Rapid prototyping fabrication and finite element evaluation of the three-dimensional medical pelvic model |
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Authors: | Ying Tie Ruyu Ma Ming Ye Dongmei Wang Chengtao Wang |
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Affiliation: | (1) Institute of Life Quality via Mechanical Engineering, School of Mechanical Engineering, Shanghai Jiaotong University, No.1954, HuaShan Road, 200030 Shanghai, China |
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Abstract: | This paper presents a non-uniform, periodic closed B-spline approximation algorithm for the fabrication of a medical pelvic
model, based on rapid prototyping, and also gives the finite element evaluation of the pelvic model. Rapid prototyping (RP),
when used in fabricating medical prosthesis, has a strict requirement for closeness and impermeability of STL files. Incorrect
data structure in STL files will cause the subsequent slicing process not to proceed. The non-uniform periodic closed B-spline
curve approximation method was applied to processing CT data. The precision and size of STL files was improved to optimize
the RP model of the pelvis. Finally, the model of the pelvis was evaluated with the finite element method. Results suggest
that a high similarity has been achieved in terms of shape, size and biomechanical properties of the pelvic model and the
normal one, which validates our argument that rapid prototyping with non-uniform, periodic closed B-spline algorithm is suitable
for the fabrication of a pelvic model, which will prove to be significant in the design of pelvic prostheses . |
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Keywords: | B-spline curve approximation method Finite element analysis Pelvis prosthesis Periodic closed Rapid prototyping (RP) Three-dimensional medical pelvic model |
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