PDF(Pubmed)
Abstract：
Denture fractures are a common problem in dental practice, and their repair is considered a first option to restore their functional properties. However, the inter-material resistance may become compromised. Typically, the bond between these materials weakens. Therefore, various surface treatment methods may be considered to enhance their mechanical properties. Poly(methyl methacrylate) (PMMA) heat-polymerized resin (HPR) was used as the repaired material, cold-polymerized material (CPR) for the repairs, and different variants of alumina abrasive blasting (AB), methyl methacrylate (M), ethyl acetate (EA), methylene chloride (CH), and isopropyl alcohol (IA) treatments were applied. Finally, combined surface treatments were chosen and analyzed. Surface morphologies after treatments were observed by scanning electron microscopy and the flexural, shear, and impact strengths were tested. AB and chemical treatment with CH, M, and EA was used to improve all mechanical properties, and further improvement of the properties could be achieved by combining both types of treatments. Varied changes in surface morphologies were observed. Treatment with IA yielded less favorable results due to the low impact strength. The best results were achieved for the combination of AB and CH, but during the application of CH it was necessary to strictly control the exposure time.
摘要：
义齿骨折是牙科实践中常见的问题，它们的修复被认为是恢复其功能属性的第一选择。然而,材料间电阻可能会受损。通常,这些材料之间的结合减弱。因此,可以考虑各种表面处理方法来增强它们的机械性能。使用聚（甲基丙烯酸甲酯）（PMMA）热聚合树脂（HPR）作为修复材料，用于维修的冷聚合材料(CPR)，和不同变体的氧化铝磨料喷砂（AB），甲基丙烯酸甲酯(M),乙酸乙酯(EA),二氯甲烷(CH),应用异丙醇(IA)处理。最后,选择并分析了组合表面处理。通过扫描电子显微镜和弯曲观察处理后的表面形貌,剪力,和冲击强度进行了测试。AB和CH化学处理，M,EA被用来改善所有的机械性能，并且通过结合两种类型的处理可以实现性能的进一步改善。观察到表面形态的变化。由于冲击强度低,用IA处理产生不太有利的结果。AB和CH的组合取得了最好的结果，但是在应用CH期间，必须严格控制暴露时间。
