Modelling and structural analysis of skull/cranial implant: beyond mid-line deformities

This computational study explores modelling and finite element study of the implant under Intracranial pressure (ICP) conditions with normal ICP range (7 mm Hg to 15 mm Hg) or increased ICP (>I5 mm Hg). The implant fixation points allow implant behaviour with respect to intracranial pressure cond...

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Bibliographic Details
Published in:	Acta of bioengineering and biomechanics Vol. 19; no. 1; pp. 125 - 131
Main Authors:	Bogu, V Phanindra, Kumar, Y Ravi, Kumar Khanara, Asit
Format:	Journal Article
Language:	English
Published:	Poland 2017
Subjects:	Biocompatible Materials - chemistry Bone Cements - chemistry Bone Plates Bone-Implant Interface - physiopathology Computer Simulation Craniotomy - instrumentation Craniotomy - methods Elastic Modulus Equipment Failure Analysis Finite Element Analysis Humans Intracranial Pressure Ketones - chemistry Materials Testing Models, Biological Polyethylene Glycols - chemistry Polymethyl Methacrylate - chemistry Prosthesis Design Reconstructive Surgical Procedures - instrumentation Reconstructive Surgical Procedures - methods Skull - physiopathology Skull - surgery Stress, Mechanical Tensile Strength
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Summary:	This computational study explores modelling and finite element study of the implant under Intracranial pressure (ICP) conditions with normal ICP range (7 mm Hg to 15 mm Hg) or increased ICP (>I5 mm Hg). The implant fixation points allow implant behaviour with respect to intracranial pressure conditions. However, increased fixation points lead to variation in deformation and equivalent stress. Finite element analysis is providing a valuable insight to know the deformation and equivalent stress. The patient CT data (Computed Tomography) is processed in Mimics software to get the mesh model. The implant is modelled by using modified reverse engineering technique with the help of Rhinoceros software. This modelling method is applicable for all types of defects including those beyond the middle line and multiple ones. It is designed with eight fixation points and ten fixation points to fix an implant. Consequently, the mechanical deformation and equivalent stress (von Mises) are calculated in ANSYS 15 software with distinctive material properties such as Titanium alloy (Ti6Al4V), Polymethyl methacrylate (PMMA) and polyether-ether-ketone (PEEK). The deformation and equivalent stress results are obtained through ANSYS 15 software. It is observed that Ti6Al4V material shows low deformation and PEEK material shows less equivalent stress. Among all materials PEEK shows noticeably good result. Hence, a concept was established and more clinically relevant results can be expected with implementation of realistic 3D printed model in the future. This will allow physicians to gain knowledge and decrease surgery time with proper planning.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1509-409X
DOI:	10.5277/ABB-00547-2016-04