Patent ID: 8252002
Filing Date: 2012-08-28
Classification: A61F

Abstract:
1. A modular prosthetic trial for a joint prosthesis, comprising: a first piece having a proximal section and a distal section configured for implantation in a bone, the proximal section having a non-threaded proximally extending protrusion in the form of a pin having a lip; a second piece having a proximal section and a distal section, the distal section including a recess for receiving the pin; and a locking mechanism at least partially disposed within the recess of the second piece, the locking mechanism sized and shaped to engage the protrusion such that the locking mechanism locks the first piece to the second piece, the locking member includes first and second opposite walls with a recess between the first and second opposite walls through which the pin can extend, at least one of the walls defining a ramp which extends spirally towards an edge of the wall so that, with the locking mechanism in an unlocked position, the pin can be inserted into the recess until the lip has passed the ramp, and so that rotation of the locking mechanism towards a locked position causes the ramp to engage the lip and to draw the pin progressively into the recess to lock the first piece to the second piece.