The aim of the study is to investigate the polymerization inhibition of elastomeric impression materials vinylpoly siloxane (VPS) and polyether (PE) when used in combination with retraction materials with and without subsequent cleaning with hydrogen peroxide (H2O2). Methods: Seven stainless steel specimens were fabricated. Four hundred and twenty impressions were made with three different elastomeric materials (140 each) as follows: group 1: VPS-Panasil; group 2: VPS-Express; group 3: PE-Monophase. Each material group was further subdivided into seven subgroups, based on use of no retraction material (control), three different retraction materials [Retraction capsule (RC3M), Dryz, Expasyl], and two cleaning techniques (water and H2O2). All subgroups included 20 impressions, which were made by a single operator using an automix gun. Evaluations were made using a visual scale by three calibrated examiners blindly and independently. Subjective categorization of the impressions were made as inhibited and uninhibited. Data were analyzed using Fisher's exact test and significance was set at p < 0.05. Results: Inhibited impressions were lower than uninhibited impressions among VPS materials (Panasil and Express); Panasil and Express showed comparable (p > 0.05) impression retardation. PE showed significantly higher inhibition compared to VPS materials (p < 0.05). Expasyl showed significantly higher polymerization inhibition than other retraction materials (p < 0.05). The use of H2O2 for cleaning showed significant reduction in polymerization inhibition than cleaning with water for Expasyl (p < 0.05). Conclusion: Overall contemporary retraction materials showed low potential for polymerization inhibition of elastomeric impression materials. Expasyl should be cleaned with H2O2 prior to impression making. However, Dryz and RC3M can show accurate impressions with water cleaning alone.

中文翻译：

---

当代收缩剂和过氧化氢清洗对弹性印模材料聚合的影响

该研究的目的是研究弹性印模材料乙烯基聚硅氧烷 (VPS) 和聚醚 (PE) 与回缩材料结合使用时的聚合抑制，随后用过氧化氢 (H2O2) 清洗或不使用过氧化氢 (H2O2)。方法：制作了七个不锈钢试样。用三种不同的弹性材料（每种 140 个）制作四百二十个印模，如下所示：第 1 组：VPS-Panasil；第 2 组：VPS-Express；第 3 组：PE-单相。根据使用无回缩材料（对照）、三种不同回缩材料 [回缩胶囊 (RC3M)、Dryz、Expasyl] 和两种清洁技术（水和 H2O2），每个材料组进一步细分为七个子组。所有子组包括 20 次印模，由一名操作员使用自动混合枪制作。评估是由三位经过校准的检查员盲目和独立地使用视觉量表进行的。印象的主观分类被分为抑制和不受抑制。使用Fisher精确检验分析数据，显着性设定为p < 0.05。结果：在VPS材料（Panasil和Express）中，抑制的印象低于未抑制的印象；Panasil 和 Express 表现出相当的 (p > 0.05) 印模延迟。与 VPS 材料相比，PE 显示出显着更高的抑制作用（p < 0.05）。Expasyl 显示出比其他回缩材料显着更高的聚合抑制 (p < 0.05)。对于 Expasyl，使用 H2O2 进行清洁显示聚合抑制比用水清洁显着降低（p < 0.05）。结论：总体而言，当代回缩材料对弹性印模材料的聚合抑制潜力较低。印模前应使用 H2O2 清洁 Expasyl。但是，Dryz 和 RC3M 仅用水清洗就可以显示准确的印象。