Stress distribution & deflection in an Aramany class II obturator fabricated with cobalt-chromium & titanium alloys – 3D FEA

• Main Authors: Takshil D. Shah, Y.G. Naveen, Puttaraj Kattimani, Giridhar Kamath, Kalind Shah, Aasif Raza
• Format: Article
• Language: English
• Published: Elsevier 2019-04-01
• Series: Saudi Dental Journal
• Online Access: http://www.sciencedirect.com/science/article/pii/S1013905218305480

Purpose/objectives: The aim of the research was to develop a model that accurately represents an Aramany class II defect and its obturator prostheses fabricated with Cobalt Chromium alloy & Titanium alloy to compare the deflection and the stress distribution in the rehabilitated area. Methods: Aramany class II defect and the obturator prostheses was generated geometrically utilizing ANSYS 14.5, both overlaid on each other to impressionist prostheses and the maxilla as one element. Meshing of models was carried out utilizing HYPERMESH software & materialistic properties were assigned. The 120 N load was constituted on the teeth in different directions. Results: The stress distribution & deflection executed by ANSYS provided results that enabled the tracing of Von Mises stress and deflection field in the form of color veiled bands with standards in Mega Pascal (MPa). Conclusion: The study shows that Von Mises stresses are higher for the frame work fabricated with cobalt chromium alloy compared to Titanium alloy. The framework made of titanium alloy showed more deflection than cobalt chromium alloy. Clinical implications: 3D FEA can be performed on a computer without putting any stress on the human body from technical materials, which is especially difficult for maxillectomy patients. Keywords: Aramany Class II defect, Cobalt chromium alloy, Titanium alloy, Finite element analysis, Von Mises stresses