Patent ID: 7794503
Filing Date: 2010-09-14
Classification: A61F

Abstract:
1. A trialing system for use with a modular hip replacement system, comprising: a stem component configured to be fixed within a prepared bone, the stem component including a proximal portion defining a longitudinal axis and defining a stem locator feature indicative of an orientation of the stem component with respect to the longitudinal axis; a keyed trial component configured to engage the proximal portion in a keyed relationship while allowing access to the stem locator feature; and a trial neck component including a trial locator feature and engageable with the proximal portion and matable with the keyed trial component at a plurality of angles in a plane perpendicular to the longitudinal axis, such that when the keyed trial component is keyedly engaged with the proximal portion, the trial neck component can be i) engaged with the proximal portion, ii) rotated to a selected one of the plurality of angles with respect to the keyed trial component, and iii) mated to the keyed trial component, while allowing access to the stem locator feature and to the trial locator feature; wherein the keyed trial component includes a discrete first plurality of splines at a proximal end thereof, said discrete first plurality of splines configured to extend perpendicularly to the longitudinal axis when the keyed trial component is engaged with the proximal portion; and the trial neck component includes a second plurality of splines, the second plurality of splines formed complementary to the first plurality of splines; and wherein the keyed trial component comprises a first bore with a first diameter, the first bore extending from a distal end of the keyed trial component to a proximal end of the keyed trial component; the proximal portion comprises an elongated portion extending proximally from a widened portion, the elongated portion sized to extend through the first bore, and the widened portion including a dimension wider than the first diameter; and the stem locator feature is located on the elongated portion such that when the keyed trial component is engaged with the proximal portion, the stem locator feature is located proximal to the proximal end of the keyed trial component alone the longitudinal axis.