Automated patient-specific bone-implant biomechanical analysis
Inventors
Hoffmann, Paul Frederick • Keaveny, Tony M. • Kopperdahl, David L.
Assignees
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Publication Number
US-8855389-B1
Publication Date
2014-10-07
Expiration Date
Abstract
An apparatus, method, and computer program product for providing information for surgical planning based on automated biomechanical analysis of a bone-implant system using finite element analysis of a patient's 3D medical image, including automated biomechanical analysis of bone-implant systems for use in surgical planning both pre-operatively and intra-operatively and for use in research and development studies.
Core Innovation
The invention provides a computer-implemented method for application of finite element analysis of bone-implant systems that evaluates a biomechanical performance of each bone-implant model of a set of bone-implant models for an implant implanted into a bone structure of a patient. The method receives a set of patient-specific data of the bone structure and creates, for each bone-implant model, a patient-specific bone-implant finite element model representing at least a portion of the bone structure based on the patient-specific data, in part from a pre-constructed non-patient-specific bone-implant mesh.
The invention determines an implant result for each particular bone-implant model based upon the finite element analysis of the patient-specific bone-implant finite element model associated with that particular bone-implant model. By building patient-specific finite element models using a pre-constructed non-patient-specific bone-implant mesh, the approach supports evaluating multiple bone-implant models derived from a single patient’s bone data.
The invention further supports using predefined sets of variations for implant size, implant geometry, implant design, or combinations thereof to create the corresponding patient-specific bone-implant finite element models. In at least some embodiments, variations in bone structure material property are determined in part using a statistical atlas of those variations, and the method can specify an optimal implant configuration based on the implant results.
Claims Coverage
Independent claim clm-00001 covers a computer-implemented finite element analysis method that evaluates biomechanical performance of multiple bone-implant models for a patient implant, where patient-specific finite element models are created in part from a pre-constructed non-patient-specific bone-implant mesh, and an implant result is determined for each model.
Patient-specific finite element modeling from a pre-constructed non-patient-specific mesh
Creating, for each bone-implant model of the set of bone-implant models, an associated patient-specific bone-implant finite element model representing at least a portion of the bone structure based on the set of patient-specific data, wherein the patient-specific bone-implant finite element model is created in part from a pre-constructed non-patient-specific bone-implant mesh.
Biomechanical performance evaluation via finite element analysis results
Determining an implant result for each particular bone-implant model of the set of bone-implant models based upon a finite element analysis of the patient-specific bone-implant finite element model associated with the particular bone-implant model.
Overall claim coverage centers on generating patient-specific bone-implant finite element models using a pre-constructed non-patient-specific bone-implant mesh, and using finite element analysis to determine an implant result for each bone-implant model in a set. Dependent claim coverage further refines variation parameters and may select an optimal implant configuration based on the implant results.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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