Variation in Graft Bending Angle during Range of Motion after Suspensory Femoral Fixation in Posterior Cruciate Ligament Reconstruction: Inside-out technique versus Retro-socket Outside-in technique
Author(s):
Kang B. (South Korea (ROK))
Kang B. (South Korea (ROK))
Affiliations:
ESSKA Academy. Kang B. 05/09/18; 209797; P17-506 Topic: Arthroscopic Surgery
Byungmin Kang
Byungmin Kang
Login now to access Regular content available to all registered users.

You can access free regular educational content on the ESSKA Academy by registering as an 'ESSKA Academy User’ here

Access to Premium content is currently a membership benefit.

Click here to join ESSKA or renew your membership.
Abstract
Discussion Forum (0)
Rate & Comment (0)
Objectives: Greater variation in femoral graft bending angle during range of motion (ROM) of the knee can result in graft loosening and failure in posterior cruciate ligament (PCL) reconstruction. To compare variation in femoral graft bending angle during ROM between inside-out (IO) and retro-socket outside-in (OI) techniques for suspensory femoral fixation in PCL reconstruction using in vivo 3D-computed tomography(CT) analysis. It was hypothesized that the retro-socket OI technique would produce less variation in femoral graft bending angle during ROM of the knee than the IO technique.

Methods: Ten patients underwent PCL reconstruction by IO technique (5 patients) or retro-socket OI technique (5 patients) for suspensory femoral fixation. After PCL reconstruction, 3D-CT was taken in knee extension and 90° flexion positions to reconstruct 3D femur and tibia bone models using Mimics software. Positions of femur and tibia at 30°, 45°, and 60° of flexion were then reproduced by controlling kinematic factors. Femoral and tibial graft bending angles were measured and recorded at each position of the knee. Variations in graft bending angle in each flexion range were examined and compared between the two groups using Solidwork software.

Results: There was significant (P = 0.009) difference in variation of femoral graft bending angle between IO and retro-socket OI techniques from 0° to 90° flexion of the knee (38.83° ± 5.47° vs. 10.67° ± 7.74°, respectively). Significant (P = 0.009) difference was also noticed at 30° to 45° ROM of the knee between the two groups (6.40° ± 0.66° vs. 1.13° ± 1.26°, respectively).

Conclusions: The retro-socket OI technique resulted in less variation in femoral graft bending angle during ROM of the knee than the IO technique after PCL reconstruction.

Keywords:
Posterior cruciate ligament; Reconstruction; Femoral tunnel; Graft; Fixation
Objectives: Greater variation in femoral graft bending angle during range of motion (ROM) of the knee can result in graft loosening and failure in posterior cruciate ligament (PCL) reconstruction. To compare variation in femoral graft bending angle during ROM between inside-out (IO) and retro-socket outside-in (OI) techniques for suspensory femoral fixation in PCL reconstruction using in vivo 3D-computed tomography(CT) analysis. It was hypothesized that the retro-socket OI technique would produce less variation in femoral graft bending angle during ROM of the knee than the IO technique.

Methods: Ten patients underwent PCL reconstruction by IO technique (5 patients) or retro-socket OI technique (5 patients) for suspensory femoral fixation. After PCL reconstruction, 3D-CT was taken in knee extension and 90° flexion positions to reconstruct 3D femur and tibia bone models using Mimics software. Positions of femur and tibia at 30°, 45°, and 60° of flexion were then reproduced by controlling kinematic factors. Femoral and tibial graft bending angles were measured and recorded at each position of the knee. Variations in graft bending angle in each flexion range were examined and compared between the two groups using Solidwork software.

Results: There was significant (P = 0.009) difference in variation of femoral graft bending angle between IO and retro-socket OI techniques from 0° to 90° flexion of the knee (38.83° ± 5.47° vs. 10.67° ± 7.74°, respectively). Significant (P = 0.009) difference was also noticed at 30° to 45° ROM of the knee between the two groups (6.40° ± 0.66° vs. 1.13° ± 1.26°, respectively).

Conclusions: The retro-socket OI technique resulted in less variation in femoral graft bending angle during ROM of the knee than the IO technique after PCL reconstruction.

Keywords:
Posterior cruciate ligament; Reconstruction; Femoral tunnel; Graft; Fixation
Code of conduct/disclaimer available in General Terms & Conditions

By clicking “Accept Terms & all Cookies” or by continuing to browse, you agree to the storing of third-party cookies on your device to enhance your user experience and agree to the user terms and conditions of this learning management system (LMS).

Cookie Settings
Accept Terms & all Cookies