Takahashi Hidekazu, Finger Werner J, Kurokawa Rie, Furukawa Masae, Komatsu Masashi
Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Quintessence Int. 2010 Mar;41(3):e43-50.
To determine the sulcus penetration ability of hydrophilic and hydrophobic polyvinyl siloxane (PVS) impression materials by impression technique, temperature, and sulcus width.
Hydrophilic Flexitime (FLE; Heraeus Kulzer) and its hydrophobic counterpart (EXP) without surfactant were investigated, using light (L), monophase (M), and heavy (H) consistencies. A truncated steel cone surrounded by a 2-mm-deep and 50-, 100-, or 200-microm-wide sulcus, simulating the gingival tissue with agar, served as the test model. Impressions were made with single-mix (L or M) and double-mix (LM or LH) techniques at 23 degrees C and 37 degrees C, respectively. The reproduced sulcus heights were measured with a 3D laser scanner. Data were analyzed by ANOVA and Tukey HSD (P < .05).
Irrespective of sulcus widths and temperature FLE-L penetrated deepest (> 1.9 mm); FLE-M, -LM, and-LH reproductions were shorter with narrow sulci. Reproductions of 50- and 100-microm sulci with EXP-L were shallower than with FLE-L. The shortest reproduction was, however, greater than 1.6 mm.
In spite of some significant differences found in sulcus-reproducing ability with hydrophilic and hydrophobic impression materials applied at different impression-making temperatures and with different techniques, the practical relevance is limited.
通过印模技术、温度和龈沟宽度来确定亲水性和疏水性聚乙烯基硅氧烷（PVS）印模材料的龈沟渗透能力。
研究了亲水性Flexitime（FLE；贺利氏古莎公司）及其不含表面活性剂的疏水性对应产品（EXP），采用轻度（L）、单相（M）和重度（H）稠度。用琼脂模拟牙龈组织，以一个被2毫米深、50、100或200微米宽的龈沟环绕的截顶钢圆锥作为测试模型。分别在23℃和37℃下，采用单混（L或M）和双混（LM或LH）技术制取印模。用三维激光扫描仪测量复制的龈沟高度。数据采用方差分析和Tukey HSD检验进行分析（P < .05）。
无论龈沟宽度和温度如何，FLE-L渗透最深（> 1.9毫米）；FLE-M、-LM和-LH在窄龈沟时复制的龈沟高度较短。EXP-L对50和100微米龈沟的复制比FLE-L浅。然而，最短的复制高度大于1.6毫米。
尽管在不同印模制作温度和不同技术下应用亲水性和疏水性印模材料时，龈沟复制能力存在一些显著差异，但其实际相关性有限。
