Mohammed Nada Z, Al-Jmmal Amrah Y, Sadoon Mohammed M
Department of Prosthodontics Dentistry, University of Mosul, Mosul, Iraq.
J Int Soc Prev Community Dent. 2024 Oct 29;14(5):421-428. doi: 10.4103/jispcd.jispcd_10_24. eCollection 2024 Sep-Oct.
This study was conducted to improve the wettability of heat cured acrylic resin by the incorporation of recycled poly methyl methacrylate (PMMA) as well as the assessment of how different aging times affected it.
A total of 40 heat cured resin specimens were prepared and randomly divided into: The study and the control groups. Recycled PMMA was added to the study group at 1%, 3%, and 5% concentrations by volume. The wettability of control and study group specimens was assessed after being aged for different aging times by the assessment of wetting angle utilizing a sessile drop method and Image J analysis software. The collected data were analyzed statistically using IBM Statistical Package for Social Sciences software (Armonk, NY, USA) version 23. Shapiro-Wilk, one-way analysis of variance, and Tukey's tests were employed for the statistical analysis at ≤ 0.05.
The addition of recycled PMMA significantly improves the wettability of acrylic resin ( ≤ 0.05). The aging process had a significant impact on the wettability of control and study groups. The wettability of control and study groups increased with aging and this increase was directly associated with the aging time till 1 year of aging, their wettability started to decline although it remained less than that after 1 month of aging.
It has been concluded that the incorporation of recycled PMMA significantly improves the wettability heat cured acrylic resin. The wettability of the aged control and study group was significantly affected by aging times.
本研究旨在通过加入回收聚甲基丙烯酸甲酯（PMMA）来提高热固化丙烯酸树脂的润湿性，并评估不同老化时间对其的影响。
共制备40个热固化树脂标本，并随机分为：研究组和对照组。将回收的PMMA按体积浓度1%、3%和5%添加到研究组中。通过使用静滴法和Image J分析软件评估接触角，在不同老化时间后评估对照组和研究组标本的润湿性。使用美国纽约州阿蒙克市IBM社会科学统计软件包23版对收集的数据进行统计分析。采用夏皮罗-威尔克检验、单因素方差分析和图基检验进行统计分析，显著性水平设定为α≤0.05。
添加回收的PMMA显著提高了丙烯酸树脂的润湿性（P≤0.05）。老化过程对对照组和研究组的润湿性有显著影响。对照组和研究组的润湿性随老化时间增加，这种增加与老化时间直接相关，直至老化1年，尽管其润湿性仍低于老化1个月后的水平，但开始下降。
得出结论，加入回收的PMMA可显著提高热固化丙烯酸树脂的润湿性。老化对照组和研究组的润湿性受老化时间的显著影响。
