least susceptible to both water absorption and solvent loss, whereas the polyether material absorbed water and swelled. The silicone polymers and the hydrocolloid materials did not maintain their accuracy during long storage.