Thermoplastic composites for veneering posterior teeth-a feasibility study.
Thermoplastic composites for veneering posterior teeth-a feasibility study.
复制标题
用于镶面后牙的热塑性复合材料——可行性研究。
DOI：
10.1016/s0109-5641(01)00073-2
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Seghi,RobertR
中科院分区：
文献类型：
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作者：
Gegauff,AnthonyG;Garcia,JoseL;Koelling,KurtW;Seghi,RobertR
目的：本初步研究旨在探索选择的商用热塑性复合材料，这些复合材料的物理性能可能优于目前可用的牙科系统，用于修复美观的后牙冠。方法对聚氨酯、聚碳酸酯和聚乙烯醇/四氟乙烯（ETFE）复合材料和未填充的聚氨酯试样进行注射成型，使其形状适应五种标准化力学试验。力学性能测试包括磨粒磨损率、屈服强度、表观断裂韧性（强度比）、弯曲强度和抗压强度。结果与市买牙科复合材料相比，所有测试材料的磨损率都较低，填充聚碳酸酯和填充聚氨酯树脂的屈服强度更高，断裂韧性测试无效（强度比用于中试材料的比较计算），弯曲强度大致相似，除了填充ETFE明显更高，抗压强度更低。商业上可用的热塑性树脂复合材料，如聚氨酯，展示了人工冠材料的发展潜力，如果可以提高抗压强度，这种材料的机械性能将超过目前可用的美学系统。
ObjectivesThis pilot study was conducted to explore selected commercially-available thermoplastic composites that potentially had physical properties superior to currently available dental systems for restoring esthetic posterior crowns.MethodsPolyurethane, polycarbonate, and poly(ethylene/tetrafluoroethylene) (ETFE) composites and unfilled polyurethane specimens were injection molded to produce shapes adaptive to five standardized mechanical tests. The mechanical testing included abrasive wear rate, yield strength, apparent fracture toughness (strength ratio), flexural strength, and compressive strength.ResultsCompared to commercially available dental composites, abrasion wear rates were lower for all materials tested, yield strength was greater for the filled polycarbonates and filled polyurethane resins, fracture toughness testing was invalid (strength ratios were calculated for comparison of the pilot test materials), flexural strength was roughly similar except for the filled ETFE which was significantly greater, and compressive strength was lower.SignificanceCommercially available thermoplastic resin composites, such as polyurethane, demonstrate the potential for development of an artificial crown material which exceeds the mechanical properties of currently available esthetic systems, if compressive strength can be improved.