Computer-assisted, anatomic, double-bundle anterior cruciate ligament reconstruction

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Medical Imaging and Navigation

Background:

• Anatomic double-bundle anterior cruciate ligament (ACL) reconstruction requires precise bone tunnel placement for anteromedial and posterolateral bundles.
• Incorrect tunnel positioning can compromise laxity control and the functional benefits of double-bundle ACL reconstruction.
• Existing techniques may face challenges in achieving and verifying accurate tunnel placement.

Purpose of the Study:

• To present an image-free, computer-assisted technique for anatomic, double-bundle ACL reconstruction.
• To demonstrate software designed to aid in precise bone tunnel positioning for both anteromedial and posterolateral bundles.
• To evaluate the software's ability to model graft behavior and provide feedback on critical parameters.

Main Methods:

• Development and implementation of specifically designed software for computer-assisted, image-free ACL reconstruction.
• Utilizing interactive, touch-screen navigation to guide bone tunnel positioning.
• Modeling virtual anteromedial and posterolateral bundle grafts to assess graft length change, obliquity, and notch impingement.

Main Results:

• The software provides real-time feedback on graft behavior, including length change, obliquity, and potential notch impingement.
• The system allows for determination of tunnel length and obliquity.
• Preoperative and postoperative navigated laxity analysis, including objective pivot shift measurement, is enabled.

Conclusions:

• This computer-assisted technique offers a promising solution for accurate bone tunnel placement in double-bundle ACL reconstruction.
• The image-free navigation system enhances precision and provides valuable data for optimizing graft outcomes.
• Objective laxity assessment capabilities contribute to a comprehensive evaluation of surgical results.