Lambodaran G, Chander N Gopi, Vasantakumar M
Department of Prosthodontics, SRM Dental College, Ramapuram, Chennai, Tamilnadu, India.
Indian J Dent Res. 2013 Jul-Aug;24(4):423-7. doi: 10.4103/0970-9290.118384.
To investigate the effect of superstructure materials and cuspal angle in an implant-supported fixed partial denture.
This finite element analysis study was carried out with varying cuspal angulations of 0°, 20° and 33° and superstructure materials. The simulated models were loaded with 300N forces under different axial and non-axial angulations. The graphical and numerical stresses were investigated.
The results demonstrated that the maximum stress occurred in the metal framework in all the materials except acrylic, for which it occurred in the coronal part of the implant. In the acrylic, the maximum stress recorded was 78 MPa with the 20° angulation. Ni Cr recorded a maximum stress of 111 MPa with the 33° angulation.
The cuspal morphology and type of superstructure material plays a pivotal role in controlling the stress transferred to the implant and the supporting bone.
研究种植体支持的固定局部义齿中上部结构材料和牙尖角度的影响。
本有限元分析研究采用了0°、20°和33°不同的牙尖角度以及上部结构材料。模拟模型在不同轴向和非轴向角度下承受300N的力。研究了图形和数值应力。
结果表明，除丙烯酸树脂外，所有材料的最大应力均出现在金属框架中，而丙烯酸树脂的最大应力出现在种植体的冠部。在丙烯酸树脂中，20°角度记录的最大应力为78MPa。镍铬合金在33°角度记录的最大应力为111MPa。
牙尖形态和上部结构材料类型在控制传递到种植体和支持骨的应力方面起着关键作用。
