Abstract
A method of automatic hip prosthesis design is presented.
The shape of the tail of the prosthesis is optimized with respect to the anatomical surface of the medullary canal of the femur.
Four conventional hip roetgengrams are performed; each of them is processed by an edge detector which defines the edge of the projection of the medullary canal.
The available information about the unknown surface of the canal is made of four sheafs of straight lines originating in the X-ray focus and leaning on the edges: all those straight lines are tangent to the unknown surface.
Once mathematically translated, this information is the input to a surface “recognizer” using parametric surface spline functions that were devised for that purpose.
The resulting surface will then be used for the definition of the optimal shape of the tail of the prosthesis, and the final step will be tooling of the prosthesis by a numerically controlled millingcutter.
The major medical interests of this work lie in the reduction of the risks of loosening of the prosthesis and in the improvement of the mechanical properties of the whole.
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References
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© 1982 Springer-Verlag Berlin Heidelberg
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Cinquin, P. et al. (1982). Hip Prosthesis Design. In: O’Moore, R.R., Barber, B., Reichertz, P.L., Roger, F. (eds) Medical Informatics Europe 82. Lecture Notes in Medical Informatics, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-93201-4_35
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DOI: https://doi.org/10.1007/978-3-642-93201-4_35
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-11208-2
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