Anatomically correct prosthesis and method and apparatus for manufacturing prosthesis
AssigneeThe Trustees of Columbia University in the City of New York
InventorsGerard A. Ateshian, Van C. Mow, Robert J. Pawluk, Melvin P. Rosenwasser
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Abstract
A joint prosthesis for attachment to a bone of a patient, comprising an anchor with a head surface and a stem for attachment to an end of the bone, the head surface having an anatomically accurate shape.
Claims31
A method of manufacturing a joint prosthesis to replace a joint for a patient with a healthy joint contralateral to the joint to be replaced, comprising:
- obtaining imaging data of the patient's healthy contralateral joint surfaces;
- comparing the imaged data of the patient's healthy contralateral joint surfaces with a database of mathematical descriptions of a plurality of articular joint surface archetypes to determine which bone of the plurality of articular joint surface archetypes exhibits the smallest deviation in overall dimensions from the imaged data;
- and
- fabricating, for the joint to be replaced, a joint prosthesis to resemble the mirror image of the articular joint surface archetype which exhibits the smallest deviation in overall from the imaged data.
A method of selecting, from a collection, a joint prosthesis to replace a joint for a patient with a healthy joint contralateral to the joint to be replaced, comprising:
- obtaining imaging data of the patient's healthy contralateral joint surfaces of the healthy joint contralateral to the joint to be replaced;
- comparing the imaged data of the patient's healthy contralateral joint surfaces with a database of mathematical descriptions of a plurality of articular joint surface archetypes to determine which one of the plurality of articular joint surface archetypes exhibits the smallest deviation in overall dimensions from the imaged data;
- and
- selecting, from the collection, for the joint to be replaced, the joint prosthesis which exhibits the smallest deviation in overall dimensions from the mirror image of the articular joint surface archetype which exhibits the smallest deviation in overall dimensions from the imaged data.
A method of manufacturing a joint prosthesis to replace a joint for a patient with a healthy joint contralateral to the joint to be replaced, comprising:
- obtaining imaging data of the patient's healthy contralateral joint surfaces;
- fabricating, for the joint to be replaced, a mirror image replicate of the patient's imaged healthy contralateral joint surfaces.
A method of manufacturing a joint prosthesis for a patient's bone, comprising:
- measuring a plurality of parameters including dimensions of the bone, the patient's weight, the patient's sex, and the patient's height;
- comparing the plurality of measured parameters with a respective plurality of corresponding parameters in a database of mathematical descriptions of a plurality of articular joint surface archetypes to determine which one of the plurality of articular joint surface archetypes has parameters exhibiting the most similarity to the measured parameters;
- and
- fabricating the joint prosthesis to resemble the articular joint surface archetype which has parameters exhibiting the most similarity to the measured parameters.
A method of manufacturing a joint prothesis for a patient's bone, comprising:
- obtaining imaging data of the joint surface of the joint contralateral to the patient's bone for which the joint prosthesis is being made;
- modifying the imaged data of the joint surface of the joint contralateral to the patient's bone to provide a more functional surface topography;
- and
- fabricating a mirror image replicate of the modified imaged data to provide a functional joint prosthesis.
A method of manufacturing a joint prosthesis for a patient's bone, comprising:
- obtaining imaging data of the joint surface of the joint contralateral to the patiently bone for which the joint prosthesis is being made;
- comparing the imaged data of the joint surface of the patient's bone with a database of mathematical descriptions of a plurality of articular joint surface archetypes;
- modifying the imaged data of the joint surface of the joint contralateral to the patient's bone to provide a more functional surface. topography while exhibiting the smallest deviation in overall dimensions from one of the plurality of articular joint surface archetypes;
- fabricating the joint prosthesis to resemble the articular joint surface archetype which exhibits the smallest. deviation in overall dimensions from the Mirror image of the modified imaged data.
A method of manufacturing a joint prosthesis to replace a joint for a patient with a healthy joint contralateral to the joint to be replaced, comprising:
- obtaining imaging data of the patient's healthy contralateral joint surfaces;
- modifying the imaged data of the patient's healthy contralateral joint surfaces to provide a more functional surface topography;
- fabricating a replicate joint prosthesis of the mirror image of the modified imaged data to provide a functional joint prosthesis.
A method of manufacturing a joint prosthesis to replace a joint for a patient with a healthy joint contralateral to the joint to be replaced, comprising:
- obtaining imaging data of the patient's healthy contralateral joint surfaces;
- comparing the imaged data of the patient's healthy contralateral joint surfaces with a database of mathematical descriptions of a plurality of articular joint surface archetypes;
- modifying the imaged data of the patient's healthy contralateral joint surfaces to provide a more functional surface topography while exhibiting the smallest deviation in overall dimensions from one of the plurality of articular joint surface archetypes;
- and
- fabricating the joint prosthesis to resemble the mirror image of the articular joint surface archetype which provides a functional joint prosthesis which also exhibits the smallest deviation in overall dimensions from the modified imaged data.
An apparatus for manufacturing a joint prosthesis for a patient, comprising:
- memory means for storing a database of a plurality of joint surface archetypes acquired through measurement of a plurality of joint surfaces, said plurality of joint surface archetypes being cross-referenced by parameters including dimensions of bone associated with the joint surface, the weight of a person from whom the measurement is being taken, the sex of the person from whom the measurement is being taken, the race of the person from whom the measurement is being taken, and the height of the person from whom the measurement is being taken;
- input means for receiving a plurality of parameters exhibited by the patient;
- a microprocessor connected to said memory means for selecting one of said plurality of joint surface archetypes whose parameters most closely resemble a corresponding plurality of parameters exhibited by the patient;
- and
- a numerically-controlled fabrication means controlled by said microprocessor for fabricating the joint prosthesis to resemble the selected articular joint surface archetype.
Dependencies are inferred from the claim text.