Evaluation of mechanical and thermal properties of commonly used denture base resins.
Evaluation of mechanical and thermal properties of commonly used denture base resins.
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DOI：
10.1111/j.1532-849x.2004.04002.x
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发表时间：
2004-03-01
期刊：
影响因子：
--
通讯作者：
Jones, Robert E
中科院分区：
文献类型：
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作者：
Phoenix, Rodney D;Mansueto, Michael A;Jones, Robert E
目得：本调查的目的是评估和比较6种常用的聚甲基丙烯酸甲酯义齿基托树脂的机械和热性能。材料和方法：吸附，溶解度，颜色稳定性，适应性，弯曲刚度和硬度进行了评估，以确定符合ADA规范第12号。使用差示扫描量热法和动态力学分析进行热评估。结果进行了评估，使用统计和观察analysis.RESULTS：所有材料满足ADA的要求，吸附，溶解度和颜色稳定性。适应性测试表明，微波活化系统提供了更好的适应相关联的铸件比传统的热活化树脂。根据弯曲测试结果，微波树脂相对较硬，而橡胶改性树脂更灵活。差示扫描量热法表明，微波活化系统比传统的热活化material.CONCLUSION更完全聚合：微波树脂显示更好的适应性，更大的刚度，更大的表面硬度比其他义齿基托树脂包括在这项调查中。弹性体增韧剂导致刚度降低、表面硬度降低和玻璃化转变温度降低。
PURPOSE: The purpose of this investigation was to evaluate and compare the mechanical and thermal properties of 6 commonly used polymethyl methacrylate denture base resins.MATERIALS AND METHODS: Sorption, solubility, color stability, adaptation, flexural stiffness, and hardness were assessed to determine compliance with ADA Specification No. 12. Thermal assessments were performed using differential scanning calorimetry and dynamic mechanical analysis. Results were assessed using statistical and observational analyses.RESULTS: All materials satisfied ADA requirements for sorption, solubility, and color stability. Adaptation testing indicated that microwave-activated systems provided better adaptation to associated casts than conventional heat-activated resins. According to flexural testing results, microwaveable resins were relatively stiff, while rubber-modified resins were more flexible. Differential scanning calorimetry indicated that microwave-activated systems were more completely polymerized than conventional heat-activated materials.CONCLUSION: The microwaveable resins displayed better adaptation, greater stiffness, and greater surface hardness than other denture base resins included in this investigation. Elastomeric toughening agents yielded decreased stiffness, decreased surface hardness, and decreased glass transition temperatures.