Hip fixation with load-controlled dynamization

摘要

System, including methods and apparatus, for hip fixation with load-controlled dynamization. In exemplary embodiments, the system may comprise a fixation element, such as a screw, configured to be placed into a proximal femur of a subject, with a leading end of the fixation element anchored in a head of the proximal femur. The system also may comprise a stop member configured to be connected (e.g., via a nail or plate) to the proximal femur. The system further may comprise a deformable member configured to be irreversibly deformed by compressive force exerted on at least a portion of the deformable member by the fixation element and the stop member in response to a load applied to the proximal femur by the subject, such that the fixation element and the stop member move relative to one another parallel to a long axis of the fixation element.

主权项

1. A system for hip fixation, comprising:
a fixation element configured to be placed into a proximal femur of a subject such that a leading end of the fixation element is anchored in a head of the proximal femur and the fixation element extends from a lateral portion of the proximal femur to the head of the proximal femur; a stop member configured to be connected to the lateral portion of the proximal femur; and a deformable member configured to be operatively disposed between the fixation element and the stop member and irreversibly deformed in response to a load applied to the proximal femur by the subject that urges the leading end of the fixation element and the stop member toward one another; wherein irreversible deformation of the deformable member in response to the load is accompanied by translational movement of the fixation element and the stop member relative to one another parallel to a long axis of the fixation element.