Patent ID: 9168075
Filing Date: 2015-10-27
Classification: A61B

Abstract:
1. A bone fixation system, comprising: a fixation device having a first surface configured to face a bone, a second surface opposite the first surface along a first direction, and an opening that extends from the first surface to the second surface along a first central longitudinal axis in the first direction, the fixation device including a plurality of protrusions that are carried by an inner surface of the fixation device that defines the opening, the opening including a first portion that is shaped as a partial sphere, and the opening further including a second portion that is frustoconically shaped, the second portion positioned between the first surface and the first portion with respect to the first direction, wherein the protrusions are circumferentially spaced from one another along the inner surface so as to define a gap that extends circumferentially between circumferentially adjacent ones of the plurality of protrusions; and a bone engaging member elongate along a second central longitudinal axis, the bone engaging member configured and dimensioned to be inserted into the opening in the fixation device, the bone engaging member having a threaded head portion; wherein the fixation device defines the protrusions prior to insertion of the bone engaging member into the opening, such that, prior to insertion of the bone engaging member into the opening, one or more of the plurality of protrusions is configured to threadedly mate with the threaded head portion to lock the bone engaging member to the plate both when: 1) the second central longitudinal axis is coincident with the first central longitudinal axis, and 2) the second central longitudinal axis is at a tilt relative to the first central longitudinal axis.