The influence of mixing methods and disinfectant on the physical properties of alginate impression materials

被引:12
|
作者
Dreesen, Karoline [1 ]
Kellens, Annelies [1 ]
Wevers, Martine [2 ]
Thilakarathne, Pushpike J. [3 ]
Willems, Guy [1 ]
机构
[1] Katholieke Univ Leuven, Dept Oral Hlth Sci, B-3000 Louvain, Belgium
[2] Katholieke Univ Leuven, Dept Met & Mat Engn, B-3000 Louvain, Belgium
[3] Katholieke Univ Leuven, BioStat L, B-3000 Louvain, Belgium
关键词
STABILITY; ACCURACY;
D O I
10.1093/ejo/cjs031
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
The aims of this in vitro study were to quantify the effect of manual versus automatic mixing and of using a disinfectant on mechanical properties of three different alginate impression materials. Two of the three alginates tested were especially developed for orthodontic use: Orthotrace (R) and Orthofine (R) while the third was a conventional alginate CA37FS (R). Alginates were mixed by hand or automatically using a Cavex alginate mixer II (R). Mixing was performed at room temperature using tap water. The material was allowed to set in a water bath at 35 degrees C (+/- 1 degrees C), simulating intra-oral setting conditions, and half of the samples were disinfected before testing. For each tested material, 10 standardized samples were used. The disinfectant used was the CavexImpreSafe (R) that has a bactericide, virucide, and fungicide function. The specimens were exposed for 3 minutes in a 3% solution and were then tested according to the ISO 1563: 1990 (E) standard specifications. Descriptive statistics and three-way analysis of variance were performed, and a 5% significance level was used for statistical analysis. Evaluation of tensile strength and elastic recovery of different alginate samples, hand versus automatical mixing or disinfected versus not disinfected, resulted in significant differences for all materials except for Orthofine (R). Considering detail reproduction, all three alginates evaluated reproduced the 50-mu m line successfully without interruption. The mixing method can significantly affect the elastic recovery and tensile strength of the alginates tested while the effect of using a disinfectant is less explicit.
引用
收藏
页码:381 / 387
页数:7
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