Dimensional stability of alginate molds scanned at different storage times.

G. Daneu, J. B. Vasconcelos, Paula Vp Oltramari, M. D. de Almeida, R. Guiraldo, T. Fernandes
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引用次数: 1

Abstract

The aim of this study was to evaluate the precision and accuracy of molds made with four commercial brands of alginate scanned at different times using digital model analysis. Eighty molds of a standard Typodont were made using 4 types of alginate (CCC: Cavex Color Change; IA: Identic Alginate; HY5: Hydrogum 5 and JP: Jeltrate Plus). The molds were scanned at four times: immediately (T1), 24h (T2), 72h (T3) and 120h (T4) after molding. Measurements were taken in three dimensions: anteroposterior, transverse and vertical. Significant differences in dimensional changes were noted between the materials over time (p <0.05). Anteroposterior dimensional variation was noted between times, especially for IA and JP. For transverse and vertical variables, a difference was found between the groups, especially at 24 h, 72 h and 120 h. CCC presented significant dimensional shrinkage only at T120 (transverse). IA and JP presented larger dimensional distortions in the vertical measurements. The molding materials used were not dimensionally stable when evaluated after 120 hours of molding. However, such evidence suggests that alginates with longer storage time, such as Cavex Color Change, are more accurate than conventional alginates.
不同贮存时间扫描海藻酸盐模具的尺寸稳定性。
本研究的目的是评估四个商业品牌的海藻酸盐在不同时间扫描的模具的精度和准确性,使用数字模型分析。用4种海藻酸盐(CCC: Cavex Color Change;IA:同型海藻酸盐;HY5: Hydrogum 5和JP: Jeltrate Plus)。模具在成型后立即(T1)、24h (T2)、72h (T3)和120h (T4)四次扫描。测量采取了三个维度:前后,横向和垂直。随着时间的推移,材料之间的尺寸变化有显著差异(p <0.05)。前后尺寸的变化在不同的时间被注意到,特别是IA和JP。对于横向和纵向变量,各组之间存在差异,特别是在24 h, 72 h和120 h。CCC仅在T120(横向)出现显著的尺寸收缩。IA和JP在垂直测量中表现出较大的尺寸畸变。使用的成型材料在成型120小时后评估尺寸不稳定。然而,这些证据表明,储存时间较长的海藻酸盐,如Cavex Color Change,比传统的海藻酸盐更准确。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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