Patient specific bone preparation for consistent effective fixation feature engagement
AssigneeStryker Corporation
InventorMichael C. Ferko
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Abstract
An optimized press-fit between a resected bone and an articular implant may, for instance, reduce undesirable qualities, including excess micromotion, stress transmission, and/or strain. By taking into account heterogeneous bone properties, the parameters of a bone resection can be determined as to optimize the press-fit between a resected bone and an articular implant. An optimized press-fit is obtained by determining ideal engagement characteristics corresponding to the fit between the fixation features of an articular implant and a bone. Then, taking into account a bone's heterogeneous properties, the parameters of a bone resection that would substantially achieve the determined ideal engagement characteristics are determined.
Claims14
A method of determining one or more parameters of a patient-specific surgical tool, the method comprising the steps of:
- obtaining bone quality data corresponding to a bone of a joint;
- determining one or more desired engagement characteristics corresponding to a desired press-fit between a fixation feature of an implant and the bone;
- determining the one or more parameters of the patient-specific surgical tool based on the bone quality data in order to substantially achieve the one or more desired engagement characteristics between the bone and the fixation feature;
- and
- producing the patient-specific surgical tool based on the one or more parameters of the patient-specific surgical tool to substantially achieve the one or more desired engagement characteristics for the desired press-fit between the fixation feature and the bone.
Dependencies are inferred from the claim text.