Sinobad Tamara, Obradović-Djuricić Kosovka, Nikolić Zoran, Dodić Slobodan, Lazić Vojkan, Sinobad Vladimir, Jesenko-Rokvić Aleksandra
Vojnosanit Pregl. 2014 Mar;71(3):251-8. doi: 10.2298/vsp120709037s.
BACKGROUND/AIM: Dimensional stability and accuracy of an impression after chemical disinfection by immersion in disinfectants are crucial for the accuracy of final prosthetic restorations. The aim of this study was to assess the deformation of addition and condensation silicone impressions after disinfection in antimicrobial solutions.
A total of 120 impressions were made on the model of the upper arch representing three full metal-ceramic crown preparations. Four impression materials were used: two condensation silicones (Oranwash L - Zhermack and Xantopren L Blue - Heraeus Kulzer) and two addition silicones (Elite H-D + regular body - Zhermack and Flexitime correct flow - Heraeus Kulzer). After removal from the model the impressions were immediatel immersed in appropriate disinfectant (glutaraldehyde, benzalkonium chloride - Sterigum and 5.25% NaOC1) for a period of 10 min. The control group consisted of samples that were not treated with disinfectant solution. Consecutive measurements of identical impressions were realized with a Canon G9 (12 megapixels, 2 fps, 6x/24x), and automated with a computer Asus Lamborghini VX-2R Intel C2D 2.4 GHz, by using Remote Capture software package, so that time-depending series of images of the same impression were obtained.
The dimensional changes of all the samples were significant both as a function of time and the applied disinfectant. The results show significant differences of the obtained dimensional changes between the group of condensation silicones and the group of addition silicones for the same time, and the same applied disinfectant (p = 0.026, F = 3.95).
The greatest dimensional changes of addition and condensation silicone impressions appear in the first hour after their separation from the model.
背景/目的：通过浸泡在消毒剂中进行化学消毒后，印模的尺寸稳定性和准确性对于最终修复体的准确性至关重要。本研究的目的是评估在抗菌溶液中消毒后加成型和缩合型硅橡胶印模的变形情况。
在上颌弓模型上制作了总共120个印模，代表三种全金属烤瓷冠预备体。使用了四种印模材料：两种缩合型硅橡胶（Oranwash L - 泽马克公司和Xantopren L Blue - 贺利氏古莎公司）和两种加成型硅橡胶（Elite H-D + 常规型 - 泽马克公司和Flexitime correct flow - 贺利氏古莎公司）。从模型上取下印模后，立即将其浸泡在适当的消毒剂（戊二醛、苯扎氯铵 - Sterigum和5.25%次氯酸钠）中10分钟。对照组由未用消毒溶液处理的样本组成。使用佳能G9相机（1200万像素，2帧/秒，6倍/24倍变焦）对相同的印模进行连续测量，并通过华硕兰博基尼VX - 2R英特尔酷睿2双核2.4 GHz计算机，使用远程捕获软件包进行自动化操作，从而获得同一印模随时间变化的系列图像。
所有样本的尺寸变化在时间和所应用的消毒剂方面均具有显著性。结果表明，在相同时间和相同应用消毒剂的情况下，缩合型硅橡胶组和加成型硅橡胶组之间获得的尺寸变化存在显著差异（p = 0.026，F = 3.95）。
加成型和缩合型硅橡胶印模在与模型分离后的第一小时内尺寸变化最大。
