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首页> 外文期刊>The Journal of Prosthetic Dentistry >Accuracy of the newly formulated vinyl siloxanether elastomeric impression material.
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Accuracy of the newly formulated vinyl siloxanether elastomeric impression material.

机译：新配制的乙烯基硅氧烷/弹性体压印材料的精度。

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STATEMENT OF PROBLEM: A newly formulated vinyl siloxanether elastomeric impression material is available, but there is little knowledge of its accuracy in relation to existing materials. PURPOSE: The purpose of this in vitro study was to assess the accuracy of disinfected vinyl siloxanether impressions and compare the accuracy to a common vinyl polysiloxane and a polyether impression system. MATERIAL AND METHODS: Impressions were made from a modified dentoform master model containing a simulated crown preparation. Dimensional changes (mm) between the master model and working casts (type IV gypsum) were assessed. The following were evaluated: vinyl polysiloxane in a 1-step, dual-viscosity technique (VPS Dual), polyether as monophase material (PE Mono), and vinyl siloxanether in a 1-step, dual-viscosity (VSE Dual), and monophase technique (VSE Mono). Measurements of the master model and working casts, including anteroposterior (AP) and cross-arch (XA) dimensions, were made with a measuring microscope. The simulated crown preparation was measured in mesiodistal (MDG, MDO), buccolingual (BLG, BLO), and occlusogingival dimensions (OGL, OGB). Disinfection involved immersion for 10 minutes in potassium peroxomonosulfate, sodium benzoate, tartaric acid solution, or no disinfection (control) (n=8). A multivariate GLM statistical approach (MANOVA) was used to analyze the data (alpha=.05). Pearson's correlation test was used for related dimensions. RESULTS: The AP and XA dimensions of working casts were larger than the master for the disinfected condition and control. Whether disinfected or not, the working dies were shorter in height (OGB, OGL), larger in the buccolingual dimension (BLO, BLG), somewhat larger in the MDO dimension, and somewhat smaller in the MDG dimension compared to the prepared tooth of the master model, resulting in an irregular or oval profile. There were significant differences among the impression systems for each dimension except AP. Differences between the disinfected and nondisinfected conditions were significant (P=.03) with respect to dimensions of the gypsum working cast, but not for dimensions of the working die (P=.97). In general, differences relative to the master were small and of minor clinical significance considering marginal gaps of crowns smaller than 150-100 mum are considered clinically acceptable. CONCLUSIONS: VSE monophase impressions and VSE dual-viscosity impressions demonstrated acceptable accuracy for clinical use with immersion disinfection, since the results for VSE were comparable to the results for PE and VPS materials, and the differences as compared to the master model were small.
机译：问题陈述：可以使用一种新配制的乙烯基硅氧烷热塑压印材料，但对它与现有材料的准确性了解甚少。目的：这项体外研究的目的是评估消毒的乙烯基硅氧烷热压印的准确性，并将其与常见的乙烯基聚硅氧烷和聚醚压印系统进行比较。材料和方法：印象是从包含模拟牙冠制备物的改良牙本质模型中得出的。评估了模型和工作铸件（IV型石膏）之间的尺寸变化（mm）。评估了以下内容：1步双粘度技术中的乙烯基聚硅氧烷（VPS Dual），单相材料的聚醚（PE Mono）和1步，双粘度中的乙烯基醚（VSE Dual）和单相技术（VSE Mono）。使用测量显微镜对主模型和工作模型进行测量，包括前后（AP）和横弓（XA）尺寸。模拟的牙冠准备以近中颌骨（MDG，MDO），颊舌（BLG，BLO）和咬合龈尺寸（OGL，OGB）进行测量。消毒包括在过氧单硫酸钾，苯甲酸钠，酒石酸溶液中浸泡10分钟，或不消毒（对照组）（n = 8）。多元GLM统计方法（MANOVA）用于分析数据（alpha = .05）。皮尔逊相关检验用于相关尺寸。结果：在消毒和控制条件下，铸件的AP和XA尺寸均大于母模。与准备好的牙齿相比，无论是否经过消毒，工作模的高度都较短（OGB，OGL），颊舌尺寸（BLO，BLG）较大，MDO尺寸较大，MDG尺寸较小。主模型，导致不规则或椭圆形轮廓。除AP以外，每个维度的印象系统之间都存在显着差异。就石膏加工铸件的尺寸而言，已消毒和未消毒条件之间的差异是显着的（P = .03），但对于加工模具的尺寸而言，则没有差异（P = .97）。通常，考虑到牙冠的边缘间隙小于150-100毫米，相对于母版的差异很小，临床意义不大。结论：VSE单相压痕和VSE双粘度压痕证明了浸入式消毒的临床使用可接受的准确性，因为VSE的结果与PE和VPS材料的结果相当，并且与主模型相比差异很小。

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