Division of Removable Prosthodontics, Fukuoka Dental College , Fukuoka , Japan.
Acta Odontol Scand. 2014 Feb;72(2):139-44. doi: 10.3109/00016357.2013.814803. Epub 2013 Nov 21.
This study investigated the properties of injection-molded thermoplastic polyester denture base resins.
Two injection-molded thermoplastic polyester denture base resins (polyethylene terephthalate copolymer and polycycloalkylene terephthalate copolymer) were tested. Specimens of each denture base material were fabricated for flexural properties testing, Charpy impact testing and shear bond testing (n = 10). The flexural strength at the proportional limit, elastic modulus, Charpy impact strength and the shear bond strength of the two denture base materials were estimated.
The polycycloalkylene terephthalate copolymer denture base resin had significantly lower flexural strength at the proportional limit, lower elastic modulus, higher impact strength and lower shear bond strength compared to the polyethylene terephthalate copolymer denture base resin.
The properties of the injection-molded thermoplastic denture base resins composed of polyethylene terephthalate copolymer and polycycloalkylene terephthalate copolymer were different from each other. The polycycloalkylene terephthalate copolymer denture base resin had significantly lower flexural strength at the proportional limit, lower elastic modulus, higher impact strength and lower shear bond strength compared to the polyethylene terephthalate copolymer denture base resin.
本研究探讨了注塑型热塑性聚酯义齿基托树脂的性能。
测试了两种注塑型热塑性聚酯义齿基托树脂（聚对苯二甲酸乙二醇酯共聚物和聚环烷烃对苯二甲酸酯共聚物）。每种义齿基托材料的试件均用于进行弯曲性能测试、夏比冲击测试和剪切结合强度测试（n = 10）。估算了两种义齿基托材料的比例极限弯曲强度、弹性模量、夏比冲击强度和剪切结合强度。
与聚对苯二甲酸乙二醇酯共聚物义齿基托树脂相比，聚环烷烃对苯二甲酸酯共聚物义齿基托树脂的比例极限弯曲强度显著降低，弹性模量降低，冲击强度提高，剪切结合强度降低。
由聚对苯二甲酸乙二醇酯共聚物和聚环烷烃对苯二甲酸酯共聚物组成的注塑型热塑性义齿基托树脂的性能彼此不同。与聚对苯二甲酸乙二醇酯共聚物义齿基托树脂相比，聚环烷烃对苯二甲酸酯共聚物义齿基托树脂的比例极限弯曲强度显著降低，弹性模量降低，冲击强度提高，剪切结合强度降低。
