Ankle replacement system and method
Various surgical devices and methods are disclosed herein. Also disclosed is multi-component prosthesis, which can be used as an ankle prosthesis. One of the disclosed surgical alignment systems includes a guide arm, a ratchet arm frame configured to be coupled slidably to the guide arm, a ratchet arm configured to be coupled to the ratchet arm frame, and a sagittal sizing guide body configured to be coupled to the ratchet arm. The sagittal sizing guide body includes a first radiopaque object disposed at a first position and a second radiopaque object disposed at a second position that is spaced apart from the first position.
1. A method comprising:
coupling an adjustment block to a first bone;
coupling a drill guide to the adjustment block, wherein the drill guide includes at least one radiopaque pin to indicate fluoroscopically at least one of an orientation and a position;
locating the at least one radiopaque pin within a fluoroscopic image;
adjusting at least one of an orientation and a position of the first bone relative to the at least one radiopaque pin;
causing the adjustment block to change at least one of an orientation and a position of the drill guide relative to the first bone in at least one of a coronal view and a sagittal view; and
selecting an implant based upon the orientation and position of the at least one radiopaque pin relative to the first bone.
2. The method of claim 1 further comprising confirming perpendicularity of said at least one radiopaque pin relative to the fluoroscopic image with at least one of a concentric pattern and an aligned cylindrical dowel pattern.
3. The method of claim 1 further comprising:
maintaining the adjustable block engaged in the first bone;
de-coupling the drill guide; and
coupling an alternative drill guide.
4. The method of claim 1 further comprising:
locating at least one fluoro-opaque profile within a fluoroscopic image.
5. The method of claim 1 further comprising:
coupling an adjustably positioned guide arm to the drill guide;
coupling a sagittal sizing guide assembly to the adjustably positioned guide arm, having at least one radiopaque sizing pattern;
locating the at least one radiopaque sizing pattern within a fluoroscopic image;
adjusting at least one of an orientation and a position of the first bone relative to the at least one radiopaque pin.