Color Stability of Re-Injection Acetal Resin with Different Percentages or Several Times

Rasha Mohammed Zwwyer, Nidhal Sahib Mansoor
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Abstract

Studies in a variety of scientific disciplines have experimented with various techniques for recycling and reusing the materials they utilize on a regular basis, in this study suggest to re cycling waste of acetal resin.Purpose: The purpose of this study was to assess and compare the color change of re-injection acetal resin with different percentages or several times.Material and Methods: Specimens were prepared with dimensions (20±1 mm in diameter x 0.5 mm in thickness) for color stability test and injection according to the manufacture’s instruction for acetal resin as denture base materials and aesthetic clasp. The first group represent control group with (100% New) and other five groups as experimental groups (group II, group III, and group III) with different percentages between new acetal materials and old acetal materials, while two last groups with several times (group IV and group V) only used old acetal materials. Preparation the ratio between the new material with the old material according to pilot study and the best ratio in this study is 25% new acetal material and 75% old acetal material (group II). The old material is preparation by acetal sprue is collected and cutting by cutter and re-injection with new acetal resin.Results: Statistically non-significant difference in color change in re-injection acetal resin, when comparing the control group with mean (1.046±0.094) and re-injection groups with means respectively (1.040 ±0.076,0.942±0.115,0.993±0.137, 0.978±0.060, and 0.970±0.098).Conclusion: Color change was statistically non-significant differences between all studied groups.
不同比例或多次再注塑乙缩醛树脂的颜色稳定性
目的:本研究的目的是评估和比较不同比例或多次重新注射乙缩醛树脂的颜色变化:制备直径为 20±1 mm x 厚度为 0.5 mm 的试样,用于颜色稳定性测试,并根据生产说明注射乙缩醛树脂作为义齿基托材料和美学卡环。第一组为对照组(100% 新),其他五组为实验组(第二组、第三组和第三组),新旧乙缩醛树脂材料的比例各不相同,最后两组(第四组和第五组)多次使用旧乙缩醛树脂材料。新材料与旧材料的配制比例是根据试验研究确定的,本研究的最佳比例是 25% 的新乙缩醛材料和 75% 的旧乙缩醛材料(第二组)。旧材料的制备方法是收集乙缩醛浇口并用切割机切割,然后重新注入新的乙缩醛树脂:结果:对照组平均值(1.046±0.094)与重新注射组平均值(1.040±0.076,0.942±0.115,0.993±0.137,0.978±0.060,0.970±0.098)相比,重新注射乙缩醛树脂的颜色变化差异无统计学意义:所有研究组的颜色变化在统计学上无显著差异。
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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