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The Journal of Bone and Joint Surgery (American) 84:S90-S98 (2002)
© 2002 The Journal of Bone and Joint Surgery, Inc.

Scientific Exhibits

Computer-Assisted Navigation in Total Knee Replacement: Results of an Initial Experience in Thirty-five Patients

S. David Stulberg, MD, Peter Loan, BEng and Vineet Sarin, PhD

Corresponding author:
S. David Stulberg, MD
Department of Orthopaedic Surgery, Northwestern University Medical School, 680 North Lake Shore Drive, Suite 1028, Chicago, IL 60611. E-mail address: jointsurg@nwu.edu

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

The first 150 words of the full text of this article appear below.


   Introduction
 
The success of total knee replacement surgery depends on several factors, including proper patient selection, appropriate implant design, correct surgical technique, and effective perioperative care. The outcome of total knee replacement surgery is particularly sensitive to variations in surgical technique 1-9 . Incorrect positioning or orientation of the implant and improper alignment of the limb can lead to accelerated implant wear and loosening as well as suboptimal functional performance. A number of studies have suggested that alignment errors of >3° are associated with more rapid failure and less satisfactory functional results after total knee arthroplasty 1,10-20 . Recent studies have also emphasized that the most common cause for revision total knee replacement is error in surgical technique.

Mechanical alignment guides have improved the accuracy with which implants can be inserted. Although mechanical alignment systems are continually being refined, errors in implant and limb alignment continue to occur. It has been estimated that . . . [Full Text of this Article]


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