Hamanaka Ippei, Iwamoto Misa, Lassila Lippo V J, Vallittu Pekka K, Takahashi Yutaka
Division of Removable Prosthodontics, Fukuoka Dental CollegeFukuokaJapan.
Department of Biomaterials Science, Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of TurkuTurkuFinland.
Acta Biomater Odontol Scand. 2016 Jan 26;2(1):31-37. doi: 10.3109/23337931.2015.1135747. eCollection 2016 Dec.
This study investigated the wear resistance of injection-molded thermoplastic denture base resins using nanoindentation instrument. Six injection-molded thermoplastic denture base resins (two polyamides, two polyesters, one polycarbonate, one polymethylmethacrylate [PMMA]) and a PMMA conventional heat-polymerized denture-based polymer control were tested. Elastic modulus, hardness, wear depth, and roughness were calculated using a nanoindentation instrument. Elastic modulus and hardness of the injection-molded thermoplastic denture base resins were significantly lower than those of the PMMA conventional heat-polymerized denture-based polymer. Wear depth of polycarbonate and PMMA conventional heat-polymerized denture-based polymer were significantly higher than that of other injection-molded thermoplastic denture base resins. The roughness of injection-molded thermoplastic denture base resins was significantly more than that of PMMA conventional heat-polymerized denture-based polymer after testing. Wear resistance of injection-molded thermoplastic denture base was low compared to PMMA conventional heat-polymerized denture-based polymers.
本研究使用纳米压痕仪调查注塑热塑性义齿基托树脂的耐磨性。测试了六种注塑热塑性义齿基托树脂（两种聚酰胺、两种聚酯、一种聚碳酸酯、一种聚甲基丙烯酸甲酯[PMMA]）以及一种PMMA传统热聚合义齿基托聚合物对照品。使用纳米压痕仪计算弹性模量、硬度、磨损深度和粗糙度。注塑热塑性义齿基托树脂的弹性模量和硬度显著低于PMMA传统热聚合义齿基托聚合物。聚碳酸酯和PMMA传统热聚合义齿基托聚合物的磨损深度显著高于其他注塑热塑性义齿基托树脂。测试后，注塑热塑性义齿基托树脂的粗糙度显著高于PMMA传统热聚合义齿基托聚合物。与PMMA传统热聚合义齿基托聚合物相比，注塑热塑性义齿基托的耐磨性较低。
