Comparison of computer-assisted surgery with conventional technique for the treatment of axial distal phalanx fractures in horses: An in vitro study

Objectives-To compare the precision obtained with computer-assisted screw insertion for treatment of mid-sagittal articular fractures of the distal phalanx (P3) with results achieved with a conventional technique. Study Design-In vitro experimental study. Sample Population-Thirty-two cadaveric equine limbs. Methods-Four groups of 8 limbs were studied. Either 1 or 2 screws were inserted perpendicular to an imaginary axial fracture of P3 using computer-assisted surgery (CAS) or conventional technique. Screw insertion time, predetermined screw length, inserted screw length, fit of the screw, and errors in placement were recorded. Results-CAS technique took 15-20 minutes longer but resulted in greater precision of screw length and placement compared with the conventional technique. Conclusion-Improved precision in screw insertion with CAS makes insertion of 2 screws possible for repair of mid-sagittal P3 fractures. Clinical Relevance-CAS although expensive improves precision in screw insertion into P3 and consequently should yield improved clinical outcome. (c) Copyright 2005 by The American College of Veterinary Surgeons.