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CMU-RI-TR-97-09
Robotics Institute
School of Computer Science, Carnegie Mellon University
CMU-RI-TR-97-09
Range of Motion After Total Hip Arthroplasty:
Experimental Verification of the Analytical Simulator
Branislav Jaramaz, Constantinos Nikou,
David Simon, Anthony DiGioia III
FEBRUARY 1997
CMU-RI-TR-97-09.ps
Keywords: Medical robotics, computer-assisted surgery, hip replacement
surgery
Dislocation following total hip replacement surgery represents a
significant cause of early failure, incurring additional medical
costs. The causes of dislocation are multifactorial and are related to
surgical approach, soft tissue tension, prosthetic design, and most
important, orientation of components. This paper describes experimental
verification of our analytical approach for predicting implant
impingement and dislocation. Once fully developed and tested, this ana
lytical methodology could be used as a preoperative simulation tool that
will present surgeons with information about the "safe" range of motion
and chance of dislocation based on selected component positions,
allowing for the surgical plan to be optimized based on this
criterion. Coupled with a computer-assisted clinical system for precise
implant positioning, this approach could significantly reduce the
postoperative risk of dislocation, maximize "safe" range of motion and
minimize impingement.
13 pages
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