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首页> 外文期刊>The Journal of Advanced Prosthodontics >Influence of various metal oxides on mechanical and physical properties of heat-cured polymethyl methacrylate denture base resins
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Influence of various metal oxides on mechanical and physical properties of heat-cured polymethyl methacrylate denture base resins

机译：各种金属氧化物对热固化聚甲基丙烯酸甲酯假牙基体树脂力学和物理性能的影响

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PURPOSE To evaluate the effect of various metal oxides on impact strength (IS), fracture toughness (FT), water sorption (WSP) and solubility (WSL) of heat-cured acrylic resin. MATERIALS AND METHODS Fifty acrylic resin specimens were fabricated for each test and divided into five groups. Group 1 was the control group and Group 2, 3, 4 and 5 (test groups) included a mixture of 1% TiO2 and 1% ZrO2, 2% Al2O3, 2% TiO2, and 2% ZrO2 by volume, respectively. Rectangular unnotched specimens (50 mm × 6.0 mm × 4.0 mm) were fabricated and droptower impact testing machine was used to determine IS. For FT, compact test specimens were fabricated and tests were done with a universal testing machine with a cross-head speed of 5 mm/min. For WSP and WSL, discshaped specimens were fabricated and tests were performed in accordance to ISO 1567. ANOVA and Kruskal-Wallis tests were used for statistical analyses. RESULTS IS and FT values were significantly higher and WSP and WSL values were significantly lower in test groups than in control group ( P CONCLUSION Modification of heat-cured acrylic resin with metal oxides, especially with ZrO2, may be useful in preventing denture fractures and undesirable physical changes resulting from oral fluids clinically.
机译：目的评估各种金属氧化物对热固化丙烯酸树脂的冲击强度（IS），断裂韧性（FT），吸水率（WSP）和溶解度（WSL）的影响。材料与方法每次测试制作50个丙烯酸树脂样品，分为5组。第1组为对照组，第2、3、4和5组（测试组）包括1％TiO 2 和1％ZrO 2 ，2％Al的混合物 2 O 3 ，2％TiO 2 和2％ZrO 2 （按体积计）。制造矩形无缺口试样（50 mm×6.0 mm×4.0 mm），并使用落地式冲击试验机确定IS。对于FT，制造了紧凑的试样，并使用十字头速度为5 mm / min的通用测试机进行了测试。对于WSP和WSL，按照ISO 1567制作圆盘状样品并进行测试。使用ANOVA和Kruskal-Wallis测试进行统计分析。结果与对照组相比，试验组的IS和FT值显着较高，而WSP和WSL的值显着降低（P结论用金属氧化物，尤其是ZrO 2 改性热固化丙烯酸树脂可能可用于预防义齿断裂以及临床上因口服液引起的不良物理变化。

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