Abstract: The invention includes a method for tracking the human scapula during shoulder surgery, by a trackable device fixed to the coracoid process of the scapula. A device of the invention allows a trackable target to be fixed to the coracoid process by bone screws and an anchor. In one embodiment, a releasable coupling is provided between the anchor and the trackable target.

Abstract: An apparatus suitable for cleaning a surgically prepared working surface comprises a body portion adapted to supply pressurized fluid (preferably carbon dioxide gas) to the surgically prepared working surface and aspirate surface debris dislodged from the surgically prepared working surface. The apparatus further comprises a head portion adapted to constrain the supplied pressurized fluid to flow substantially along the surgically prepared working surface to dislodge debris there from when the head portion is in contact with the surgically prepared working surface. The dislodged surface debris are aspirated by the body portion.

Abstract: An apparatus suitable for cleaning a surgically prepared bony concavity includes a body portion adapted to supply pressurized fluid (preferably carbon dioxide gas) to the concavity and aspirate surface debris. The apparatus further comprises a head having an orifice with a plane, circular rim having a diameter less than that of the bony concavity. A method for cleaning a surgically prepared, concave, generally hemispherical bony cavity includes the steps of: covering a region of the hemispherical bony concavity with a cleaning head; supplying a pressurized fluid to the region covered by the cleaning head, and collecting the pressurized fluid from the covered region with a surface debris aspirator coupled to the cleaning head. A cleaning head having a generally circular orifice substantially seals and encloses a spherical zone to be cleaned.

Abstract: A method and apparatus verifies and optionally, corrects tracking during computer assisted surgery by tracking a plurality of trackable targets, at least one of which is initially capable of positioning independent of the other targets. A geometric relationship between said targets is calculated and later verified, to detect instability of the trackable targets and their mounting system.