Isaac L, Joseph M, Bhat S, Shetty P
Department of Prosthodontics and Maxillofacial Prosthetics, College of Dental Surgery, Mangalore-575 001, India.
Indian J Dent Res. 2000 Jan-Mar;11(1):27-32.
A finite element analysis was carried out to analyse the stress variations in a mandibular posterior fixed partial denture (FPD), made of recast nickel-chromium alloy. A two dimensional finite element model was developed and then analysed with STAAD III/ISDS program with an occlusal load of 1 kg applied to the casting surface. The analysis revealed that the connectors experienced maximum stresses and the generated stress values decreased within the fixed partial denture made of recast Ni-Cr alloy. It seemed unlikely that FPD inspite of being made of recast alloy might fail before the other tissue components show signs of degeneration thus establishing the potential for recycling the Ni-Cr alloy in actual dental practice.
对由重铸镍铬合金制成的下颌后牙固定局部义齿（FPD）的应力变化进行了有限元分析。建立了二维有限元模型，然后使用STAAD III/ISDS程序进行分析，在铸件表面施加1kg的咬合负荷。分析表明，连接体承受的应力最大，在由重铸镍铬合金制成的固定局部义齿中，产生的应力值会降低。尽管是由重铸合金制成，但FPD似乎不太可能在其他组织成分出现退化迹象之前就失效，从而确立了在实际牙科实践中回收镍铬合金的可能性。
