Implementation of FEM and rapid prototyping in maxillofacial surgery

Abstract

This paper investigates the opportunity of implementing FE simulations and rapid prototyping tecniques on titanium implant in maxillofacial surgery case based on osteotomy. Maxilla region was recorded by Cone Beam CT with high resolution and optimal radiation. Then, it followed the medical image reconstruction into 3D voxelized model. This model was converted both, to stl surface model for rapid prototyping, CAD modeling and FE mesh for simulation purposes with keeping good volume and dimensional consistency. Stl meshed surface was imported into CAD software, as initial 3d structure, which is used for parametric and customized design of implant. Since, the osteotomy is final application, it wassimulated the cutting and shifting of maxilla for proper correction by digital prototyping. Then, the fixation points for shifted maxilla were determined by surgeon to provide steady and tight joints between implanting screws and maxilla. Applied implant was given in initial standard flat configuration. Flat implant configuration was adapted by complex 3D bending in CAD software to be customized towards surface conformity of maxillofacial anatomy. By FE simulation in MSC Patran/Nastran, it was performed the stress analysis of implant with different thickness configurations and 3D bending, which provides the optimized implant model with best fit dimensions. Optimized implant model and corresponding body model were converted into physical models. RP model of maxilla was post-processed by cutting and boring to provide an adequate implant positioning according to digital prototypes. This approach facilitated the preparation of complex shaped implants in swept and lofted form, what had to be in high degree of conformity to anatomy surface. To approve a good practical opportunity, it was applied and tested in concrete surgery case of maxillofacial osteotomy.

Optimisation of Strength Properties of FDM Printed Parts—A Critical Review

“…[42] Decomposable porous scaffold structures [38] Dental repairs, scaffold for organ printing and tissue engineering [43] Polycaprolactone/hydroxyapatite artificial bones to imitate goat femur [44] Maxillofacial surgery using FDM and poly-jet printing along with finite element analysis (FEA) Simulation and modelling. [45] Printing capsules in the pharmaceutical business.…”

Numerical Study of the Effect of Dental Implant Inclination

“…The impact of implant inclination on the surrounding structure has been frequently researched in the overdenture settings (Behnaz et al 2015, Gul and Suca 2014, Markarian and Ueda 2007, Cağlar et al 2006, Almeida et al 2013, Hong et al 2012, Lan et al 2010, Sljivic et al 2016, Takahashi, Shimamura and Sakurai 2010, Ueda et al 2004, Naini et al 2011, rather than in an isolated environment, as explained in Watanabe et al (2003). The intention in this study was to focus on the simpler loading conditions and to eliminate other systematical factors which arise due to the system complexity.…”

Experimental methodology for analysis of influence of dental implant design on load transfer

“…It is reported that this method provided good results in combination with dental implants and acrylate blocks [33][34][35]. This experimental study also employs consumer grade FDM 3D printing technique which is already used in dental application [36,37].…”